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A revision of Rhododendron. IV Subgenus Tsutsusi

July 1990
Edinburgh Journal of Botany 47(02):89 - 200

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A revision of Rhododendron subgenus Tsutsusi is presented: section Tsutsusi with 66 species is equivalent to series Azalea subser. Obtusum; and section Brachycalyx with 15 species includes some species previously placed in subser Schlippenbachii. One new species in section Tsutsusi, R. arunachalense Chamberlain & Rae, sp. nov., is described. Distribution maps are provided for most of the species.

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EDINB.

J. BOT. 47(2): 89-200 (1990)

REVISION OF RHODODENDRON

Subgenus Tsutsusi

D. F.

CHAMBERLAIN

& S. J. RAE

revision of Rhododendron subgenus Tsutsusi is presented: section Tsutsusi with 66

species

is equivalent to series Azalea subser. Oblusum; and section Brachycalyx with 15

species

includes some species previously placed in subser Schlippenbachii. One new species

section Tsutsusi, R. arunachalense Chamberlain & Rae, sp. noi\, is described. Dis-

tribution

maps are provided for most of the species.

CONTENTS

Page

Introduction to subgenus Tsutsusi 89

Presentation of the revision 90

Taxonomic characters 91

Taxonomic account 93

Identification of specimens 153

Distribution maps 177

Acknowledgements 197

Major References 197

Appendix 197

Index 198

INTRODUCTION

SUBGENUS

TSUTSUSI

This account forms the fourth part of the Revision of the genus Rhododendron co-

ordinated at the Royal Botanic Garden Edinburgh: Part I—subgenus Rhododendron

sections Rhododendron and Pogonanthum (Cullen in Notes RBG Edinb. 39:

1-207,

1980);

Part II—subgenus Hymenanthes (Chamberlain in Notes RBG Edinb. 39:

209-486, 1982); Part III—subgenera Azaleastrum, Mumeazalea, Candidiastrum and

Theorhodion (Philipson & Philipson in Notes RBG Edinb. 44: 1-23, 1986).

Part IV covers subgenus Tsutsusi, and follows the circumscription proposed by

Philipson & Philipson {Notes RBG Edinb. 40: 225-227, 1982). Two sections are

recognized in the subgenus: section Tsutsusi is equivalent to the 'Obtusum' azaleas;

section Brachycalyx includes R. mariesii, R. reticulatum, R. weyrichii, and their

immediate allies. R. tashiroi, an anomalous species that lies between sections Tsutsusi

and Brachycalyx, is here placed in the former section.

The account of subgenus Pentanthera section Pentanthera, the 'Luteum' azaleas by

Dr. K. Kron has recently been submitted. This will go to press later this year as Part

V of the Revision and it is expected that revisions of the remaining sections in subgenus

Pentanthera will also appear in Part V.

In view of the small number of species in some of the subgenera described in

EDINB.

J. BOT. 47(2)

Parts

III-V of the Revision, it has been decided to defer discussion of geographical

distributions

and taxonomic relationships for all of

them.

These will now appear with

the

account of subgenus Pentanthera.

PRESENTATION

OF THE

REVISION

The upsurge in the last twelve years in taxonomic studies in the genus Rhododendron

is marked by the publication of a number of new taxa in subgenus Tsutsusi, both from

China and Japan. Descriptions of the majority of the new species from China may be

found in P. X. Tan's Survey of

the

Genus Rhododendron in South China, published in

1983.

Most are not known in cultivation and many have been described in the absence

of adequate field studies. In addition, as we have not had access to material of several

of the types we are dependant on the type descriptions alone. It is possible that some

of the species, for which we have inadequate information, are hybrids.

Among the more recently described Japanese taxa, particularly in section Brachy-

calyx, there are several for which we have seen no material and from the descriptions

it appears that very narrow species, subspecies and varietal limits have been used.

Where we have seen no material, we have accepted the original taxonomic cir-

cumscriptions and this should be borne in mind when reading this account.

The revision of subgenus Tsutsusi presented here closely follows the format adopted

in the previous parts. The following points should be noted when using this account:

(a) Citation of Illustrations. It should be noted that only illustrations that adequately

represent the relevant species are cited. Preference is given to illustrations that are

readily available. It is therefore possible that illustrations do exist for species where

none are cited.

(b) Geographical Distributions. This is indicated by country and province only.

Chinese province names are given in their Pinyin transliteration.

or cited in available literature is given in alphabetical order of collector and in

numerical order under each collector. Where possible Chinese collectors' names are

cited in Pinyin with either the Wade Giles equivalent, or the spelling used in the

literature, where this is considered to be helpful. Efforts have been made to avoid

duplication, but it is possible that errors have been made, since the records have come

from several different Chinese herbaria and from several literature sources. Specimens

not seen by us are given in italics where we are reasonably certain the identification

is reliable. These records were used when preparing the distribution maps.

(d) Maps. The maps presented here are of two types. Distribution maps for most of

the Japanese species are available in The Species of Rhododendron in Japan (Togashi

et al., 1981). Where information has been used from this source the distributions have

been indicated by areas of shading on the distribution maps. Dot maps have been

drawn where the source of information is individual records.

RHODODENDRON SUBGENUS TSUTSUSI 91

TAXONOMIC

CHARACTERS

Some of the terms used in the species descriptions in subgenus Tsutsusi require some

clarification and amplification.

GROWTH

HABIT

All species are shrubs; some are dwarf and creeping (R. tsusiophyllum and some forms

of/?,

kiusianum); most are however moderately sized, from 0.5^1.5m tall.

LEAVES

(a) section Tsutsusi. Most of the species in this section have leaves that are of two

types (dimorphic). The summer leaves are generally small and are usually persistent

throughout the whole year. The spring leaves are larger and are generally deciduous.

There are some species where there is no distinction between the spring and summer

leaves (the leaves are apparently monomorphic). In these species both the spring and

summer leaves tend to be small so with herbarium material it can sometimes prove

difficult determining whether the leaves are of one or two types.

In most species the leaves are scattered along the stems but in R. tashiroi they are

in clusters of two or three at the ends of the branches. At maturity the leaves are more

or less hairy, especially below and on the midrib.

(b) section Brachycalyx. The leaves of the species in this section are usually of one

type and are deciduous. They are almost always clustered in whorls towards the apices

of the branches and are usually rhombic in outline, with an indumentum that is sparse

on the lamina, more dense on the midrib and often also on the petioles.

INDUMENTUM

The indumentum of subgenus Tsutsusi is restricted to a few categories (see Fig. 1) as

follows:

Simple Hairs. These are multicellular and may be weak or stiff (setose). The leaf

indumentum in both sections is setose.

Flattened

Hairs.

These too are multicellular but are ribbon-like and sometimes lacerate

at the apex. They are particularly well marked on the young stems of many of the

species in section Tsutsusi whilst those in section Brachycalyx are setose.

Stipitate Glands. In some species of both sections Tsutsusi and Brachycalyx there are

stipitate glands that may be short-stalked or more or less setose-glandular. These

glands may occur on both the vegetative and floral parts of the plants.

INFLORESCENCE

The flowers are solitary or arranged in subumbellate racemes with up to 4 flowers in

section Brachycalyx and up to 15 flowers in section Tsutsusi.

CALYX

The calyx is often minute though it can be well developed with lobes up to 30mm in

some species. In R. hidakanum (section Brachycalyx) the lobes are purple, like the

EDINB.

J. BOT. 47(2)

FIG

1. Rhododendron corolla shapes (a-e) and hair types (f-i) (diagrammatic): a,

funnel-campanulate open: R.

wadanum;

b, funnel-shaped: R.

kaemferi;

c, funnel-cam-

panulate: R.

microphyton;

d, rotate-campanulate: R.

hunanense;

e, tubular-campanulate:

mariae;

flattened

and

lacerate:

linearifolium;

simple:

nakaharai;

h, i, stipitate:

h, R. oldhamii; i, R. macrosepalum.

RHODODENDRON SUBGENUS TSUTSUSI

corolla;

in all

other species

the

calyx

green.

The

indumentum

of the

calyx usually

resembles that

of the

pedicels though

some species

the

lobes

are

ciliate.

COROLLA

The corolla

usually zygomorphic

and

generally 5-lobed (sometimes 4-lobed

in R.

tschonoskyi

and R.

tsusiophyllum).

range of corolla shapes (see Fig.

1) is

categorized

as follows:

Rotate-Campanulate.

The

tube

broad

and

short

and the

lobes

are

widely spreading.

Campanulate.

The

tube

parallel-sided from

broad base

and the

lobes

are com-

paratively short

and

spreading.

Funnel-Campanulate.

The

tube

flared, widening above from

narrow base

and the

lobes

are

spreading.

Funnel-Shaped {Infundibular). Similar

funnel-campanulate

but

with less spreading

lobes.

Tubular-Campanulate.

The

tube

narrow

and

parallel-sided, from

narrow base

and

the lobes

are

spreading.

STAMENS

There

are

(3—)5—10 zygomorphically arranged stamens;

the

filaments

are

glabrous

pilose towards

the

base.

STYLE

The style

usually glabrous

for

most

of its

length, though

it is

sometimes hairy

the extreme base,

occasionally glandular.

SEEDS

The seeds

are

relatively uniform, oblong

fusiform, unwinged, terete

angled

keeled.

TAXONOMIC

ACCOUNT

Subgenus Tsutsusi (Sweet) Pojarkova in Fl. URSS 18: 55 (1952).

Shrubs, sometimes

dwarf;

indumentum of simple bristles that are sometimes ribbon-

like and flattened, or of stiff glandular hairs. Leaves persistent and/or deciduous, in

whorls of three or scattered along the stems. Vegetative buds and inflorescence

enclosed within the same bud scales. Flowers variously shaped, from rotate to tubular-

campanulate. Stamens (4—)5-10(-12). Ovary strigose to glandular. Seeds unor-

namented.

la. Leaves linear to broadly ovate, usually of two kinds, the spring

leaves larger and deciduous, the summer leaves smaller and

persistent through the winter, if of one kind only then persistent,

scattered along the stems (but see R. tashiroi); corolla rotate

to tubular-campanulate Sect. Tsutsusi

94 EDINB. J. BOT. 47(2)

lb.

Leaves rhombic to rhombic-ovate, of one kind, deciduous in

winter, in pseudowhorls of

(2-)3;

flowers appearing before or

with the leaves, corolla funnel-shaped to funnel-

campanulate Sect. Brachycalyx (p. 143)

Section Tsutsusi Sweet, Brit. Fl. Garden ser. 2, 2: 128 (1833). (based on 'Tsutsusi'

Kaempfer, Amoen. Exot. Fasc. 845, 1712) = R. kaempferi Planchon.

Syn.: Series Azalea Subseries Obtusum & Subseries Tashiroi.

Genus Tsusiophyltum Maxim., Rhododendr. As. Orient. 12

(1870).

Type species: R. tsusiophyllum Sugimoto.

Sect. Tsusiopsis Sleumer, Bot. Jahrb. 74: 527 (1949). Type spec-

ies:

R. tashiroi Maxim.

Subsect. Dimorphica P.X.Tan, Survey Gen. Rhododendron S.

China 87 (1983). Type species: R. simsii Planchon.

Subsect. Monomorphica P.X.Tan, op. cit. 91 (1983). Type spec-

ies:

R. ripaecola P.X.Tan (a syn. of R. naamkwanense Merrill

var. naamkwanense).

Subsect. Obtusa Spethmann, PI. Syst. Evol. 157:23 (1987). Type

species as for Section Tsutsusi.

Subsect. Tashiroia Spethmann, loc. cit. (1987). Type R. tashiroi

Maxim.

Type species of section: R. indicum (L.) Sweet

la. Shoots with spreading hairs 2

Shoots with adpressed hairs 13

2a. Flowers more than 25mm long (Japan, Taiwan) 3

Flowers up to 25mm long or unknown (Mainland China) 4

3a. Flowers 25-35mm, funnel-shaped; stamens (8-)

_ 22. oldhamii

Flowers 35-50mm, broadly funnel-shaped; stamens

5(-7) 27. macrosepalum

4a. Stamens 10; infloresence 3^4-flowered 5. rufohirtum

Stamens 5; infloresence (3-)5-15-flowered 1 5

5a. Leaves 9-15(-20) x 3-8cm; style glandular; filaments

glabrous 3. yaoshanicum

Leaves smaller or if as large then filaments puberulent; style

not glandular 6

6a. Calyx 4-5mm, with narrowly lanceolate lobes 7. rivulare

Calyx

1.5-3mm,

with broad or + obsolete lobes 7

7a. Corolla up to 10mm long 4. hunanensc

Corolla 15-25mm long 8

8a. Leaves 3.5-3.8cm, indumentum yellowish below 8. apricum

Leaves (3.5-)4-10cm, indumentum brown below 9

9a. Inflorescence 5-6-flowered 2. jinxiuense

RHODODENDRON SUBGENUS TSUTSUSI

Inflorescence

10-or

more-flowered

10a. Leaves densely hairy below, hairs brownish-red

Leaves sparsely hairy below, hairs

not

brownish-red

lla. Corolla 15-20mm

rufulum

Corolla c.25mm 10.

florulentum

12a. Corolla rotate-campanulate; 8mm broad near

base 1.

rhuyuenense

Corolla tubular-campanulate; at most 3^mm broad near

base

11. kwangtungense

13a. Stamens (6-)7-l

Stamens (3-)5(-6) 37

14a. Calyx 5-15mm long 15

Calyx 1-5mm long 19

15a. Young shoots with flattened and pilose hairs 30.

mucronatum

Young shoots with flattened hairs only 16

16a. Leaves with dense sericeous indumentum below

(China)

21. pulchroides

Leaves with sparse to scattered indumentum below (China,

Japan, Korea) 17

17a. Bud scales viscid on inner surface (China; Taiwan; S Japan,

Ryukyu Islands) 29.

simsii

Bud scales not viscid (Japan, Korea) 18

18a. Corolla rose-red to scarlet (S Japan, Ryukyu

Islands) 26.

scabrum

Corolla pink (Korea; Japan, Tsushima

Islands) 28.

yedoense var. poukhanense

19a. Corolla 10-25mm long 20

Corolla 20-60mm long 27

20a. Leaves 0.5-1.5cm long, upper surface glabrescent or with

scattered hairs borne on pustules 21

Leaves (l-)1.5-8cm long, upper surface persistently hairy 22

21a. Corolla c.l5mm long 42.

noriakianum

Corolla 20-25mm (-40mm) long 49.

nakaharai

22a. Flowers lilac-purple (Philippines) 46.

subsessile

Flowers pink to red (W China, Taiwan) 23

23a. Flowers red (W & S China) 24

Flowers pink (Taiwan) 25

24a. Leaves acuminate, 2-2.7 x as long as broad (Sichuan,

Yunnan) 47.

atrovirens

Leaves acute, 3-6 x as long as broad (Hainan,

Guangxi) 20.

hainanense

96 EDINB.

BOT.

47(2)

25a. Style glabrous

hairy only

extreme base; pedicels 2-4mm,

hidden

by the

persistent

bud

scales

40.

rubropilosum

Style hairy in lower

half;

pedicels c.5mm, not hidden by the bud

scales 26

26a. Leaves sparsely hairy beneath; pedicels covered with whitish

flattened hairs 39

lasiostylum

Leaves densely strigose beneath; pedicels covered with reddish-

brown terete hairs : 23.

taiwanalpinum

27a. Leaves 0.5-3cm long; 1.2-2 x as long as broad 28

Leaves 2-7cm long; 2.5-6 x as long as broad 29

28a. Flowers scarlet; leaves chartaceous (Taiwan) 33. longiperulatum

Flowers white to purplish pink; leaves subcoriaceous

(Japan) 32.

eriocarpum

29a. Flowers bright red to scarlet (see also 25. kanehirai from

Taiwan) 30

Flowers white to pink or rose-purple 32

30a. Flowers 35-60mm long 29.

simsii

Flowers 15-30mm long 31

31a. Pedicels c.6mm; leaves acuminate (Sichuan,

Yunnan) 47.

atrovirens

Pedicels 2-3mm; leaves acute (Hainan, Guangxi) 20. hainanense

32a. Flowers white, 40-50mm (Japan, Bonin Islands) _ 31. boninense

Flowers pink to rose-purple, rarely white, 25-40mm (China,

S Japan) 33

33a. Corolla narrowly funnel-campanulate 19.

subflumineum

Corolla broadly funnel-shaped to funnel-campanulate 34

34a. Calyx lobes rounded, 3-7mm long 29.

simsii

Calyx minute, lobes up to lmm long 35

35a. Pedicels 8-15mm; shoot indumentum weak, soon deciduous;

leaves probably monomorphic 24.

tashiroi

Pedicels 5-8mm; shoot indumentum

stiff,

persistent; leaves

dimorphic 36

36a. Corolla tube c.lOmm long, sparsely puberulous; leaves

indistinctly crenulate, c.3 x as long as broad

(Guangdong)

13. tenuilaminare

Corolla tube 15-25mm long, glabrous; leaves entire, 4 x

as long as broad (Taiwan) 25.

kanehirai

37a. At least some leaves more than 3cm long 38

Leaves less than 3(-3.5)cm long 54

38a. Corolla 5-10mm long, glandular on outer surface 39

Corolla (10-)12-35mm long, glabrous or hairy (eglandular)

on outer surface 40

RHODODENDRON SUBGENUS TSUTSUSI

39a. Leaves

1.5-2cm

broad; young shoots with

least some hairs

glandular

44. jinpingense

Leaves 0.5-1.4cm broad; young shoots with an eglandular

indumentum 48. fuchsiifolium

40a. Corolla tubular-campanulate 41

Corolla funnel-shaped to funnel-campanulate 43

41a. Leaves 2-2.5 x as long as broad; inflorescence

7-12-flowered 14. mariae

Leaves 3^ x as long as broad; inflorescence

3-6(-12)-flowered 42

42a. Corolla c.35mm; pedicels c.8mm 12. loniceriflorum

Corolla 20-30mm; pedicels 10-15mm 17. chrysocalyx

43a. Corolla c.30mm; leaves c.6 x as long as broad _ 18. meridionale

Corolla 10-30mm; leaves 1.7-4 x as long as broad 44

44a. Leaves 3.5-4 x as long as broad (Japan) 37. tosaense

Leaves

1.7—3(—3.3)

x as long as broad (NE India,China,

Vietnam, Japan) 45

45a. Corolla lobes shorter than to as long as tube 46

Corolla lobes

1.5-2.3

x as long as tube 52

46a. Leaves 5.7-9cm long, apex acute to apiculate 6. flumineum

Leaves

1-5.5cm

long, apex obtuse to acuminate 47

47a. Filaments glabrous; corolla white 15. cretaceum

Filaments hairy; corolla rose-purple to red 48

48a. Inflorescence 2-3-flowered; corolla 20-30mm 35. kaempferi

Inflorescence 3-10-flowered; corolla 12-16mm 49

49a. Young leaves densely sericeous beneath; corolla tube

hairy on outer surface 54. seniavinii

Young leaves sparsely to densely hairy beneath but not

sericeous; corolla tube glabrous on outer surface 50

50a. Inflorescence 8-10 flowered; leaves

1.7-1.8

x as long as

broad 65. huiyangense

Inflorescence 3-6 flowered; leaves 2-3 x as long as broad 51

51a. Corolla tube 4mm wide at base; style strigose in lower third

(Guangdong) 16. subcerinum

Corolla tube 2-3mm wide at base; style glabrous (China,

Yunnan, SW Sichuan; ?Thailand) 43. microphyton

52a. Corolla white tinged rose, tube papillate within 52. saxicolum

Corolla pink to reddish purple, tube glabrous within 53

53a. Corolla pink, anthers without apical projections

(NE India) 53. arunachalense

Corolla reddish purple, anthers with apical projection (China,

Guangdong) 57. bicorniculatum

EDINB. J. BOT. 47(2)

54a.

55a.

56a.

57a.

58a.

59a.

60a.

61a.

62a.

63a.

64a.

65a.

66a.

67a.

68a.

Corolla

5-10(-l

l)mm long

Corolla 10-50mm long

Corolla glandular or hairy on outer surface

Corolla glabrous on outer surface

Corolla tubular-campanulate, lobes 0.5 x as long as

tube

66. tsusiophyllum

Corolla open funnel-shaped to funnel-campanulate, lobes

1-1.2 x as long as tube

Corolla hairy on outer surface; style strigose57

Corolla glandular on outer surface; style glandular, sometimes

also hairy 59

60.

minutiflorum

Leaves 0.7-1.lcm long; floral buds not sticky.

Leaves

1.5-1.8cm

long; floral buds sticky or

viscid

59. viscigemmatum

Inflorescence 2-3-flowered; pedicels with eglandular hairs

(Guangdong)

58. chunii

Inflorescence 3-5-flowered; pedicels with an understorey of

glandular hairs (Guangxi Guizhou)

48. fuchsiifolium

Leaves

0.6-0.8

x 0.3-0.5cm

61. myrsinifolium

Leaves 1-3.5 x 0.5-1.5cm __ 61

Corolla white (Japan)

51. tschonoskii

Corolla reddish to pale purple (Hunan)

Leaves 3.5-4 x as long as broad

Leaves 1-3 x as long as broad

Corolla 20-50mm

Corolla 10-22mm

55.

yangmingshanense

37.

tosaense

Leaves 2.3-3 x as long as broad; corolla 30-50mm 34. indicum

Leaves

1.7-2.5

x as long as broad; corolla 10-30mm 65

Pedicels 2-3mm; filaments glabrous; calyx minute,

c.lmm

(Guangdong)

56. naamkwanense

Pedicels 3-10mm; filaments hairy or papillate; calyx 2-5mm

(Taiwan, Japan) 66

Pedicels 10mm

41. sikayotaizanense

Pedicels

3-5mm

Anthers apiculate at base; flowers pink

(Taiwan) __

38. breviperulatum

Anthers without an apiculus; flowers red (in cultivation

colour various; Japan)

35. kaempferi

Style stipitate-glandular; corolla stipitate-glandular on outer

surface

45. subenerve

Style eglandular-hairy or glabrous; corolla glabrous or

hairy on outer surface 69

RHODODENDRON SUBGENUS TSUTSUSI

69a. Leaves 0.2-0.6cm broad,

up to

1.4cm long (Japan, Taiwan)

_ 70

Leaves (0.5-)0.6-2.5cm broad,

up to

4cm long (Japan,

Mainland China)

70a. Calyx with linear-lanceolate, c.4mm lobes; corolla

red 41. sikayotaizanense

Calyx lobes rounded

ovate,

up to

3mm long; corolla

rose-pink (occasionally red-purple

kiusianum)

71a. Flowers usually solitary; pedicels c.3mm 50. serpyllifolium

Flowers 2-3; pedicels

5-10mm

36. kiusianum

72a. Inflorescence 2-3-flowered (Japan)

36. kiusianum

Inflorescence 3-12-flowered (Mainland China) 73

73a. Outer surface of corolla tube hairy

54. seniavinii

Outer surface of corolla tube glabrous 74

74a. Inflorescence 8-12-flowered 75

Inflorescence 2-6-flowered 76

75a. Leaves 2-2.4 x as long as broad, apex acute

62. unciferum

Leaves

1.7-1.8

x as long as broad, apex blunt,

mucronate

65. huiyangense

76a. Leaves with a dense covering of slender strigose hairs beneath;

dwarf

shrub,

0.3-2m

(E Burma; SW China, Yunnan;

? Thailand) :

43. microphyton

Leaves sparsely covered with broad flattened strigose hairs

beneath; shrub, l-3m (Guangxi, Guangdong, Fujian) 77

77a. Filaments minutely pubescent below; corolla hairy

within

63.

tsoi

Filaments glabrous; corolla glabrous within

64. gratiosum

R. rhuyuenense Chun in P.X.Tan, Survey Gen. Rhododendron S. China 96 (1983).

Type: Guangdong, Rhuyuan Xian, Ching-Si-Tung, in silvis montis saxis, 7 vi 1933,

X.P. Goo

(S.P. Ko) 52804 (holo. IBSC, iso. PE).

Syn.: R.

lingii

Chun in Ching, Icon. Corm. Sin.

3:151,

f.4256

(1974)—

Chinese description only. Type as for R.

rhuyuenense.

Shrub, 2-3m; young shoots spreading-stipitate-glandular, sticky. Leaves persistent,

coriaceous dimorphic; spring leaves lanceolate-elliptic,

5.5-7.5

x 2.3-3cm, c.2.5 x

as long as broad, apex acuminate, base cuneate, margin revolute, upper surface

sparsely strigose, especially on midrib, lower surface setose; summer leaves 18-30 x

8-10mm,

otherwise as for spring leaves; petioles 4-8mm, spreading-setose; Inflor-

escence

10-14-flowered; pedicels 13-15mm, strigose, sticky. Calyx minute, strigose,

lobes

triangular-lanceolate.

Corolla

rotate-campanulate, c.25mm, rose-red with purple

flecks; tube c.10 x 8mm, glabrous.

Stamens

filaments

sparsely puberulent in lower

half.

Ovary

strigose; style puberulent below.

Capsule

ovoid, c.7 x

5-6mm,

strigose.

China (Guangdong, Hunan, Jiangxi). Rocky places in upland woodlands, c.800m.

Map 1.

100 EDINB. J. BOT. 47(2)

Closely allied to both R. yaoshanicum and R.jinxiuense but differing from both in

its broader corolla tube, etc.

R. jinxiuense Fang & M.Y. He, Bull. Bot. Res. N.E. Forest. Inst. 2(2): 89,t.7 (1982).

Type: China, Guangxi, Jinxiu Yaozu Zizhi Xian (Dayaoshan Xian), 1000m, 20 v

1964,

F.N. Wei 894 (holo. IBK, n.v., iso. IBSC).

Shrub, c.3m; young shoots densely spreading-glandular-setose. Leaves persistent,

coriaceous, dimorphic; spring leaves ovate to oblong-ovate, 7-10 x 2-2.5cm, 2-3 x

as long as broad, apex acuminate, base rounded, upper surface soon glabrescent,

lower surface with greyish brown indumentum, especially on veins and midrib; sum-

mer leaves 25-30 x 15-20mm, otherwise as for spring leaves; petioles 5-7mm, densely

hirsute and glandular. Inflorescence 5-6-flowered; pedicels densely brownish-

spreading- hairy. Calyx c.2mm, hirsute, lobes triangular-ovate, ciliate. Corolla funnel-

shaped, 18-20mm, purple; tube c.7 x 4mm, glabrous. Stamens 5, filaments puberu-

lent. Ovary densely hirsute; style hirsute below. Capsule not known.

China (Guangxi). Alt. 1000m. Known only from the type. Map 1.

Closely allied to R. yaoshanicum (q.v.).

R. yaoshanicum Fang & M.Y. He, Bull. Bot. Res. N.E. Forest. Inst. 3(1): 3, t.3

(1983). Type: China, Guangxi, Xiangzhou Xian, Guehen, 5 v 1931, S.S. Ying 2118

(holo. IBSC, iso. E).

Small shrub; young shoots spreading-glandular-setose; indumentum becoming pale

greyish-brown, sometimes glabrous. Leaves chartaceous, scattered along branches;

spring leaves oblong to oblong-lanceolate, 9-15(-20) x 3-8cm, apex acuminate, base

broadly cuneate, margin setulose, upper surface glabrescent, lower surface sparsely

setulose; summer leaves smaller, up to

x 4mm, otherwise as for spring leaves;

petioles 5-15mm, densely spreading-brownish-setose, also with short glandular hairs.

Inflorescence 10-15-flowered; pedicels c. 10mm, densely setulose. Calyx c.3mm, densely

setulose, teeth minute. Corolla funnel-campariulate, 13-15mm, red; tube 7-8mm,

glabrous. Stamens 5, filaments glabrous. Ovary brown-setulose; style glandular-setose

in lower

half.

Capsule oblong to oblong-ovoid, 5-7mm.

China (Guangxi). Map 1. "

Closely allied to R. jinxiuense but differing in its glandular style and glabrous

filaments. Probably also allied to R. kwangtungense.

4. R. hunanense [Chun ex] P.X-Tan, Bull. Bot. Res. N.E. Forest Inst. 2(1): 92 (1982).

Type: China, Hunan, Mang Shan, 1700m, 2 v 1934, X.P. Gao, (S.P. Ko) 54218 (holo.

IBSC,

photo. E; iso. PE).

Syn.: R. hunanense [Chun ex] P.X.Tan var. mangshanicum Tan, loc.

cit., t.4 (1982). Type: China, Hunan, Yizhang Xian, Mang

Shan, 500m, 26 x 1942, S.Q. Chen (S.H. Chun) 2937 (holo.

IBSC,

photo. E.)

Shrub, c.2m; young shoots densely covered with spreading hairs and villose glands.

Leaves dimorphic, chartaceous; spring leaves elliptic to ovate-lanceolate, 3-7 x 1.5-

RHODODENDRON SUBGENUS TSUTSUSI 101

2.8cm, 2-2.2 x as long as broad, apex acute to acuminate, base cuneate, margin

entire, ciliate, upper surface strigose, soon glabrescent, lower surface pale, densely

brownish-villose-strigose; summer leaves obovate, 15-20 x

8-10mm,

otherwise as for

spring leaves; petioles 5-8 mm, densely strigose.

Inflorescence

c.lO-flowered; pedicels

5-7mm,

densely brownish-strigose. Calyx minute, densely strigose, lobes oblong.

Corolla

rotate-campanulate, pale lilac, with darker

flecks,

c.lOmm; tube c.5 x 3mm.

Stamens 5, densely puberulent below.

Ovary

densely strigose; style strigose at base.

Capsule

ovoid, 5-6 x c.5mm.

China (Hunan). Wooded valleys, 700-1700m. Map 1.

The type of var.

hunanense

is represented by two dissimilar specimens. One, which

is labelled as the type, has relatively small spring leaves and the other, with larger

leaves, resembles the type of

var.

mangshanicum.

4*.

flosculum

Fang & G.Z. Li, Bull. Bot. Res. N.E. Forest. Inst. 4(1): 4 (1984).

Type: China, Guangxi, Ziyuan Xian, Maoer Shan, 1700m, 26 v 1982, G.Z. Li 10720

(holo.

IBK, n.v.).

Differs from R.

hunanense

in its 2-3-flowered inflorescence, its glabrous stamens

and in its less dense stem and leaf indumentum. The authors compare this species

with

R.jinxiuense

but the description leads

to believe that it

closer to and possibly

conspecific with R.

hunanense,

the specimens of which were probably not available to

the authors. The type locality of R. flosculum is in E Guangxi, close to the western

edge of

the

range of R.

hunanense.

5. R. rufohirtum Hand.-Mazz., Anz. Akad. Wiss. Wien 1921(18): 9 (1921). Type:

China, Yunnan, prope Hsinlung at septentr. urbis Yunnanfu, 2000m, 10 iii 1914,

Handel-Mazzetti 493

(iso. E).

Much-branched shrub with slender branches; young shoots densely hirsute, with a

dense covering of spreading brownish strigose and slender pilose hairs. Leaves ?

monomorphic, chartaceous, ovate-lanceolate, 2.5-6.5 x

1.3-2.5cm,

2-2.5 x as long

as broad, apex acuminate, base cuneate to almost rounded, margin entire, ciliate,

upper surface pilose, lower surface pale, pilose, with an admixture of strigose hairs,

especially on midrib; petioles 5-10mm, densely hairy.

Inflorescence

3-4-flowered;

pedicels c.5mm, covered with reddish-brown pilose hairs. Calyx densely covered

with reddish-brown strigose hairs, lobes narrowly obovate, c.3mm.

Corolla

funnel-

campanulate, deep rose, c.20mm; tube c.9mm, outer surface glabrous, inner surface

papillate-pilose. Stamens 10, as long as corolla,

filaments

pilose below middle. Ovary

densely hairy; style hairy at

base.

Capsule

ovoid, c.8 x 6mm, brown-spreading-hairy.

China (E &

Yunnan, W Guizhou). Sandy soil, etc., 1800-2000m. Map 1.

Probably allied to R.flumineum.

6. R.

flumineum

Fang & M.Y. He, Bull. Bot. Res. N.E. Forest. Inst. 2(2): 91 (1982).

Type: China, Yunnan, Jinping Xian, 1800m, 30 iii 1958, Q.

Huang 291

(holo. PE).

Shrub,

2-3m; young shoots densely adpressed-strigose. Leaves persistent, chartaceous,

dimorphic; spring leaves elliptic, 5.7-9 x 2.3-3cm, 2.3-2.5(-3) x as long as broad,

102 EDINB. J. BOT. 47(2)

apex acute to cuspidate, both surfaces with scattered adpressed hairs on lamina, hairs

more dense on midrib; summer leaves (12-)25-30 x (8-) 14-15mm; petioles 6-8mm,

adpressed-strigose. Inflorescence 3-7-flowered; pedicels 4-8mm, densely golden-

brown-strigose. Calyx c.lmm, strigose. Corolla funnel-campanulate, pinkish white to

red, with darker flecks, c.l8mm; tube c.9mm, 3mm broad at base, 6mm broad below

lobes,

glabrous on outer surface. Stamens 5, filaments glabrous. Ovary densely stri-

gose;

style strigose towards base. Capsule c.7 x 2.5mm, ovoid, strigose.

China (S Yunnan). Mixed forest, 1400-1750m. Map 1.

Closely allied to R. rufohirtum but differing in the greater number of flowers per

inflorescence and in the adpressed-hairy indumentum on the shoots.

7. R. rivulare Hand.-Mazz., Anz. Akad. Wiss. Wien 1921(18): 8 (1921). Type: China,

Guizhou, inter oppidum Duyun et vicum Lopusse, 750-900m, vii 1917, Handel-

Mazzetti 10696 (holo. W, n.v., iso. E, fragm.).

Shrub, elm; young shoots covered with spreading, long and eglandular, and short and

gland-tipped, ferrugineous hairs that become fuscous. Leaves dimorphic, chartaceous;

spring leaves ovate-lanceolate, 4-9 x

1.5-5cm,

1.8-2.3

x as long as broad, apex

acuminate to mucronate, base rounded, margin entire, upper surface sparsely

pubescent at first, lower surface loosely hirsute and viscid when young; summer

leaves 10-30 x 5-10mm, otherwise as for spring leaves; petioles 4-13mm, with long

eglandular and short and glandular, ferrugineous hairs. Inflorescence many-flowered;

pedicels c.lOmm, pubescence as for petioles. Calyx c.4-5mm, lobes narrowly lanceo-

late,

ciliate. Corolla tubular-campanulate, purplish-red, 22-25mm; tube c. 1 Omm, outer

surface glabrous, inner surface puberulent. Stamens 5, puberulent below middle.

Ovary rufous-setose, style hairy at base. Capsule c.lOmm long.

China (E Sichuan, Guizhou, Guangxi, Hunan, Fujian). Open woodland, ravines, 400-

900m. Map 2.

8. R. apricum P.X.Tan, Bull. Bot. Res. N.E. Forest. Inst. 2(4): 79, f.l (1982). Type:

China, Fujian, Shanghang Xian, Wong-Yong, 400-500m, 13 v 1974, L.G. Li (L.K.

Lee) 740740 (holo. Inst. Mat. Med. Fujian).

la: Tan, Survey Gen. Rhododendron S. China f.23 (1983).

Shrub; young shoots densely spreading-glandular-pubescent and setulose. Leaves

dimorphic, coriaceous; spring leaves elliptic-oblong,

3.5-3.8

1.5cm,

c.2 x as long

as broad, apex shortly acuminate, margins entire; upper surface with lamina soon

glabrescent, lower surface with a yellowish brown pubescence and a few short strigose

hairs;

summer leaves elliptic-oblong to linear, 15-18 x c.7mm, otherwise as for

spring leaves; petioles 2-2.5mm, densely spreading-setulose and glandular pubescent.

Inflorescence c.l4-flowered, pedicels 5-7mm, densely strigose. Calyx strigose, lobes

small, triangular. Corolla narrowly funnel-shaped, rose-red, c.l8mm; tube 10mm,

2.5mm at base, 4mm broad below lobes. Stamens 5, filaments glabrous. Ovary setose;

style glabrous. Fruit not known.

China (Fujian). Map 2.

RHODODENDRON SUBGENUS TSUTSUSI 103

Allied by the author to R. falcinellum, a species treated by us as a synonym of R.

rufulum,

but differing from the latter in the yellowish brown leaf indumentum, etc.

R. rufulum P.X.Tan, Survey Gen. Rhododendron S. China 100, f.24 (1983). Type:

China, Fujian, Sanming Xian, Ziyangtou, 31 iv 1927, Ling Ying 216 (holo. IBSC, iso.

KUN).

Syn.: R. rufescens P.X.Tan, Bull. Bot. Res. N.E. Forest. Inst.2(4): 86

(1982) non Franchet (1895).

apricum P.X.Tan var. falcinellum P.X.Tan, op. cit. 80 (1982);

falcinellum P.X.Tan, Survey Gen. Rhododendron S. China

98,

f.23 (1983). Type: China, Fujian, Anxi Xian, lu-tin, 20 iv

1974,

L.G. Li(L.KLee) 740125 (holo. Inst. Mat. Med. Fujian).

? R. spadiceum P.X.Tan, Bull. Bot. Res. N.E. Forest. Inst. 2(4):

87 (1982). Type: China, Fujian, Shanghang Xian, Chungtu, 8

v 1974, Y.Z. Jiang 740703 (holo. Inst. Mat. Med. Fujian).

Shrub,

to 2m; young shoots densely covered with spreading rufous glandular hairs.

Leaves dimorphic, coriaceous, elliptic to elliptic-oblong, sometimes subfalcate; spring

leaves 3.6-6 x

1.5-2.5cm,

c.2.3 x as long as broad, apex acuminate, base cuneate,

margin

entire,

upper surface densely strigillose, soon glabrescent, lower surface densely

rufous-strigillose; summer leaves as for spring leaves but half the size; petioles 5-

8mm, densely spreading-strigose. Inflorescence 3-14-flowered; pedicels c.lOmm,

densely strigose. Calyx densely strigose, lobes minute. Corolla tubular-campanulate,

reddish-purple, 15-20mm; tube 7-10 x c.2mm, glabrous. Stamens 5, filaments glabr-

ous.

Ovary densely strigose; style glabrous. Capsule ovoid, 6-8 x c.4mm, densely

reddish-brown strigose.

China (Fujian). Mixed woodland, c.500m. Map 2.

falcinellum differs only in its fewer (3-5-flowered) inflorescence; R. rufulum may

also have subfalcate leaves. It is therefore not maintained as a separate taxon. R.

spadiceum apparently only differs in the less coarse and spreading indumentum on

the young shoots and petioles. It is almost certainly synonymous with or a hybrid of

rufulum, but without reference to further material we are not sure of its status.

rufulum is allied to R.florulentum (q.v.).

9*.

R. taipaoense T.C. Wu & P.X.Tan, Med. Mat. Guangd. 4: 36, f.5 (1978). Type:

China, Guangdong, Dabu Xian, 700m, 9 vi 1957, L. Teng 4963 (holo. IBSC).

Map 2.

Doubtfully distinct from R. rufulum but with leaf indumentum deciduous and

possibly with a crenate calyx.

10.

R. florulentum P.X.Tan, Bull. Bot. Res. N.E. Forest. Inst. 2(4): 80, f.2 (1983).

Type:

China Fujian, Longyan Xian, Yen-Chung, 10 v 1974, L. G. Li (L. K. Lee)

740501 (holo. Inst. Mat. Med. Fujian).

Syn.: R. hepaticum P.X.Tan, Survey Gen. Rhododendron S. China

98,

f.3 (1983). Type: China, Guangdong, Jiaoling Xian, Shek-

104 EDINB. J. BOT. 47(2)

wu Chuen, Tafong Chang, 1100m, 9 v 1957, L. Teng 4669

(holo. IBSC).

piceum P.X.Tan, Bull. Bot. Res. N.E. Forest. Inst. 2(4): 83

(1983). Type: China, Fujian, Sanming Xian, Shiao-Hu, 20 iv

1964,

Fujian Forestry Coll. (Silvicul Fok.) 86 (holo. IBSC).

Shrub, c.2m; young shoots densely spreading-setulose and glandular-hairy. Leaves

persistent, dimorphic, elliptic; spring leaves

3.5-8.5

1.2-4.5cm,

2.2-3 x as long as

broad, apex acute to acuminate, base cuneate, margin entire, upper surface becoming

greyish-setulose, lower surface with a ± dense reddish-brown setulose indumentum;

summer leaves smaller, 22-30mm, otherwise as for spring leaves; petioles 5-10mm,

densely brownish-setulose. Inflorescence 7-14-flowered; pedicels 10-20 mm, densely

brownish-strigose. Calyx minute, indumentum as for pedicels, lobes narrowly tri-

angular to + absent. Corolla tubular-campanulate, reddish purple to rose, c.25mm;

tube 14-16 x 2-3mm, glabrous; lobes 8-10mm. Stamens 5, filaments glabrous or

puberulent below. Ovary densely brownish-strigose; style glabrous. Capsule 5-8mm,

ovoid, densely brownish-strigose.

China (E Guangdong, S Hunan, W Fujian). Open woodland, c.l 100m. Map 2.

hepaticum differs from R. florulentum only in the somewhat larger leaves and is

thus treated here as a synonym.

The discoloured leaves that are used to separate R. piceum from the other two

species may well be due to different drying techniques and are not of any taxonomic

value.

11.

R. kwangtungense Merrill & Chun, Sunyatsenia 1: 76 (1930). Type: China, Guang-

dong, Lokchang, 18 v 1929, Zo, Jing Lie (Tso, C.L.) 20627, n.v.

Syn.: R. fongkaiense C.N. Wu & P.X.Tan, Mat. Med. Guangdong 4:

34,

f.2 (1978). Type: China, Guangdong, Fongkai Xian,

Teng 11072 (holo. IBSC).

Shrub, to 2.5m; young shoots densely clothed with spreading strigose hairs and

stipitate glands. Leaves dimorphic, subcoriaceous; spring leaves lanceolate to oblong-

lanceolate, up to 8 x 2.5cm, c.3 x as long as broad, apex acuminate, base cuneate,

upper surface sparsely setose when young, soon glabrescent, lower surface pale,

sparsely setose, especially on midrib and veins; summer leaves 20-30 x 8-14mm,

otherwise as for spring leaves; petioles 2.5-4mm, setose. Inflorescence c.l2-flowered;

pedicels covered with strigose hairs and stipitate glands. Calyx c.l.5mm with broad

lobes,

long-ciliate. Corolla tubular-campanulate, white to pale purple, 20-22mm; tube

c.lOmm, cylindrical, glabrous. Stamens 5, glabrous. Ovary densely long-setose; style

glabrous. Capsule c.9mm long, setose.

China (Guangxi, Guangdong, Hunan). In thickets. Map 3.

12.

R. loniceriflorum P.X.Tan, Bull. Bot. Res. N.E. Forest. Inst. 2(4): 81, f.3 (1982).

Type: China, Fujian, Anxi Xian, Lutin, 20 iv 1974, L.G. Li (L.K. Lee) 740123 (holo.

Inst. Mat. Med. Fujian).

RHODODENDRON SUBGENUS TSUTSUSI 105

la: Tan, Survey Gen. Rhododendron S. China f.4 (1983).

Shrub;

young shoots covered with adpressed strigose hairs. Leaves dimorphic, cori-

aceous;

spring leaves lanceolate to oblong-lanceolate, 4.5-5.5 x

1.2-1.6cm,

c.3.5 x

as long as broad, apex acute, base narrowly cuneate, margin entire, revolute, upper

surface sparsely strigose, lower surface with a felted red-brown strigose indumentum;

summer leaves 15-20 x 5-7mm, otherwise as for spring leaves; petioles c.6mm,

densely strigose. Inflorescence 4-5-flowered; pedicels c.8mm, strigose. Calyx densely

strigose, lobes triangular, c.

1.5mm.

Corolla tubular-campanulate, pale reddish-purple,

c.35mm; tube 18-25 x 3mm at base, widening to 7mm below lobes, hairy within.

Stamens 5, puberulent in lower

half.

Ovary covered with reddish-brown strigose hairs;

style strigose at base. Mature capsule not known.

China (Fujian). Open woodlands. Map 3.

Closely allied to R. mariae but with larger corollas, the tubes of which are hairy

within.

13.

R. tenuilaminare P.X.Tan, Survey Gen. Rhododendron S. China 102, f.25 (1983).

Type:

China Guangdong: Conghua Xian, Rui-tin, in monte saxi calcarei, inter dumen-

tum, 14 iii 1973, S.Q Chen (S.H. Chun) 18485A (holo IBSC).

Shrub,

to lm; young shoots adpressed-sericeous. Leaves persistent, dimorphic, char-

taceous;

spring leaves oblong, 4.5-5 x

1.5-1.8cm,

c.3 x as long as broad, apex

mucronate, base cuneate, margin indistinctly crenulate-strigose, upper surface with

brown strigose hairs, lower surface paler, with adpressed strigose hairs, more dense

on midrib; summer leaves ovate to obovate, 20-26 x

10mm, otherwise as for spring

leaves;

petioles l-3mm, densely blackish-brown-strigose. Inflorescence 3-flowered;

pedicels 5-6mm, densely brownish-sericeous. Calyx 2mm, strigose, lobes obsolete.

Corolla funnel-campanulate, 32mm, rose-purple; tube 10 x 3-6mm, sparsely puberul-

ous.

Stamens 7, filaments puberulent below. Ovary densely strigose; style reddish-

pilose at base. Capsule c.9 x 5mm, densely grey-strigose.

China (Guangdong). Map 3.

The author compared this species with R. mariae but it is clearly distinct in the

shape of the corolla, etc.

14.

R. mariae Hance, J. Bot. 20:230 (1882). Type: China, Guangdong, circa coenobium

Fi-loi-tsz, ad angustias Tsing-un, fl. North River, 2 iv 1882, Henry (Hb. Hance 22025)

(holo.

BM).

Shrub l-3m; young shoots covered with adpressed flattened reddish-grey hairs. Leaves

dimorphic, coriaceous; spring leaves elliptic, 2-9.5 x l-4cm, 2-2.5 x as long as

broad, apex acute, mucronulate, base cuneate, margin entire, upper surface + gla-

brescent, lower surface with scattered adpressed rufous hairs; summer leaves obovate,

10-40 x 5-20mm, otherwise as for spring leaves; petioles 2-4mm, densely covered

with reddish strigose hairs. Inflorescence 7-12-flowered; pedicels 4-6mm, densely

strigose. Calyx minute, covered with shining red-brown hairs, lobes inconspicuous.

Corolla tubular-campanulate, lilac-pink, apparently without flecks, c.20mm, lobes

spreading; tube c.lOmm, c.3mm wide at base, c.4mm wide below lobes, glabrous.

106 EDINB.

BOT. 47(2)

Stamens

filaments glabrous. Ovary densely covered with shining rufous-brown

hairs;

style glabrous. Capsule ovoid,

6-8 x

c.2mm, densely strigose.

China (Guizhou, Guangxi, Guangdong, Hunan). Open scrub, stream-sides,

300m

(1450m

subsp. kwangsiense). Map

la. Leaves (4.5-)6-8

2-3.7cm; corolla tube c.lmm

base

14a.

subsp.

mariae

lb.

Leaves 4-5.5 x

1.5-1.8cm;

corolla tube c.2mm at

base

14b.

subsp.

kwangsiense

14a.

subsp.

mariae.

Syn.: R. papyrociliare P.X.Tan, Guihaia 3: 179 (1983). Type: China,

Guangxi, Singan Hsin (Xingan Xian), Guangxi PI. Exp. 583

(holo.

IBSC).

papyrociliare

is described as differing from subsp. mariae in its thinner leaves and

shorter calyx lobes. These two characters however, apparently vary independently

from one another.

14b.

subsp. kwangsiense (P.X.Tan) Chamberlain & Rae, comb, et stat. nov.

Syn.: R. kwangsiense [Hu ex] P.X. Tan, Survey Gen. Rhododendron

S. China 105, f.7 (1983). Type: China, Guangxi, Longsheng

Xian, 1450m, 31 iii 1955, Kwangfu Exp. 353 (holo. IBSC, iso.

KUN).

kwangsiense P.X.Tan var. salicinum Tan, loc. cit. (1983).

Type: China, Guangxi, Lingui Xian, 1952, C.F. Liang 30202

(holo.

IBSC).

kwangsiense P.X.Tan var. subfalcatum P.X.Tan, loc. cit.

(1983).

Type: sine loco, 13 vi 1928, R.C. Ching 5937 (holo.

IBSC).

kwangsiense P.X.Tan var. obovatifolium P.X.Tan, loc. cit.

(1983).

Type: China, Guangdong, Xinyi Xian,

193-1,

X.P. Gao

(S.P. Ko) 51190

(iso.

KUN).

We consider that the varieties described by Tan are not worthy of formal recog-

nition. Subsp.

kwangsiense

tends to have a more westerly distribution than does subsp.

mariae

but there is considerable overlap between the two subspecies.

mariae is allied to R. chrysocalyx and R.

meridionale

but generally has broader

leaves than either.

15.

R. cretaceum P.X.Tan, Survey Gen. Rhododendron

China

108,

f.9

(1983).

Type:

China, Guangdong, Rhuyuan Xian, 12 iv 1934, X.P. Gao (S.P. ko) 54106 (holo.

IBSC).

Shrub,

c.l.5m; young shoots adpressed-strigose at first, soon glabrescent. Leaves

dimorphic, chartaceous; spring leaves ovate, 4-5 x 2-2.3cm, c.2 x as long as broad,

RHODODENDRON SUBGENUS TSUTSUSI 107

apex acute to shortly acuminate, base cuneate, margin ciliate towards base, upper

surface initally adpressed-strigose, soon glabrescent, lower surface adpressed brown-

ish-strigose especially on midrib; summer leaves 12-18 x 10mm, otherwise as for

spring leaves; petioles 2-4mm, strigose. Inflorescence 5-6-flowered; pedicels 3-5mm,

reddish strigose. Calyx densely strigose, lobes c.3mm. Corolla funnel-campanulate,

white with red flecks, c.l6mm; tube c.9mm long, 5mm wide at base, hairy on outer

surface, tapering. Stamens 5, filaments glabrous. Ovary densely reddish-brown-stri-

gose;

style strigose at base. Capsule not known.

China (Guangdong). Woodland. Map 4.

Only known from the type. Superficially resembling R. mariae but differing in the

short, hairy corolla tube.

16.

R. subcerinum P.X.Tan, Bull. Bot. Res. N.E. Forest. Inst. 2(4): 88, t.l (1982).

Type: China, Guangdong, Yangchun Xian, Sian-Ja-Dong, in rimis rupium, 31 x 1935,

Huang Zhi {Wang, C.) 38590 (holo. IBSC).

Shrub; young shoots covered with adpressed densely brown strigose hairs. Leaves

dimorphic, coriaecous, clustered towards apex; spring leaves obovate to obovate-

elliptic, 4.5-5.5 x 2-2.5cm, apex abruptly acuminate to broadly mucronate, base

attenuate or narrowly cuneate, margin strongly revolute, upper surface green, yellow

when dried, midrib slightly raised, glabrescent, lower surface pale green, sparsely

strigose, midrib distinctly raised, with adpressed strigose hairs; summer leaves elliptic,

23 x 4-10mm, otherwise as for spring leaves; petioles 3-5mm, sparsely strigose.

Inflorescence c.6-flowered; pedicels 6-10mm, yellow-brown-strigose. Calyx cup-

shaped, lobes deltoid, strigose. Corolla funnel-campanulate, c.l9mm, red; tube 9 x

4mm. Stamens 5, unequal, exserted, filaments compressed-puberulous for the most

part. Ovary light brown strigose; style strigose in lower third. Capsule ellipsoid, 10mm,

brown-strigose.

China (Guangdong). Only known from the type. Map 4.

Allied to R. seniavinii, but with larger flowers.

17.

R. chrysocalyx Levl. & Van., Repert. Spec. Nov. Regni Veg. 2: 113 (1906).

Syntypes: Kouy-Tcheou (Guizhou), route de Mou-you-se a Tchen-Lin, vi 1904, Cava-

lerie 2059 (E); Pin-Fa bord des ruisseaux, 25 iv 1904, Cavalerie 1796 (E).

Syn.: R. spinigerum Levl., Bull. Acad. Geog. Bot. 24:251 (1914). Type:

Kouy-Tcheou (Guizhou), Hot a Pia Quay-Ho, 700m, 2 v 1912,

Esquirol 3560 (holo. E).

kouytchense Levl., Fl. Kouy-Tcheou 152 (1914), nom. nud.,

pro syn. sub. R. chrysocalyx.

xiushanense Fang in Acta Phytotax. Sin. 21:461 (1983). Type:

China, Sichuan, Xiushan, Baigeqiao, 370m, 17 v 1978, S.X.

Tan 354 (holo. SZ).

Deciduous or semi-evergreen shrub, to 2m; densely branched, branchlets with dense

coarse flat, yellowish-brown, adpressed hairs. Leaves persistent coriaceous, dimorphic,

lanceolate to oblanceolate; spring leaves 1.5-6 x 0.5-1.5cm, apex acute, base cuneate,

108 EDINB.

BOT. 47(2)

margin slightly crenulate, upper surface lustrous, glabrous except for

few coarse flat

adpressed hairs

the midrib, net-veins conspicuously impressed, lower surface with

few and similar hairs; summer leaves 5-10

3-5mm, otherwise

as for

spring leaves;

petioles 3-5mm, covered with adpressed flat yellowish-brown hairs. Inflorescence

(3-)6-12-flowered; pedicels 10-15mm, densely hairy. Calyx minute, hairy. Corolla

tubular-campanulate, rose, 20-30mm, glabrous; tube 7-15mm, 3mm wide

base.

Stamens

longer than corolla, papillate below middle. Ovary densely hairy, hairs

coarse, lustrous, yellowish-red, adpressed; style glabrous. Capsule ovoid, densely

hairy.

China (Guizhou,

Guangxi,

Hubei, SE Sichuan). Thickets, 700m. Map 4.

18.

meridionale P.X.Tan, Guihaia 2: 71,

t.4

(1982). Type: China, Guangxi, Fang-

cheng Xian, Nasuo,

5 iv

1956, Hopu

Exp.

2320 (holo. IBSC).

Shrub, 2-3m; young shoots covered with

adpressed-strigose hairs. Leaves dimor-

phic,

chartaceous; spring leaves narrowly lanceolate, 2-7.5

0.3-1.2cm,

c.6 x as

long

broad, apex acute, base cuneate, margin entire, ciliate, upper surface sparsely

strigose, lower surface paler, sparsely strigose, more densely

so on

midrib; summer

leaves 13-23

4-5mm, otherwise as for spring leaves; petioles c.lmm, strigose. Calyx

c.lmm, lobes minute, strigose. Corolla funnel-campanulate, lilac-purple, c.30mm; tube

c. 13mm,

5-6mm

wide at base, widening above, glabrous. Stamens 5, puberulent below.

Ovary densely strigose; style glabrous

strigose below. Capsule ovoid,

8-10mm

long,

strigose.

China (SW Guangxi). Map

la. Spring leaves 50-75mm long

18a.

var.

meridionale

lb.

Spring leaves not more than 20mm long

18b.

var.

minor

18a.

var.

meridionale.

Syn.: R.

meridionale

P.X.Tan. var. setistylum P.X.Tan, Guihaia

71,

t.4 (1982). Type: China, Guangxi, Fangcheng Xian, Shiwan-

dashan, 500-630m, 27 iii 1944, S.Q. Chen (S.H. Chun) 4811

(holo. IBSC).

Ic:

Tan, Survey Gen. Rhododendron S. China t.28 (1983).

18b.

var. minor P.X.Tan, Guihaia

2: 71,

t.4 (1982). Type: China, Guangxi, Kan Tung,

Miu Shan, N Luchen, 900m, 18 vi 1928, R.C.

Ching

6142 (holo. IBSC; iso. A, PE).

Closely allied to R. hainanense and perhaps conspecific, but differing in the ±

obsolete calyx, in the fewer (5) stamens and in the 5-6-flowered inflorescence. Most

of the material cited by Tan comes from Shiwanda Shan in Guangxi Prov. or close

to it. Typical R.

hainanense

also apparently occurs on the same mountain, and at least

one specimen {Ceng, H.D. 24778) from that locality is intermediate, with the small

calyx of R. meridionale, but the 3-flowered inflorescence and 7 stamens of R.

hainanense. Several of Tan's records of both species from Shiwanda Shan, refer to

fruiting specimens and are evidently identified on the basis of the presence or absence

RHODODENDRON SUBGENUS TSUTSUSI 109

of a large calyx. As there is no difference in the vegetative characters, in the absence

of flowers there must be some doubt as to the identity of these specimens.

Var. satistylum is distinguished by its strigose style base, a difference that we find

unconvincing. Var. minor has a distinctive appearance on account of its small leaves

and is maintained here, even though the type and only specimen seen lacks flowers.

18.*

R. longifalcatum P.X.Tan, Guihaia 2: 73, f.6 (1982). Type: China Guangxi,

Shangsi Xian, Shiwandashan, 200m, 8 iii 1944, S.Q. Chen (S.H. Chun) 4664 (holo.

IBSC).

Map 5.

Differs from R. meridionale in its apparantly thinner, oblong lanceolate leaves that

are more densely tomentose below, in its calyx with crenulate lobes and in its obovate

oblong corolla lobes.

Known only from the type. Tan separates R. meridionale from R. longifalcatum in

his key by the stamens being longer than the style.

19.

R. subflumineum P.X.Tan, Bull. Bot Res. N.E. Forest. Inst. 2(1): 94 (1982). Type:

China, Hunan, Mang Shan, 500m, 4 v 1957, L.H. Liu (L.H. Lau) 422 (holo. IBSC).

Shrub,

to 3m; young shoots densely adpressed brown-strigose, becoming pale greyish-

brown, sometimes glabrescent. Leaves crowded towards ends of branches, dimorphic,

coriaceous, elliptic-oblong; spring leaves 3.5-4.5 x

1.3-1.8cm,

apex shortly acute,

base cuneate, margin strigose, upper surface brown-strigose, lower surface silky reddi-

sh-brown-strigose; summer leaves smaller, oblong-lanceolate, 16-20 x 6-7mm, other-

wise as for spring leaves; petioles 4mm, densely brown-strigose. Inflorescence 5-6(-

8)-flowered; pedicels 10mm, densely brown-strigose. Calyx minute, strigose, lobes

crenulate. Corolla narrowly funnel-campanulate, 28mm, pinkish-red; tube 15mm,

glabrous. Stamens 8-9, puberulent to above middle. Ovary densely silky brown-

strigose; style glabrous. Capsule 7mm, ovoid, densely strigose.

China (N Guangdong, S Hunan). Riversides, 550m. Map 5.

Close to R. meridionale but more densely hairy and with 8-9 stamens.

20.

R. hainanense Merrill, Philipp. J. Sri.

21:

350 (1922). Type: China, Hainan, eastern

part of the Island, i 1921, K.L. Schaeffer (holo. K).

Shrub,

l-2m, with many erect twiggy branches; young shoots covered with flattened

brown adpressed hairs. Leaves monomorphic, subpersistent, subcoriaceous, lanceo-

late,

2-5 x 0.7-1.4cm, 3-6 x as long as broad, apex acute, base cuneate, margin

entire,

upper surface with scattered red-brown hairs and with midrib impressed, lower

surface glaucous, with scattered red-brown hairs, midrib covered with long shining

adpressed red-brown hairs; petioles 2-4mm, covered with adpressed red-brown hairs.

Inflorescence

1-3-flowered;

pedicels 2-3mm, covered with adpressed hairs. Calyx

densely pilose and ciliate, lobes lanceolate, 2-4mm. Corolla funnel-shaped, bright red,

20-30mm; tube c.l2mm, outer surface glandular, inner surface hairy. Stamens 10,

pubescent below. Ovary densely setose-pilose, style glabrous. Capsule ovoid, c.8mm

long.

110 . EDINB. J. BOT. 47(2)

China (Hainan Island, Guangxi). Mountain tops, thickets amongst rocks, rocks by

rivers, 500-1000m. Map 5.

Closely allied to

R.meridionale,

which may be conspecific.

21.

R. pulchroides Chung & Fang, Acta Phytotax. Sin. 6: 171 (1957). Type: China,

Guangxi, Lungsheng Hsien, Pingshui Hsiang Hungtan, 970m, 12 vi 1955,

Kwangfu

Exp.

536 (holo. SZ).

la: Acta Phytotax. Sin. 6, t.42 (1957).

Small

loosely branched

shrub,

aim, with short slender

branches;

young

shoots

clothed

with grey flattened hairs, becoming + glabrescent when older. Leaves deciduous;

spring leaves oblong-elliptic 2-2.5 x 0.6-0.8(-l)cm, 2.5-3.2 x as long as broad,

apex acute-apiculate, base cuneate, margins entire, ciliate, upper surface with lamina

glabrescent, indumentum ± persistent on midrib and lateral veins, lower surface ±

densely brownish-sericeous, indumentum more dense on midrib; petioles densely

villose.

Inflorescence

1-2-flowered;

pedicels c.lOmm, pilose. Calyx

5-6mm,

sericeous-

pilose.

Corolla

funnel-campanulate, 25-30mm, purplish red; tube 15mm, glabrous.

Stamens 10, filaments minutely pilose below. Ovary densely sericeous-pilose; style

glabrous.

Capsule

unknown.

China (N Guangxi). 970m. Map 5.

Known only from the type. Closely allied to R.

simsii

but generally more densely

hairy.

22.

R. oldhamii Maxim., Rhododendr. As. Orient. 34 (1870). Type: Taiwan, prope

Tansoy, 1884,

Oldham

212

(iso.

BM, K, PE).

Syn.: R.

oldhamii

Maxim, var.

glandulosum

Hayata in J. Coll. Sci.

Imp.

Univ. Tokyo

25:

153 (1908). Syntypes: Taiwan; Suizan,

in montibus Morrison, 7702ft, x 1905,

Nagasawa

668;

8000ft,

Nagasawa

2210; 9000ft, x 1906,

Nagasawa

1807; in montibus

centralibus, 10000ft, xi 1906,

Kawakami &

Mori 1860, omnes

n.v.

ovatosepalum

Yamamoto in

Soc.

Trop.

Agric.

5:405

(1933).

Type: Tawian,

Pref.

Shinchiku, iv 1918,

Stmada,

li.v.

la: Komatsu, Icon. PI. Koisikav. 2: t.119 (1914); Bot. Mag. 150: t.9059 (1924); Fl.

Taiwan

34 (1978).

Much-branched shrub, to 3m; young shoots densely clothed with spreading red-

brown glandular hairs intermixed with scattered + spreading, flattened hairs.

Leaves

dimorphic, persistent, chartaceous; spring leaves ovate-lanceolate 3.5-6 x

1.8-2.5cm,

2-2.4 x as long as broad, apex acute to mucronate, base rounded to broadly cuneate,

margin entire, covered with light brown long pilose hairs on both surfaces, hairs

somewhat longer on midrib; summer leaves 15-20 x

8-10mm,

otherwise as for

spring leaves; .petioles 4-9mm, covered with spreading pilose hairs.

Inflorescence

1-3-

flowered; pedicels 5-10mm, covered with spreading glandular red-brown

hairs.

Calyx

green, glandular-hairy and pilose, lobes ovate-lanceolate, c.2mm, ciliate. Corolla

funnel-shaped, 25—35mm, orange-red to coral-pink; tube c.l2mm, outer surface gla-

RHODODENDRON SUBGENUS TSUTSUSI 111

brous,

inner surface papillate. Stamens (8-)

10,

unequal, as long as or longer than

corolla,

filaments

papillate below middle.

Ovary

densely glandular-setose; style glab-

rous.

Capsule

ovoid,

8-10mm,

glandular-setose.

China (Taiwan). Sandstone cliffs etc., sea-level-2450m. Map 5.

A distinctive species with no close allies.

23.

R. taiwanalpinum Owhi, J. Jap. Bot. 13: 339 (1937). Type: Taiwan, Nankotaisan,

Ohwi 2580

(hole KYO, n.v.).

la: Proa Nat. Sci. Counc. 6: 28, f.18 (1973).

Shrub,

1-1.5m;

young shoots covered with adpressed brown hairs. Leaves mono-

morphic, subpersistent, coriaceous, ovate-oblong to oblong-lanceolate,

1.5—2(—3)

0.7-1.2(-1.8)cm, 1.7-2 x as long as broad, apex acute, mucronate, base cuneate,

margin entire, upper surface sparsely strigose, lower surface densely strigose; petioles

2-3mm, adpressed-strigose.

Inflorescence

(l-)2-3-flowered; pedicels

5-7mm,

densely

covered with reddish-brown hairs. Calyx densely reddish-brown-hirsute, lobes

rounded, l-2mm. Corolla broadly funnel-campanulate, 10-15(-20)mm long, 15-

20mm across, pink with rose

flecks;

tube 4-6mm, glabrous. Stamens 9-10, unequal,

filaments villose in lower

half.

Ovary

greyish-pubescent; style pubescent in lower

half.

Capsule

not known.

China (N Taiwan). Alpine meadows, 2800-3000m. Map 6.

Originally described as being allied to R.

oldhamii

but lacking the glandular indu-

mentum of that species.

The holotype cannot be located at

Kyoto.

Therefore our knowledge of this species

is based on a specimen that lacks

flowers

(Yamazaki et

al.

235) from the type locality.

24.

R. tashiroi Maxim., Bull. Acad. Imp. Sci. St. Petersb. 31: 64 (1887). Type: in

Japoniae australis ins. Tanega-sima,

Tashiro

(holo. LE, n.v.).

la: Stevenson (ed.), Sp. Rhodod. 122 (1930); Togashi et al., Species Rhododendron

Japan 122-128 (1982).

Branched shrub, 2-6m; young shoots covered with ± flattened weak brown hairs,

soon becoming glabrous.

Leaves

apparently monomorphic, persistent, 2-3 at apex of

branches, elliptic-obovate, 4.5-7 x

1.5-2.5cm,

apex acute, base cuneate, margin ±

entire, both surfaces at first clothed with adpressed grey-brown hairs, becoming

glabrous

above,

lower surface glabrous except along

midrib;

petioles

4-10mm, covered

with adpressed brown hairs.

Inflorescence

2-5-flowered; pedicels

8-15mm,

densely

clothed with strigose brown hairs. Calyx lmm, densely clothed with strigose brown

hairs.

Corolla

broadly funnel-campanulate, 25-40mm, pale rose-purple, sparingly

spotted. Stamens

10(—12),

glabrous.

Ovary

densely clothed with adpressed, flattened,

shiny brown hairs; style thickened towards apex, glabrous.

Capsule

8-12mm,

clothed

with flattened brown hairs.

Japan (Liukiu and Kawanabe Islands, Yakushima, Kyushyu), S Taiwan?. Evergreen

forests, on slopes, 0-500m. Map 7.

The hybrid between R.

tashiroi

and R.

reticulatum

has been named R. x tak-

amashanianum

Sugimoto (/.

Geobot.

22: 53, 1975).

112 EDINB. J. BOT. 47(2)

25.

R. kanehirai Wilson in Wilson & Rehder, Monogr. Azaleas 28 (1921). Type:

Taiwan, prov. Taihoku, Urai, in a garden at the police station, 1 iv 1918, Wilson

10276,

n.v.

la: The Rare and Threatened Plants of Taiwan 1: 78 (1980).

Much-branched shrub, l-2.5m; young shoots densely clothed with adpressed broad

flattened

stiff,

persistent chestnut-brown hairs. Leaves dimorphic, persistent; spring

leaves oblanceolate to narrowly obovate, 2-5 x 0.5-1.5cm, apex acute, gland-tipped,

base cuneate, margin entire, both surfaces sparsely strigose, especially on midrib;

summer leaves 15-30 x 2-6mm, otherwise as for spring leaves; petioles 2-5mm,

densely strigose.

Inflorescence

l(-2)-flowered; pedicels

5-8mm,

densely chestnut-stri-

gose.

Calyx c.lmm, indumentum as for pedicels.

Corolla

funnel-campanulate, 25-

40mm, pink (or carmine to scarlet); tube 15-25mm, glabrous. Stamens 10, as long as

corolla, unequal, filaments papillose below middle.

Ovary

densely clothed with grey

or chestnut-brown strigose hairs; style glabrous or with a few adpressed hairs at base.

Capsule

cylindric-oblong, c.lOmm long.

China (N Taiwan). 400m. Map 6.

Apparently closely allied to R.

tashiroi

from the southern islands of Japan and

possibly conspecific. Wilson originally described the

flower

colour as being scarlet or

carmine; later authors have suggested that it is pink. Also allied to R.

indicum

but

differing in the number of

stamens,

etc.

26.

R. scabrum G. Don, Gen. Syst. 3: 846 (1834). Type not designated.

Loosely branched shrub, l-2m; young shoots covered with adpressed grey-brown

hairs that gradually disappear.

Leaves

persistent, coriaceous, dimorphic; spring leaves

elliptic to lanceolate, 3-9 x 2-3.5cm,

(1.5—)2—3.2

x as long

broad, apex

acute,

base

broadly cuneate, margin entire to subcrenulate, ciliate, both surfaces with scattered

adpressed pilose hairs, lower surface paler than upper; summer leaves elliptic to

lanceolate, 30-40 x 10-15mm, apex acute to rounded and mucronulate, otherwise

as for spring

leaves;

petioles 2-4mm, stout,

flattened,

covered with adpressed flattened

grey-brown strigose

hairs.

Inflorescence

2-6-flowered; pedicels

10mm,

densely fulvous-

strigose hairs glandular or eglandular. Calyx covered with adpressed grey pilose or

glandular-pilose hairs, lobes oval, rounded, c.5mm.

Corolla

broadly funnel-shaped,

45-60mm long, c.50mm across, rose-red to scarlet, with dark flecks on upper lobes;

tube .15-20mm, glabrous. Stamens 10, shorter than corolla, filaments pilose below

middle.

Ovary

eglandular- or glandular-pilose; style glabrous.

Capsule

ovoid c.lOmm,

sparsely hairy.

la. Pedicels, calyx and ovary eglandular-pilose _ 26a. subsp. scabrum

lb.

Pedicels, calyx and ovary glandular-pilose

26b. subsp.

amanoi

26a. subsp.

scabrum.

Syn.: R. maximum sensu Thunberg, Fl. Japan 181 (1784), non L.

(1753).

indicum Sweet var. sinensis Miquel, Ann. Mus. Lugduno-

RHODODENDRON SUBGENUS TSUTSUSI 113

Batavum 1: 33 (1863). Type: Japan, locis clivosis, Thunberg,

Siebold,

Burger, n.v.

sublanceolatum

Miquel, Ann. Mus. Lugduno-Batavum 2:

163 (1866); R. indicum Sweet var.

sublanceolatum

(Miquel)

Makino, Bot. Mag. Tokyo 18: 100

(1904).

Type not known.

sublateritium

Komatzu, Bot. Mag. (Tokyo) 32: 12 (1918).

Type not known.

liukiuense

Komatzu, loc cit. (1918). Type not known.

? R.

yakuinsulare

Masamune, Trans. Trop. Agric. 2: 38 (1930);

R. simsii Planchon

var.

yakuinsulare

(Masamune) Yamazaki,

J. Jap. Bot.

49:

272 (1974). Type not known.

scabrum

G.Don f.

linearisepalum

Sugimoto, J. Geobot. 22:

52 (1975). Type not known.

la: Bot. Mag. 139: t.8478 (1913); Togashi et al., Species Rhododendron Japan 130-

132(1982).

Japan (Ryukyu Islands). In open forest. Map 8.

In Ohwi & Kitagawa

{New Flora

Japan:

1157, 1983) R.

yakuinsulare

is mentioned

under R.

scabrum

and there is no entry for R.

simsii.

Since we have seen neither the

type specimen nor the original description we are uncertain of the true status and

affinities of

this

taxon.

26b.

subsp. amanoi (Owhi) Chamberlain & Rae, comb, et stat. nov.

Syn.: R.

amanoi

Owhi, Bull. Nat. Sci. Mus. Tokyo n.s. 1,1: 4 (1954).

Type: Japan, Ryukyu, Ins. Iriomote, Inaba, secundum fluvii

Uranchi,

vi 1953, T. Amano 7185, n.v.

la: Togashi et-al., Species Rhododendron Japan 134-137 (1982).

Japan (S Ryukyu Islands). Map 8.

Subsp.

amanoi

apparently differs in its glandular indumentum and slightly smaller

flowers. Furthermore, it replaces subsp.

scabrum

in the Southern Ryukyu Islands.

27.

R. macrosepalum Maxim., Rhododendr. As. Orient. 31 (1870). Type; two plants

cultivated by Maximovicz, originating in Japan, 'in alpe altissime Nikkoo' (n.v.).

Syn.: R.

linearifolium

Sieb.

Zucc.

var.

macrosepalum

(Maxim.) Mak-

ino,

Bot. Mag. (Tokyo)

27:

108 (1913).

hortense

Nakai in Nakai & Koidz., Trees Shrubs Japan ed.

1:122(1922).

la: Gartenflora 19:t.

662

(1870);

S. Okuyama, Coloured Illust. Wild

PI.

Japan

t.25,

f.2

(1960);

Togashi et al., Species Rhododendron Japan 186-189 (1982).

Low shrub, 0.3-1 m; young shoots covered with greyish spreading-pilose, sometimes

glandular

hairs,

also with a few

bristles.

Leaves

dimorphic,

+ deciduous, chartaceous;

spring leaves ovate-elliptic, 2.5-7 x

1.5-2.5cm,

1.7-2.5

x as long as broad, apex

acute, base cuneate, margin entire, upper surface sparsely glandular-pilose, lower

surface more densely

pilose,

with a few setose hairs on midrib and main

veins;

summer

114 EDINB. J. BOT. 47(2)

leaves oblanceolate, 12-20 x 3-6mm, otherwise as for spring

leaves;

petioles c.5mm,

densely pilose, also with a few flattened spreading setae.

Inflorescence

2-10-flowered;

pedicels 10-25mm, covered with long spreading pilose, partly glandular hairs. Calyx

glandular-pilose, lobes lanceolate to broadly oblong, 15-3Omm.

Corolla

broadly fun-

nel-shaped, lilac-pink to rose-purple, with purple flecks on upper

lobe,

35-5Omm; tube

15-20mm, glabrous. Stamens 5(-7), slightly shorter than corolla, filaments pubescent

below middle. Ovary glandular-setose, style glabrous.

Capsule

ovoid, c.lOmm, setose.

Japan (Honshu, Shikoku). Thickets, open forest, 150-400m. Map 9.

Possibly hybridizing with R. kaempferi (q.v.). R.

macrosepalum

may be the wild

species from which R.

linearifolium

is derived.

27*.

R. x enomotoi Yamazaki, J. Jap. Bot. 51: 31 (1976)—R.

macrosepalum

x R.

indicum. Type: Japan, Prov. Aichi, Kitashidara-gun, cult., 27 v 1974, F. Yamazaki

974 (holo. TI, n.v.).

This hybrid will key down to R.

macrosepalum

but differs in its smaller, 5-7mm,

calyx, etc.

28.

R. yedoense Maxim, in Regel, Gartenflora

35:

565,1.1233

(1886).

Type: a cultivated

plant exhibited in St Petersburg in 1884, originating from Japan

[n.v.],

or the plate

cited above.

Compact densely branched shrub, l-2m; young shoots clothed with adpressed flat-

tened strigose hairs, glabrescent in second year. Leaves dimorphic, + deciduous,

chartaceous; spring leaves elliptic-lanceolate to oblanceolate, 3-8 x l-2.5cm, 2-3 x

as long as broad, apex acute and mucronate, base cuneate, margin entire, ciliate, both

surfaces with scattered adpressed shining brown strigose hairs, lower surface paler

than upper; summer leaves thicker, upper surface soon glabrescent, otherwise as

for spring leaves; petioles 3-6mm, covered with loosely adpressed strigose hairs.

Inflorescence

2-3-flowered, flowers opening with or shortly before the leaves; pedicels

5-10mm, covered with loosely adpressed strigose hairs. Calyx green, covered with

adpressed strigose hairs, lobes ovate, acute or obtuse, 5-8mm.

Corolla

broadly funnel-

shaped, 35-40mm, 50mm across, rose to pale lilac-purple (sometimes double in cul-

tivated varieties), with flecks, fragrant, lobes c.25mm; tube glabrous. Stamens 10,

subequal, shorter than corolla, filaments papillose below middle. Ovary densely

covered with adpressed hairs; style glabrous or pilose towards base.

Capsule

ovoid,

5-8mm, densely strigose, with persistent calyx.

la. Flowers double; calyx to 15mm (cultivated) 28a. var

yedoense

lb.

Flowers single; calyx 5-8mm (native)

28b.

var

poukhanense

28a.

var.

yedoense.

Known only in cultivation.

RHODODENDRON SUBGENUS TSUTSUSI 115

28b.

var. poukhanense (Levl.) Nakai, Bot. Mag. (Tokyo)

274, Jap. (1920).

Syn.: R.

poukhanense

Levl., Repert. Spec. Nov. Regni Veg. 5: 100

(1908).

Type: Korea, in acre Pouk Han, 3 vi

1901,

Faurie

s.n.

(holo.

E).

hallaisanense

Levl., Repert. Spec. Nov. Regni Veg. 12: 101

(1913);

yedoense

Maxim, var.

hallaisanense

(Levl.) Yama-

zaki, J. Jap. Bot. 62: 260(1987). Type Korea, Quelpaert, Hal-

laisan, 1200m, x 1907,

Taquet

305 (holo. E).

coreanum

Rehder, Mitt. Deutsch. Dendrol. Ges. 22: 259

(1913).

Type: a cultivated specimen flowering in the Arnold

Arboretum on 6 v 1911, raised from seed collected by J.G.

Jack in Korea, Pack Han, Seoul, on 25 ix 1905 (n.v.).

la: Togashi et al, Species Rhododendron Japan 182-184 (1982).

Korea, Japan (Tsushima), native. Rocky ground among shrubs, c.l

100m.

Map 10.

Probably most closely allied to R.

mucronatum.

29.

R. simsii Planchon, Fl. des Serres 9:78 (1854). Based on Azalea

indica

sensu Sims,

Bot. Mag. 35: t.1480 (1812), non L. (1753). Type: a plant grown by James Vere in

1812 near London, or the plate cited.

Much-branched twiggy shrub, l-3m; young shoots densely covered with adpressed

flattened shining brown strigose hairs; bud scales viscid on inner surface. Leaves

dimorphic, chartacerous; spring leaves ovate-lanceolate to linear-elliptic, 3-7 x

(0.6-)l-2cm, (2-)2.5-4(-7) x as long as broad, apex acute, base cuneate, margin

entire, upper surface sparingly adpressed-strigose, lower surface paler, more densely

strigose, especially on the midrib and veins; summer leaves elliptic to oblong-elliptic,

10-20 x 5—10mm, apex often rounded, otherwise as for spring leaves; petioles 3-

6mm, covered with adpressed red-brown strigose hairs.

Inflorescence

2-6-flowered;

pedicels 5-10mm, densely strigose. Calyx strigose; lobes ovate-lanceolate, 3-7mm,

ciliate, apex blunt.

Corolla

broadly funnel-shaped, 25-60mm, white to dark

red,

upper

lobes with darker

flecks;

tube 7-33mm, glabrous.

Stamens

(8-)

10,

as long as corolla,

filaments pubescent below middle. Ovary densely strigose; style strigose at base.

Capsule

5-10mm, strigose.

la. Corolla rich red to carmine, 35-60mm long 29a. var. simsii

lb.

Corolla white to rose-pink, 25-40mm long 29b. var. mesembrinum

29a. var. simsii.

Syn.: R.

indicum

Sweet var.

ignescens

Sweet, Brit. Fl. Garden ser. 2,2:

t.128 (1833). Type: the plate cited, painted from a specimen

that originated from China.

calleryi Planchon,

Fl.

des Serres

9:81

(1854).

Syntypes:

China,

Callery

50, 150 (P, n.v.);

Fortune

72 (P, n.v.).

indicum

Sweet var. simsii (Planchon) Maxim. Rhododendr.

As.

Orient. 38 (1870).

114 EDINB. J. BOT. 47(2)

leaves oblanceolate, 12-20 x 3-6mm, otherwise as for spring leaves; petioles c.5mm,

densely pilose, also with a few flattened spreading setae.

Inflorescence

2-10-flowered;

pedicels 10-25mm, covered with long spreading pilose, partly glandular hairs. Calyx

glandular-pilose, lobes lanceolate to broadly oblong, 15-30mm.

Corolla

broadly fun-

nel-shaped, lilac-pink to rose-purple, with purple

flecks

on upper

lobe,

35-50mm; tube

15-20mm, glabrous. Stamens 5(-7), slightly shorter than corolla, filaments pubescent

below middle. Ovary glandular-setose, style glabrous.

Capsule

ovoid, c.lOmm, setose.

Japan (Honshu, Shikoku). Thickets, open forest, 150-400m. Map 9.

Possibly hybridizing with R. kaempferi (q.v.). R.

macrosepalum

may be the wild

species from which R.

linearifolium

is derived.

27*.

R. x enomotoi Yamazaki, J. Jap. Bot. 51: 31 (1976)—R.

macrosepalum

x R.

indicum. Type: Japan, Prov. Aichi, Kitashidara-gun, cult., 27 v 1974, F. Yamazaki

974 (holo. TI, n.v.).

This hybrid will key down to R.

macrosepalum

but differs in its smaller, 5-7mm,

calyx, etc.

28.

R. yedoense Maxim, in Regel, Gartenflora

35:

565,1.1233 (1886). Type: a cultivated

plant exhibited in St Petersburg in 1884, originating from Japan

[n.v.],

or the plate

cited above.

Compact densely branched shrub, l-2m; young shoots clothed with adpressed flat-

tened strigose hairs, glabrescent in second year. Leaves dimorphic, + deciduous,

chartaceous; spring leaves elliptic-lanceolate to oblanceolate, 3-8 x l-2.5cm, 2-3 x

as long as broad, apex acute and mucronate, base cuneate, margin entire, ciliate, both

surfaces with scattered adpressed shining brown strigose hairs, lower surface paler

than upper; summer leaves thicker, upper surface soon glabrescent, otherwise as

for spring leaves; petioles 3-6mm, covered with loosely adpressed strigose hairs.

Inflorescence

2-3-flowered, flowers opening with or shortly before the leaves; pedicels

5-10mm, covered with loosely adpressed strigose hairs. Calyx green, covered with

adpressed strigose hairs, lobes ovate, acute or obtuse, 5-8nim.

Corolla

broadly funnel-

shaped, 35-40mm, 50mm across, rose to pale lilac-purple (sometimes double in cul-

tivated varieties), with flecks, fragrant, lobes c.25mm; tube glabrous. Stamens 10,

subequal, shorter than corolla, filaments papillose below middle. Ovary densely

covered with adpressed hairs; style glabrous or pilose towards base. Capsule ovoid,

5-8mm, densely strigose, with persistent calyx.

la. Flowers double; calyx to 15mm (cultivated) 28a. var

yedoense

lb.

Flowers single; calyx 5-8mm (native)

28b.

var

poukhanense

28a.

var.

yedoense.

Known only in cultivation.

RHODODENDRON SUBGENUS TSUTSUSI 115

28b.

var. poukhanense (Levl.) Nakai, Bot. Mag. (Tokyo)

274, Jap. (1920).

Syn.: R.

poukhanense

Levl., Repert. Spec. Nov. Regni Veg. 5: 100

(1908).

Type: Korea, in acre Pouk Han, 3 vi

1901,

Faurie

s.n.

(holo.

E).

hallaisanense

Levl., Repert. Spec. Nov. Regni Veg. 12: 101

(1913);

yedoense

Maxim, var.

hallaisanense

(Levl.) Yama-

zaki, J. Jap. Bot. 62: 260(1987). Type Korea, Quelpaert, Hal-

laisan, 1200m, x 1907,

Taquet

305 (holo. E).

coreanum Rehder, Mitt. Deutsch. Dendrol. Ges. 22: 259

(1913).

Type: a cultivated specimen flowering in the Arnold

Arboretum on 6 v 1911, raised from seed collected by J.G.

Jack in Korea, Pack Han, Seoul, on 25 ix 1905 (n.v.).

la: Togashi et al, Species Rhododendron Japan 182-184 (1982).

Korea, Japan (Tsushima), native. Rocky ground among shrubs, c.l

100m.

Map 10.

Probably most closely allied to R.

mucronatum.

29.

R. simsii Planchon, Fl. des Serres 9:78 (1854). Based on Azalea

indica

sensu Sims,

Bot. Mag. 35: t.1480 (1812), non L. (1753). Type: a plant grown by James Vere in

1812 near London, or the plate cited.

Much-branched twiggy shrub, l-3m; young shoots densely covered with adpressed

flattened shining brown strigose hairs; bud scales viscid on inner surface. Leaves

dimorphic, chartacerous; spring leaves ovate-lanceolate to linear-elliptic, 3-7 x

(0.6-)l-2cm, (2-)2.5-4(-7) x as long as broad, apex acute, base cuneate, margin

entire, upper surface sparingly adpressed-strigose, lower surface paler, more densely

strigose, especially on the midrib and

veins;

summer leaves elliptic to oblong-elliptic,

10-20 x 5—10mm, apex often rounded, otherwise as for spring leaves; petioles 3-

6mm, covered with adpressed red-brown strigose hairs.

Inflorescence

2-6-flowered;

pedicels 5-10mm, densely strigose. Calyx strigose; lobes ovate-lanceolate, 3-7mm,

ciliate, apex blunt.

Corolla

broadly funnel-shaped, 25-60mm, white to dark

red,

upper

lobes with darker

flecks;

tube 7-33mm, glabrous.

Stamens

(8-)

10,

as long as corolla,

filaments pubescent below middle. Ovary densely strigose; style strigose at base.

Capsule

5-10mm, strigose.

la. Corolla rich red to carmine, 35-60mm long 29a. var. simsii

lb.

Corolla white to rose-pink, 25-40mm long

29b.

var. mesembrinum

29a. var. simsii.

Syn.: R.

indicum

Sweet var.

ignescens

Sweet, Brit. Fl. Garden ser. 2,2:

1.128 (1833). Type: the plate cited, painted from a specimen

that originated from China.

R.calleryi Planchon,

Fl.

des Serres

9:81

(1854).

Syntypes: China,

Callery

50, 150 (P, n.v.);

Fortune

72 (P, n.v.).

indicum

Sweet var.

simsii

(Planchon) Maxim, Rhododendr.

As.

Orient. 38 (1870).

116 EDINB. J. BOT. 47(2)

indicum

Sweet

vax.formosanum

Hayata, Icon. PI. Formosan.

134 (1913). Type: Taiwan, Kusukusu, iii 1898, C.

Owarari,

n.v.

annamense

Rehder, J. Arnold Arb. 10:182

(1929).

Type:

Viet-

nam, prov. Thua-Thien, Hue, i-iv 1927,

Squires

94 (iso. BM,

E, K).

bicolor

P.X.Tan, Survey Gen. Rhododendron S. China 101

(1983).

Type

China, Guangdong, Conghua Xian, Rui-tin, 16

iii 1973, S.Q.

Chen

(S.H.

Chun)

18492 (holo. IBSC).

viburnifolium

W.P.

Fang, Acta Phytotax. Sin.

21:

469 (1983).

Syntypes: China, Sichuan, Hejiang, Fubaolinchang, Jiaozi

Shan, 680-1750m, 20-25 v 1981, D.W. Liao et al. 1-63 (syn.

SZ);

3-28 (syn. SZ); 4-2, n.v.

Ne Upper Burma, China (widespread in W, C, S & E), Hongkong, S Taiwan, Laos,

Thailand, S Japan (Ryukyu Is.). Open woodland, amongst scrub, often near water,

600-2700m. Map 6.

There is some doubt as to the identity of the type of R.

simsii

as the plate cited is

atypical in its narrowly lanceolate calyx lobes and in its hairy corolla. It is not clear

whether the type had a spreading or adpressed indumentum on its young shoots.

However, in other respects it matches our concept of

var.

simsii.

annamense

is a narrow-leaved form (leaves 4-7 x as long as broad) that occurs

sporadically with the typical broad-leaved form in Laos, Vietnam, S China, and NE

Burma

(Kingdon-Ward

1792, 3007, 5568, 6607 & 22036). This form is not formally

recognized as there is no clear demarcartion between it and var.

simsii

sensu stricto.

The type of

bicolor has

relatively small

flowers

but within the range of var.

simsii.

The bicoloured nature of the stamens mentioned in the type description may by an

artifact due to drying conditions.

We can see no reason for maintaining R.

viburnifolium

as distinct from var.

simsii.

29b.

var. mesembrinum

[Balf.

f. & Forrest ex] Rehder in Stevenson (ed.), Species

Rhododendron 105 (1930).? Lectotype: China, Yunnan, Jang-tzow Shan, Shweli-

Salween Divide, 2500m, v 1919,

Forrest

17914 (holo. E).

Ne Upper Burma, China (Yunnan). Forest margins, etc. 1800-2700m. Map 6.

Close to var.

simsii

but with a more restricted distribution; differing in its generally

smaller and paler flowers.

simsii is cultivated widely in the warm temperate parts of E Asia and many

cultivars are known. R.

vittatum

(Fortune) Planchon

(R.

simsiiVar.

vittatum

(Fortune)

Wilson) is one of these cultivated forms with flowers white striped lilac-purple,

occasionally with individual

flowers

that are pure white or lilac-purple.

The purple-flowered R.

bellum

from Guangxi Province will probably key down to

simsii

(see p. 115).

30.

R. mucronatum (Blume) G. Don, Gen. Syst.

846

(1834).

Type:

'e regno Chinensi

allata', n.v.

RHODODENDRON SUBGENUS TSUTSUSI 117

Syn.:

Azalea mucronata

Blume, Bijdr. 853 (1826).

Shrub, l-2m; young shoots densely clothed with loosely adpressed flattened strigose

hairs intermixed with softer grey-brown, sometimes glandular, pilose hairs. Leaves

dimorphic, chartaceous; spring leaves ovate-lanceolate, 3.5-5 x

1.5-2cm,

2-2.5 x as

long as broad, apex acute or obtuse, mucronate, base cuneate, margin entire, both

surfaces clothed with adpressed reddish-grey pilose hairs, especially on midrib; sum-

mer leaves oblanceolate, 15-30 x 5-10mm, c.3 x as long as broad, otherwise as for

spring leaves; petioles 3-5mm, densely clothed with spreading flattened strigose and

softer pilose hairs.

Inflorescence

1-3-flowered;

pedicels 10-15mm, clothed with soft

spreading pilose, sometimes glandular and flattened, strigose hairs. Calyx glandular-

pubescent, lobes lanceolate, up to 15mm long, often slightly erose.

Corolla

widely

funnel-shaped, white to rose-pink or

red,

25-50mm; tube 12-25mm,

glabrous.

Stamens

10,

c. as long as corolla, papillate below middle.

Ovary

setose;

style glabrous.

Capsule

conic-ovoid, c.5mm long.

la. Flowers white (only known in cultivation) 30a. var. mucronatum

lb.

Flowers rose-pink (native in S Japan)

30b. var. ripense

30a. var. mucronatum.

Syn.:

Azalea rosmarinifolia

Burmann, Fl. Ind.

43, t.3,

f.3 (1768); Rho-

dodendron rosmarinifolium

(Burmann) Dippel, Handb. Laub-

holzk. 1: 421 (1889), non Vidal (1886). Type: 'habitat in

Japonia colitur in Java', cult., n.v.

ledifolia

Hooker, Bot. Mag. 56: t.2901 (1829);

Rhododendron

ledifolium

(Hooker) G. Don, Gen. Syst.

3:846

(1834). Type

presumed to be the plate cited.

liliiflora

Poiteau, Annal. de From. 104 (1829). Type not

designated.

Rhododendron leucanthum

Bunge, Mem. Acad. Imp. Sci. St.

Petersbourg Divers Savans 2: 115 (1833). Type: in frigidis

Pekingensis colitur, ii

1831,

Bunge,

n.v.

burmannii

G. Don, loc. cit. (1834).

argyi Levl., Repert. Spec. Nov. Regni Veg. 12: 102 (1913).

Type: China, Jiangxi, Long-se, Long Chien, Vou-Sie, 20 iv

1863,

d'Argy

(holo.

E).

Var.

mucronatum

is the widely cultivated white form of the species. It may occur in

the wild as the albino form of var.

ripense.

30b.

var.

ripense

(Makino) Wilson in Wilson & Rehder, Monogr. Azaleas 72 (1921).

Syn.: R.

ripense

Makino, Bot. Mag. (Tokyo) 22: 55 (1908). Syntypes:

Japan, Prov. Tosa, Ochi, side of River Niyodo, 1884, 1885,

1889,

Makino, n.v.; Prov. Iyo, Shingu, side of River Dozan-

gawa,

1893,

Makino, n.v.

Ic:

Togashi et al., Species Rhododendron Japan 174-176 (1982).

118 EDINB. J. BOT. 47(2)

Japan (SW Honshu, Shikoku, NE Kyushyu). Rocks by streams, etc. Map 11.

Closely allied to R.

macrosepalum

but differing in the smaller leaves, adpressed-

hairy shoots, etc. Widely cultivated, with many distinct garden forms, of which one

is represented by the type of var.

mucronatum.

These have almost certainly been

derived from var.

ripense,

a native of

Japan.

31.

R. boninense Nakai, Bot. Mag. (Tokyo)

34:

324, Jap. (1920). Type: Japan, Bonin

Islands, T. Nakai

Toyoshima,

n.v.

la: Toyoda, Fl. Bonin Is. 174 (1981); Togashi et al., Species Rhododendron Japan

138-140(1982).

Much-branched shrub, to 2m; young shoots covered with adpressed rufous hairs.

Leaves persistent, monomorphic, oblong-lanceolate, 2-5 x l-2cm, apex subacute,

mucronulate, base cuneate, upper surface sparsely covered with adpressed straight

rufous hairs, lower surface with impressed veins and densely covered with adpressed

straight rufous hairs; petioles 5-10mm, channelled above, indumentum as for leaves.

Inflorescence

4-6-flowered; pedicels 4-6mm, covered with adpressed rufous hairs and

subtended by the sub-persistent bud-scales. Calyx with 5 minute acute or rounded

teeth covered with adpressed rufous hairs.

Corolla

funnel-campanulate, white, 40-

50mm long and as wide. Stamens 10, papillose below middle.

Ovary

densely covered

with adpressed strigose hairs; style pilose below middle.

Capsule

10-20mm, oblong-

ovoid, covered with grey-brown hairs.

Japan (Bonin Islands). Map 8.

This is the only

Rhododendron

found in the Bonin Islands. It grows on the cliffy

summit of

Tsutsyiyama.

The foliage resembles that of

simsii

and the

flowers

those

of R.

mucronatum.

32.

R. eriocarpum (Hayata) Nakai, Trees Shrubs Japan

ed.

1,1:97

(1922).

Type:

Japan,

Liukiu, Nakanoshima, 2 viii 1910, Hayata 96 (holo. TI).

Syn.: R.

indicum

Sweet var.

eriocarpum

Hayata, Icon. PI. Formosan.

134(1913).

indicum

Sweet var.

tamurai

[sphalm. pro

iamurae]

Makino in

Bot. Mag. Tokyo 18:

102,103,

t. (1904); R.

tamurae

(Makino)

Masamune, Prelim. Rep. Veg. Yakus. 106 (1929) & Mem.

Sci.

Agric. Taihoku Imp. Univ. Bot. 11(4): 349 (1934). Type:

Japan, Tokyo, cult., vi 1904, Makino, n.v.

eriocarpum

(Hayata) Nakai var.

tawadae

Ohwi in Bull. Nat.

Sci.

Mus. Tokyo n.s. 1: 4 (1954); R.

tawadae

(Ohwi) Ohwi. J.

Jap.

Bot. 29: 369 (1954). Type: Japan, Ryukyu, vertice M.

Uwotsuridake ins. Uwotsuri, 300-320m, 17 iv 1953; Tawada

29,

n.v.

la: Togashi et al., Species Rhododendron Japan 147-150 (1982).

Dwarf shrub, to at least 0.4m; young shoots densely covered with broad flattened

brown adpressed hairs.

Leaves

monomorphic, persistent, subcoriaceous, obovate to

RHODODENDRON SUBGENUS TSUTSUSI 119

elliptic,

1.7-2.5

1-1.5cm,

c. 1.7 x as long as broad, apex bluntly mucronate, base

broadly cuneate, margin entire, upper and lower surfaces strigose, especially on

midrib; petioles 2-5mm, densely adpressed-strigose.

Inflorescence

1-2-flowered;

pedi-

cels c.lOmm, densely adpressed-strigose. Calyx adpressed-strigose, lobes broadly

ovate, 2-3mm.

Corolla

broadly funnel-campanulate, white to purplish pink, with

darker flecks, c.30mm; tube c.l5mm, glabrous. Stamens c.9, papillate below. Ovary

strigose; style glabrous.

Capsule

7-1 Omm.

Japan (Kyushyu, Ryukyu Islands). Thickets, open woodland, c.300m. Map 12.

Contrary to Ohwi's most recent statement in the new edition of his

Flora

of Japan,

we are convinced that R. tamurae is a synonym of R.

eriocarpum.

tawadae

described

having small reddish-purple flowers; this agrees better with R.

eriocarpum

than it does with R.

simsii,

with which it has been synonymized in the past.

33.

R. longiperulatum Hayata, Icon. PL Formosan. 3: 138 (1913). Type: Taiwan, Mt

Daiton, viii 1910, Shimada, (holo. TI).

Erect shrub, young shoots densely clothed with adpressed flattened hairs. Leaves

dimorphic, sub-persistent, chartaceous; spring leaves ovate to ovate-lanceolate, 1-3

x 0.5-1.5cm, 1.7-2 x as long as broad, apex acute, base cuneate, margin entire,

upper surface sparsely strigose, lower surface densely strigose, especially on midrib

and veins; summer leaves up to 10 x 6mm, otherwise as for spring

leaves;

petioles 1-

2mm, strigose.

Inflorescence

1-3-flowered;

pedicels c.l2mm, stout, densely clothed

with shining adpressed rufous

hairs.

Calyx indumentum as for pedicels, lobes c.2mm,

acute.

Corolla

funnel-shaped, scarlet, c.30mm; tube c.20mm.

Stamens

9-10, included

within

tube,

sparsely

pilose

towards

base.

Ovary

densely

pilose;

style

glabrous.

Capsule

pubescent,

8-15mm

long.

Taiwan. Grasslands, 700-1000m. Map 14.

Apparently allied to R.

kanehirai

but differing in its shorter, broader leaves and

smaller flowers.

34.

R. indicum (L.) Sweet, Brit. Fl. Garden ser. 2,2: t.128 (1833).

Syn.: Azalea indica L., Sp. PL 150 (1753)—based on 'Chamae-

rhododendron exoticum, amplissimis

floribus

lilaceis' of Brey-

nius(Prodr.

1:23,1680).

macrantha

Bunge, Mem. Soc. Etr. Acad. Sci. St. Petersb. 2:

115 (1833). Described from China, Beijing.

indica

L. var.

lateritia

Lindley, Edward's Bot. Reg. 20: t.1700

(1834).

Type: a plant originating in China, cultivated by Mr

Knight (or the plate drawn from it).

Rhododendron decumbens

[D.

Don

ex]

G. Don, Gen Syst. 3: 846

(1834).

Described from a plant grown by Knight & Tate,

originally from China.

Azalea

danielsiana

Paxton, Mag. Bot. 1: t.129 (1834). Type: the

plate

cited,

of a plant grown by Mr

Tate,

originally introduced

by Capt. Daniels in 1830.

120 EDINB. J. BOT. 47(2)

Rhododendron crispiflorum Hooker, Bot. Mag. 79: t.4726 (1853).

Type:

a plant grown by Standish & Noble, originating as a

garden plant in China (or the plate drawn from it).

breynii Planchon, Fl. des Serres 9:77 (1855), nom. superfluum.

sieboldii Miquel var. serrulatum Miquel, Ann. Mus. Bot.

Lugduno-Batavum 1: 33 (1863). Described from a specimen

collected by Keiske on Mt Kirisima, Satsuma Prov, Japan.

balsaminiflorum Carriere, Rev. Hort. 432, t. (1882). Type: a

double-flowered form from Japan, brought by Viesener to

France in 1872 (or the plate cited).

hannoense Nakai, Bot. Mag. (Tokyo) 29: 261 (1915)—

Japanese text. Type not known.

la: Togashi et al., Species Rhododendron Japan 146, 151-153 (1982).

Much-branched shrub, usually low and prostrate, though sometimes up to 2m; young

shoots covered with adpressed flattened chestnut-brown setose hairs. Leaves dimor-

phic,

chartaceous; spring leaves narrowly lanceolate to oblanceolate, 2-3 x 0.8-lcm,

2.3-3 x as long as broad, apex acute, base cuneate, margin remotely crenate-serrulate,

ciliate,

upper surface with scattered bristles, lower surface paler, with setose bristles

restricted to midrib; summer leaves 10-18 x 3-5mm, otherwise as for spring leaves;

petioles 2-4mm, clothed with adpressed chestnut-brown setose hairs. Inflorescence 1-

2-flowered; pedicels 5-10mm, clothed with brown strigose hairs. Calyx with brown

strigose hairs, especially on lobe margins, lobes ovate to orbicular, c.lmm long.

Corolla broadly funnel-shaped, bright red to scarlet, occasionally rose-red, 3O-5Omm;

tube half the length of corolla, glabrous. Stamens 5, as long as or slightly exceeding

the corolla, filaments scabrid below. Ovary densely covered with adpressed shining

brown hairs; style glabrous. Capsule oblong-ovoid, c.lOmm long, densely strigose.

Japan (S & W Honshu, Kyushyu). Wooded river banks, etc.; also widely cultivated

and sometimes escaping. Map 12.

Many forms of this species are known in cultivation. All are presumed to have been

derived from Japanese stock though many 18th and 19th century introductions into

Europe arrived via China. The extensive synonymy, of which only a part is cited

above,

reflects the popularity of this species in cultivation.

35.

R. kaempferi Planchon, Fl. des Serres 9: 77 (1854).

Syn.: 'TsutsusV Kaempfer, Amoen. Exot. Fasc. 845, t.846 (1712)—

basionym, (Sloane Hb 211:8, 62, BM).

Azalea kaempferi (Planchon) Andre, Belgique Hort. 15: 184

(1865);

Rhododendron indicum (L.) Sweet var. kaempferi (Plan-

chon) Maxim., Rhododendr. As. Orient. 38 (1870); R. scabrum

G. Don var. kaempferi (Planchon) Nakai, Bot. Mag. (Tokyo)

33:

208 (1919).

Rhododendron sieboldii Miquel, Ann. Bot. Mus. Lugduno-Bata-

vum 1: 33 (1863). Described from Japan.

kaempferi Planchon var. macrogemma Nakai, Trees, Shrubs

RHODODENDRON SUBGENUS TSUTSUSI

121

Japan ed.

103 (1922);

macrogemma

(Nakai) Nakai,

Bot.

Mag. (Tokyo)

45:128

(1931).

Type:

Japan, IdzuProv, Oshima,

near Senzu,

Okubo,

n.v.

la:

Fl.

Suzakiensis

1.186

(1980); Togashi

et al.,

Species Rhododendron Japan 154—

156(1982).

Shrub,

1-3 m;

young shoots densely covered with adpressed flattened red-brown

strigose hairs.

Leaves

dimorphic, persistent, chartaceous; spring leaves lanceolate

elliptic, 2-4(-5)

l-2.5cm,

1.7-2.3 x as

long

broad, apex acute

obtuse, base

cuneate, margin entire, strigose on both surfaces, especially on

midrib;

summer leaves

10-20

5-10mm, otherwise

as for

spring leaves; petioles 3-5mm, indumentum

for young shoots.

Inflorescence

2-3-flowered; pedicels 3-5mm, densely covered with

adpressed brown strigose hairs. Calyx 3-5mm, strigose, lobes divided

base, ovate-

orbicular.

Corolla

funnel-shaped, 20-30mm,

red (in

cultivated forms from pink

salmon-red); tube 10-15mm, glabrous. Stamens 5(-6), longer than corolla, filaments

papillate

lower

half.

Ovary densely red-brown strigose; style glabrous. Capsule

c.5mm long, setose.

Japan (C Hokkaido

Yakushima). Mixed deciduous forest, 600-1000m. Map 13.

Closely allied

to R.

indicum

and

possibly conspecific,

but

differing

in its

broader

leaves

and greater

stature.

fcaemp/m

hybridises with R.

kiusianum where

the ranges

the two

overlap.

kaempferi

widely cultivated

and

consequently there

are a

number

cultivars available. Forms with stamens

and

pistil petaloid (var. plenum

Nakai)

and

with petaloid calyx (var.

komatsui

Nakai) have been found

the wild.

35*.

R. x

transiens Nakai, Trees Shrubs Japan

1,1: 103 (1922)—(R. kaempferi

R. macrosepalum).

Syn.:

tectum

Koidzumi,

Bot.

Mag.(Tokyo)

37:38

(1923)—Japanese

text. Type: Japan, Yamashiro, Kyoto, Daimonji-yama,

16-18

v 1920,

Koidzumi,

n.v.

poukhanense

Levl.

obtusifolium

Komatzu and

acutifolium

Komatzu,

Bot.

Mag.

(Tokyo) 32:37,38 (1918)—Japanese text.

indicum

Sweet var.

mikawanum

Makino,

Bot.

Mag. (Tokyo)

23:251

(1909).

Type:

Japan, Takashi-mura,

25 x

1893,

Makino,

n.v.

The specimens seen labelled

transiens

and R.

tectum

are

compatible with

the

proposed parentage

this natural hybrid that occurs within

the

area

overlap

between the ranges of the two putative parents. The specimens tend

have the larger

leaves

and

flowers

of R.

macrosepalum

but the

adpressed shoot indumentum

of R.

kaempferi.

The

sepal lobes

are

intermediate

size

and

shape between those

of the

two species.

35*.

R. x

komatsui Yamazaki,

J. Jap. Bot. 51: 31

(1976).—(R. kaempferi

x R.

mucronatum

var.

ripense).

Syn.:

purpureum

Komatzu, Bot. Mag. (Tokyo)

32:

(16) (1918),

non

G.Don (1834);

tectum Koidz.

var.

purpureum

(Komatzu)

122 EDINB.

BOT.

47(2)

Hara, Enutn. Sperm. Jap.

1: 54

(1948). Type:

Japan, Umato

Prov.,

n.v.

kaempferi. Planchon

var.

purpureum Nakai, Tress Shrubs

Japan ed.

1:103

(1922). Type: Japan, Prov. Yamaguchi, Miya-

gun,

Nakai,

s.n.

(holo.

TI,

n.v.).

We have

not

seen

any

material of this hybrid

and are not

therefore able

comment

on Yamazaki's synonymy quoted above.

36.

kiusianum Makino,

Bot. Mag.

(Tokyo) 28:

174

(1914). Type:

as for

indicum

var. amoenum forma japonicum Maxim,

(see

below).

Dwarf much-branched shrub, 0.6-lm; young shoots covered with adpressed flattened

red-brown hairs. Leaves monomorphic, deciduous, oval-obovate,

0.5-2

0.2-1.5cm,

c.2

long

broad, apex acute, base cuneate, margin entire, both surfaces covered

with red-brown strigose hairs; petioles l-3mm, densely covered with red-brown stri-

gose hairs. Inflorescence 2-3-flowered; pedicels 5-10mm, covered with red-brown

hairs.

Calyx 2-3mm, indumentum

as for

pedicels, lobes ovate c.2mm. Corolla funnel-

shaped, 15-20mm, usually rose-pink though occasionally with

wide range of colours

from rose

deep purple, lobes 7-10mm; tube glabrous. Stamens

longer than

or as

long

as the

corolla, pubescent below

the

middle. Ovary densely covered with

red-

brown strigose hairs; style glabrous. Capsule

5-6

c.4mm, strigose.

Japan (Kyushyu).

open woodland

hillsides, 600-800m. Map

The nomenclature

this species

has

been confused

by the

cultivated forms

and

hybrids that include

obtusum

and R.

amoenum,

well

as at

least some

the

Kurume cultivars.

la. Leaves oval

obovate,

0.5-2

0.2-lcm

36a. var. kiusianum

lb.

Leaves ovate-elliptic, 1-3 x 0.5-1.5cm

36b. var. sataense

36a. var. kiusianum.

Syn.: R.

indicum

(L.) Sweet var.

amoenum

(Lindley) Maxim, forma

japonicum Maxim., Rhododendr. As. Orients 41 (1870)—

basionym; R. kaempferi Planchon var.

japonicum

(Maxim.)

Rehder in Sargent, Trees and Shrubs

30 (1907); R.

indicum

(L.) Sweet var. japonicum (Maxim.) Makino, Bot. Mag.

(Tokyo) 22: 56 (1908); R.

obtusum

var.

japonicum

(Maxim.)

Kitamura, Acta Phytotax. Geobot. 25 (2-3): 37 (1972). Type:

Japan, in Kiusiu prov. Simabara vulcano Wuzen, medio,

Maijo florens (iso. BM).

Ic:

Togashi et al., Species Rhododendron Japan 158-160 (1982).

36b.

var. sataense (Nakai) Chamberlain & Rae, comb, et stat. nov.

Syn.: R.

sataense

Nakai, Bull. Nat. Sci. Mus. Tokyo 27: 33 (1949).

Type: Japan, Kyushyu, Prov. Osuma, in montibus Sata, cum

RHODODENDRON SUBGENUS TSUTSUSI 123

obtusum

eius varietate latifolio mixte, 16 iv 1948, Nakai

& Maruyama, n.v.

la: Togashi

al., Species Rhododendron Japan 162-165 (1982).

Var. sataense

intermediate between var. kiusianum and R. kaempferi and may

have arisen

as a

hybrid

these two taxa. According

Doleshy

(/.

Amer.

Rhodod.

Soc. 37:88, 1983) var. sataense occurs

stabilized populations

which

the

type

variety does not occur, and is less variable than plants from those populations where

hybrids between

kiusianum

and R.

kaempferi

are

known

occur.

The

flower

colour of var. sataense is variable, as

some though not all populations of var.

kiusianum.

36*.

R. saisiuense Nakai, Bot. Mag. (Tokyo)

49:

587 (1935). Type: a cultivated plant

exhibited in Tokyo in

1935

Suzuki;

originally from Mt Hallasan, Quelpaert Island,

Korea.

We are uncertain of the status of R.

saisiuense

as we have not seen any herbarium

specimens. Plants in cultivation at Edinburgh under this name appear to be small

forms of R.

kiusianum.

There is however no independent evidence that R.

kiusianum

occurs anywhere within the boundaries of Korea.

37.

R. tosaense Makino, Bot. Mag. (Tokyo) 18: 101 (1904). Syntypes: Japan, Tosa,

Takaoka-giri,

1885,

Makino,

n.v.;

Sodayama-mura,

5 iv 1887,

Makino,

n.v.;

Kamibun-

mura, xii 1888, Makino, n.v.

Syn.: R.

obtusum

Planchon var.

tosaense

(Makino) Kitamura, Acta

Phytotax. Geobot. 25(2-3): 37 (1972).

komiyamae Makino, J. Jap. Bot. 3(5): 17 (1926). Syntypes:

Japan, Prov. Suruga, Mt Ashitaka, Komiyama, 10 vi 1925,

Sawada,

n.v.

miyazawae

Nakai & Hara, J. Jap. Bot.

11:

823 (1935). Type:

Japan, Kyushu, prov. Hiuga circa Tomitaki-machi, Higashi-

usuki-gun,

iv 1929, Miyazawa 112, n.v.

surugaense

[Sugimoto ex] Kurata,

111.

Imp. Tr. Jap. 4: 182,

t.37 (1973). Type: as for R. komiyamae.

la: Togashi et al., Species Rhododendron Japan 166-173 (1982).

Much-branched shrub,

1.5-2m;

young shoots clothed with adpressed flattened grey-

brown strigose hairs.

Leaves

deciduous or partly persistent, crowded at the ends of

branchlets, dimorphic; spring leaves oblanceolate to oblanceolate-spathulate, 0.7-4

x 0.2-lcm, 3.5-4 x as long as broad, apex acute, base cuneate, margin entire, with

scattered adpressed grey hairs on both surfaces; summer leaves minute,

3-7mm

long,

otherwise as for spring leaves; petioles 2-4mm, adpressed-strigose.

Inflorescence

1-6-

flowered; pedicels 4-10mm, densely adpressed-strigose. Calyx covered with flattened

strigose hairs, lobes broadly ovate, c.2mm, ciliate.

Corolla

funnel-shaped, 18-25mm,

purplish-pink with or without darker

flecks,

rarely white with a faint pink flush; tube

10-14mm, glabrous. Stamens 5(—10), unequal, c. as long as the corolla, filaments

124 EDINB.

BOT. 47(2)

coarsely papillate

lower

half.

Ovary densely strigose, style glabrous. Capsule

not

known.

Japan (Kyushyu, Shikoku,

Honshu). Open slopes, etc. c.lOOm.

Map 10.

komiyamae from

Honshu

said

differ from

tosaense

in the

strict sense

(from Shikoku

and S

Honshu)

in its 10 as

opposed

to 5-6

stamens.

We are

unable

confirm

the

constancy

this difference from

the few

specimens that

have seen

and

are

following Rehder's treatment

reducing

komiyamae

to a

synonym

of R.

tosaense.

38.

R. brevipendatum Hayata, Icon. PI. Formosan. 3: 129 (1913). Type: Taiwan,

Nanto, Mt Pusasai, iv 1909, Mori, n.v. (holo. TI).

Ic:

Kanehira, Formos. Trees, 318 (1917)—leaf only.

Much-branched

shrub;

young shoots

slender,

covered with adpressed

flattened

shining

brown hairs.

Leaves

persistent, chartaceous, ovate-elliptic, 1-3 x 0.6-1.7cm,

1.8-2.5

x as long as broad, apex obtuse and mucronate, margin entire, base broad, cuneate-

rounded, both surfaces with scattered adpressed pilose shining brown hairs that turn

grey, upper surface with impressed midrib, lower surface reticulate; petiole 2-5mm.

Inflorescence

2-several-flowered; pedicels 3-5mm, covered with shiny flattened white

hairs.

Calyx 2-4mm, indumentum as for pedicels,

5-lobed.

Corolla

funnel-campanu-

late,

rose-pink with crimson spotting on upper

lobes,

25mm.

Stamens

5(-6), filaments

pilose below

middle,

anthers apiculate at

base.

Ovary

conic,

densely

pilose;

style pilose

at base, dilated at apex.

Capsule

not known.

China (Taiwan). Map 14.

The plant in cultivation

Edinburgh

has a low,

spreading

habit.

this

it apparently

matches the type specimen.

39.

R. lasiostylum Hayata, Icon.

PI.

Formosan.

3: 135

(1913).

Type:

Taiwan, in monte

Randaisan, vi

1911,

Mori s.n. (holo. TI, n.v.).

Syn.: R.

sasakii

Wilson, J. Arnold Arb. 6: 181 (1925). Type: Taiwan,

Nanto Prov., Horisha, planted in a hotel garden, apparently

collected in the wild (holo. A).

Shrub, l-2m; young shoots densely clothed with a mixture of adpressed villose and

flattened strigose

hairs.

Leaves

dimorphic, deciduous to + persistent, subcoriaceous;

spring leaves obovate to elliptic, 2-4 x

1.2-2cm,

1.7-2.5

x as long as broad, apex

rounded to acute, mucronate, base cuneate, margin entire, both surfaces with sparse

adpressed greyish-brown strigose hairs; summer leaves oblong-obovate to oblan-

ceolate, 13-40 x 4-20mm, up to 4 x as long as broad, otherwise as for spring leaves;

petioles 2-4mm, adpressed-strigose. Inflorescence 2-3-flowered; pedicels c.5mm,

densely covered with whitish flattened hairs. Calyx 2-3mm, densely strigose, lobes 1-

3mm.

Corolla

funnel-shaped, pink, c.20mm; tube c.7mm long, glabrous. Stamens 10,

c. as long as corolla, filaments papillate below middle.

Ovary

densely strigose; style

strigose below.

Capsule

ovoid, c.8mm, strigose.

China (Taiwan). Mountain sides, 2375-3350m. Map 14.

RHODODENDRON SUBGENUS TSUTSUSI 125

The type specimen of

sasakii was said to be red-flowered whereas the flowers of

lasiostylum are pink. However, the type specimen of

lasiostylum is poor, making

its true identity uncertain. We therefore follow Wilson's concept of the species that is

apparently based on Wilson 10020 (BM!, K!).

This species is allied to R. rubropilosum but differs in its larger, often obovate,

leaves, etc.

40.

R. rubropilosum Hayata, J. Coll. Sci. Imp. Univ. Tokyo 30(1): 173 (1911). Syntypes:

Taiwan, Tozan, in montibus Morrison, x 1906, Nakahara, n.v.; central mountains, xi

1906,

Kawakami & Mori 1857 (TI), 1859 (TI); Randazian, v iii 1908, Hayata & Mori

7044,

n.v.

Syn.: R. caryophyllum Hayata, Icon. PI. Formosan. 3:130, t.23 (1913).

Type; Taiwan, 1909, Mori s.n., n.v.

randaiense Hayata, Gen. Index Fl. Formosa 43 (1917)—

nomen nudum.

Shrub, to 3m; young shoots densely covered with adpressed flattened grey to reddish-

brown hairs. Leaves monomorphic, chartaceous, oblong-lanceolate to elliptic, l-3(-

5.5) x 0.5-l(-2.5)cm, 2-3. x as long as broad, apex acute and with a glandular

mucro, base cuneate, margin entire, upper surface with pale grey adpressed hairs,

lower surface clothed with flattened adpressed red-brown hairs, especially on midrib;

petioles 3-5mm, densely covered with flattened red-brown hairs. Inflorescence 2-4-

flowered; pedicels 2-4mm, densely strigose, hidden by bud scales. Calyx minute,

densely covered with strigose red-brown hairs. Corolla funnel-shaped, pink with rose

flecks, 10-15(-25)mm. Stamens 7-10, filaments pilose towards base. Ovary covered

with pale grey soft hairs; style with a few flattened brown hairs at base. Capsule conic-

ovoid, c.5mm long, covered with shaggy red-brown hairs. :

Taiwan (Ilan, Nantou, Chiaye). 2400-3000m. Map 15.

41.

R. sikayotaizanense Masamune, Trans. Nat. Hist. Soc. Formosa 29: 27 (1939).

Type: Taiwan, Mt Sikayotaizan, 1936, Mori s.n., n.v.

Shrub; young shoots covered with adpressed-strigose hairs. Leaves monomorphic,

coriaceous, oblong to ovate-oblong, 0.4-1.4 x 0.2-0.6cm, 2-2.2 x as long as broad,

apex apiculate, base cuneate, upper surface sparsely adpressed-hirsute, lower surface

adpressed-hirsute, with a densely pilose midrib; petioles not known. Inflorescence 2-

3-flowered; pedicels c.lOmm, ± pilose. Calyx with linear-lanceolate, ciliate lobes,

c.4mm long. Corolla campanulate, red, c.20mm. Stamens 4-6, unequal, filaments

sparsely hirsute. Ovary densely hirsute; style glabrous. Capsule not known.

Taiwan. Map 16.

Resembles R. rubropilosum, R. nakaharai and R. noriakianum but differs in having

fewer stamens. We have seen no material of this species.

42.

R. noriakianum Suzuki, Trans. Nat. Hist. Soc. Formosa 25: 40 (1935). Type:

Taiwan, Hsinchu, Sikayotasan, Fukyama 3005, n.v.

126 EDINB. J. BOT. 47(2)

Low shrub; young shoots adpressed-strigose, soon glabrescent. Leaves monomorphic,

deciduous, chartaceous, ovate to ovate-oblong, 0.7-1.5 x 0.4-0.6cm,

1.7-2.5

x as

long as broad, apex obtuse, apiculate, base cuneate, margin entire, upper surface

glabrescent; petioles l-2mm, strigose. Inflorescence 3-4-flowered; pedicels 3-4mm,

densely pilose. Calyx densely pilose, lobes acute. Corolla funnel-shaped, 15mm, red,

details of tube not known. Stamens 7-10, unequal, slightly exserted; filaments

pubescent below. Ovary pubescent; style glabrous.

China (N Taiwan). Open grasslands, 2000-3000m. Map 16.

Apparently allied to R. nakaharai and R. longiperulatum but differing in the smaller

corolla and slightly exserted stamens.

43.

R. microphy ton Franchet, Bull. Soc. Bot. Fr. 33:235 (1886). Type: China, Yunnan,

in montibus circa Tali, 2130m, Delavay (iso. K).

Syn.: R. microphyton Franchet var. trichanthum A.L. Zhang, Acta

Bot. Yunnanica 4: 249 (1982). Type: China: Yunnan, Bijiang,

28 vi 1979, A.L. Zhang 79-2093 (holo. KUN, n.v.).

la: Stevenson (ed.), Sp. Rhodod. 91 (1930).

Upright shrub, usually

dwarf,

0.3-2m; young shoots covered with adpressed flattened

brown hairs. Leaves monomorphic, chartaceous, elliptic to lanceolate, 1-4 x 0.5-

1.5cm,

2-2.6 x as long as broad, apex obtuse to acute, mucronulate, base cuneate,

margin entire, both surfaces with adpressed red-brown hairs, the lower surface paler,

with a denser indumentum; petioles l-4mm, covered with brown strigose hairs.

Inflorescence 3-6-flowered, with smaller axillary inflorescences below the terminal

ones;

pedicels 3-7mm, covered with shining chestnut-brown hairs. Calyx densely

covered with brown strigose hairs; lobes lanceolate, l-2mm. Corolla funnel-cam-

panulate, usually purple-rose, occasionally white flushed pink, with crimson flecks, 10-

15(-22)mm; tube 6-8mm, 2-3mm wide at base, glabrous on outer surface, pubescent

within. Stamens 5, longer than corolla, filaments sparsely pilose below middle. Ovary

densely covered with shining chestnut-brown hairs; style glabrous. Capsule c.8 x

4mm, densely strigose.

E Burma, China (Yunnan, SW Sichuan), Thailand?. Open scrub, 18OO-3O5Om. Map

14.

There is some doubt over the identity of the specimen from Thailand (see note

under R. saxicolum).

44.

R. jinpingense Fang & M.Y. He, Bull. Bot. Res. N.E. Forest. Inst. 2(2): 85 (1982).

Type: China, Yunnan, Jinping Xian, 1850m, 13 iv 1964, S.C. Tung 494 (holo. SZ,

n.v.).

Shrub; young shoots slender, densely covered with brownish strigose hairs intermixed

with glandular setae. Leaves dimorphic, thickly chartaceous, elliptic to elliptic-oblong;

spring leaves 3.5-4.5(-5) x

1.5-2cm,

apex shortly acuminate, base broadly cuneate

to obtuse, margin entire, lower surface pale, main and lateral veins strigose; summer

leaves smaller; petioles 2-3mm, densely brownish-setose strigose. Inflorescence 3-5-

flowered; pedicels 2—10mm, densely brownish-setose-strigose. Calyx to 3mm, lobes

RHODODENDRON SUBGENUS TSUTSUSI 127

oblong-ovate, sparsely glandular. Corolla funnel-shaped, reddish, with darker flecks,

c.lOmm; tube cylindrical,

c.5 x

2mm, lobes sparsely glandular

outer surface.

Stamens 5, filaments puberulent below; style sparsely glandular in lower

half.

Capsule

not known.

China (Yunnan). Map 14.

Allied

by the

author

to R.

microphyton

but

differing

smaller

and

glandular

flowers; also allied

to R.

subenerve

but

differing

in its

larger thicker leaves.

The

apparently narrowly tubular flower may also

be a

reliable character

separate this

species from

microphyton. Since we have not seen any material

this species we

cannot be certain of its affinities.

45.

subenerve P.X.Tan, Survey Gen. Rhododendron

China 108, f.29 (1983)

Guihaia 3,3: 180 (1983). Type: China, Guangxi, Guangyang Xian, Baijing, 22 ix 1958,

Chen,

Z.Z.

52211 (holb. IBSC, n.v., photo. E).

Syn.:

? R.

glandulostylum Fang

M.Y.

He,

Bull.

Bot.

Res.

N.E.

Forest. Inst. 2(2): 84 (1982), non

glandulistylum Komatsu

(1918). Type: China, Guangxi, Jinxiu Yaozu Zizhi Xian

(Dayaoshan Xian, Jinxiuqu), 1260m,

4 v

1964,

F.N. Wei

809

(holo. IBK, n.v.).

Shrub, c.2m; young shoots densely adpressed-strigose. Leaves

dimorphic, char-

taceous, elliptic-oblong

narrowly elliptic; spring leaves 2.5-3(-3.5)

0.8-1.4cm,

2.5-3

as long as broad, apex subacuminate, base cuneate; margin obscurely crenate,

ciliate; upper surface adpressed-strigose

first, later glabrescent, lower surface pale

at maturity,

glabrescent except

for the

strigose midrib reddish-brown-strigose;

summer leaves 12-15

7-8mm, otherwise

as for

spring leaves; petioles 2-4mm.

Inflorescence 3-6-flowered; pedicels c.5mm, glandular and densely strigose. Calyx c.3

mm, densely strigose, lobes c. lmm, triangular. Corolla funnel-shaped, red, with purple

flecks, 12-16mm; tube 6-8mm, c.4mm broad, shortly stipitate-glandular

outer

surface, puberulent within; lobes 6-8mm. Stamens

filaments puberulent. Ovary

densely reddish-brown-strigose; style stipitate-glandular

for

most

its length, also

strigose

base. Capsule not known.

China (Guangxi). Woodland etc, 1260-1700m. Map 15.

From the descriptions and photographs available

seems most probable that

glandulostylum

is a

synonym

of R.

subenerve.

any case

new name

required

glandulostylum Fang & He is maintained as

separate species. The original authors

suggest that

glandulostylum

allied

to R.

microphytum and, from

the

evidence

before us, this seems likely. The chief differences are

in the

size and texture

the

leaves. Probably also allied

to R.

fuchsiifolium

but

apparently differing

in the

less

acuminate leaves, etc.

46.

subsessile Rendle,

Bot. 34: 357 (1896). Type: Philippines, Luzon district

Lepanto, Mount Data, Whitehead, Merrill 4606 (holo. BM).

Much-branched shrub; shoots densely covered with adpressed flattened brown hairs.

Leaves dimorphic, chartaceous; spring leaves elliptic-lanceolate, 2.5-4

0.9-1.2cm,

128 EDINB.

BOT. 47(2)

2-4

as long as broad, margin entire, slightly recurved, apex acute and mucronate,

base cuneate, both upper and lower surfaces

first clothed with rufous-grey silky

hairs,

maturity with white adpressed hairs

upper surface, midrib impressed

above,

prominent below; summer leaves c.15

7mm, otherwise as for spring leaves;

petioles 2-5mm, clothed with adpressed chestnut-brown hairs. Inflorescence

2-4-

flowered; pedicels 5-7mm, clothed with adpressed ferrugineous hairs, hidden by the

bud scales. Calyx small, with oval lobes, densely clothed with flattened brown hairs.

Corolla funnel-campanulate, 15-20mm, lilac-purple; tube c.8mm, 3mm wide

base,

glabrous. Stamens 6-10, slightly exserted, papillose below the middle. Ovary densely

covered with ferrugineous flattened hairs; style exserted, with

few flattened brown

hairs

base. Capsule conic-ovoid, densely covered with flattened adpressed rufous

hairs.

Philippine Islands (Luzon). Map 15.

47.

atrovirens Franchet, Bull. Soc. Bot. Fr. 33: 235 (1886). Type: China, Yunnan,

prope Tchen-fong-chan, haud procul

Takouan, Delavay (iso. E, K?).

Large shrub or small tree; young shoots covered with adpressed flattened brown hairs.

Leaves monomorphic, persistent, elliptic,

2-8 x

l-3cm, 2-2.7

x as

long

broad,

apex acuminate, margin entire, base broadly cuneate

to ±

rounded; both surfaces

covered with adpressed shining brown hairs, glabrescent above except

midrib,

lower surface paler, persistently adpressed brown-hairy, densely

so on

midrib

and

veins;

petioles 5-8mm, strigose. Inflorescence 2-4-flowered; pedicels 6mm, densely

covered with adpressed flattened shining brown hairs. Calyx 2-4mm, indumentum

for pedicels, lobes short, deltoid. Corolla funnel-campanulate, glabrous,

red

with

darker flecks

base

upper lobes, 15-30mm; tube 7-10mm, glabrous, 4mm wide

at base. Stamens 10, unequal, to c.30mm, shortly pilose below middle. Ovary densely

covered with adpressed flattened shining brown hairs; style glabrous. Fruit not known.

China (S Sichuan, NE Yunnan). Thickets, 750-1800m. Map 15.

48.

R. fuchsiifolium Levl., Repert. Spec. Nov. Regni Veg. 13: 148 (1914). China,

Guizhou, Pin-fa, 20 v 1907,

Cavalerie

3221

(holo. E).

Syn.: R. tenue [Ching ex] Fang & M.Y. He, Bull. Bot". Res. N.E.

Forest. Inst.

2(2): 87, t.5

(1982).

Type:

China,

Guangxi,

Xingan

Xian, Jiu Qu, Leigontien, ad Tangton, vi 1953,

Guangxi

PI.

Exp. 611

(holo. PE, iso. IBSC).

Upright shrub; young shoots covered with flattened adpressed brown hairs. Leaves

apparently monomorphic, elliptic to ovate, 1-4 x 0.5-1.4cm, 2-2.5 x as long as

broad, apex acute or acuminate, base cuneate, margin entire, upper surface strigose,

lower surface with flattened strigose hairs on midrib, otherwise glabrous; petioles 3-

5mm, densely covered with brown strigose hairs.

Inflorescence

3-5-flowered; pedicels

3-5mm, covered with shiny long brown strigose hairs, with an understorey of glandu-

lar hairs. Calyx densely covered with brown flattened strigose hairs, lobes 2-4mm,

linear-lanceolaate.

Corolla

funnel-shaped, pale rose, 5-10mm; tube 3-5mm, with five

rows of glandular hairs on outer surface. Stamens 5, c. as long as corolla, glandular

RHODODENDRON SUBGENUS TSUTSUSI

129

below middle. Ovary covered with shining red-brown hairs; style glandular and pilose

below middle, shorter than stamens. Capsule not known.

China (Guizhou, Guangxi). Map 15.

The recently described

tenue lacks flowers but

all other respects resembles

fuchsiifolium.

49.

R. nakaharai Hayata, J. Coll. Sci. Imp. Univ. Tokyo 25(19): 153 (1908). Type:

China N Taiwan, in Monte Shichiri, (Chihsinshan), vii

1905,

Nakahara

82 (holo. TI).

Ic:

Proc. Nat. Sci. Counc. (Life Sci.) 6: 26, f.ll (1973).

Low,

prostrate, much-branched

shrub;

young shoots covered with adpressed flattened

shining brown

hairs.

Leaves

persistent, chartaceous, monomorphic, elliptic to elliptic-

obovate,

0.5-1.2

x 0.2-lcm, 2-2.5 x as long as broad, apex acute or mucronulate,

base cuneate, margin entire, upper surface with scattered pilose hairs borne on raised

pustules, lower surface paler, with scattered adpressed shining brown hairs; petioles

l-4mm, densely

strigose.

Inflorescence

2-3-flowered; pedicels 3-5mm, densely covered

with flattened shining brown hairs. Calyx strigose, lobes c.2mm, ciliate. Corolla

funnel-campanulate, dark-red, 20-25mm; tube

villous

within.

Stamens

10,

longer than

corolla, filaments pilose in lower

half.

Ovary

densely setose; style glabrous.

Capsule

not known.

China (N Taiwan). Map 15.

Allied to R.

serpyllifolium

but differing in the number of

stamens,

etc.

The corollas are described in

Fl.

Taiwan

(3:

32) as being 35mm and 40mm across.

These measurements are significantly larger than those cited in the type description

and those on the type specimen

itself.

50.

R. serpyllifolium (A. Gray) Miquel, Ann. Mus. Lugduno-Batavum 2:165 (1865—

66).

Type: Japan, cult.,

Morrow

Williams,

n.v.

Syn.:

Azalea serpyllifolia

A. Gray, Perry Jap. Exped.2: 315 (1857).

Rhododendron serpyllifolium

var.

albiflorum

Makino, Bot. Mag

(Tokyo) 22:57 (1908). Described from the western mountains

of Japan.

Ic:

Bot. Mag. 122: t.7503 (1896); Togashi et al., Species Rhododendron Japan 179-

180 (1982).

Low,

much-branched

shrub;

shoots slender, clothed with adpressed

flattened

chestnut-

brown hairs.

Leaves

monomorphic, deciduous, crowded at end of short branchlets,

obovate-oblong or elliptic, 0.3-1 x 0.3-O.5cm, 1-2 x as long as broad, apex obtuse

acute,

base

cuneate,

upper surface with scattered strigose brown hairs and pustules,

lower surface with hairs mainly on midrib, with pustules; petioles lmm, strigose.

Inflorescence

l(-2)-flowered; pedicels 3mm, strigose, hidden beneath the bud scales.

Calyx small.

Corolla

short, funnel-form, c.l7mm, rose-pink; tube with outer surface

glabrous, papillate

within.

Stamens

papillate for most of their

length.

Ovary

densely

covered with pale flattened hairs; style glabrous.

Capsule

unknown.

Japan (Central and Southern). 300m. Map 17.

130 EDINB.

BOT.

47(2)

51.

tschonoskii Maxim., Rhododendr.

As.

Orient.

42, t.3

(1870). Type: Japan,

Nippon borealis (Nambu) mediae alpibus,

1865, 1866,

Tschonosky (iso.

BM, K).

Much-branched shrub, 0.3-1.5m; young shoots densely covered with adpressed flat-

tened rufous hairs. Leaves monomorphic, chartaceous, lanceolate

elliptic,

1-3.5

0.3-lcm,

2-2.3

x as

long

broad, apex acute, base cuneate, margin entire, both

surfaces with scattered adpressed whitish

pale brown villous hairs, especially

triidrib; petioles l-5mm, covered with adpressed red-brown hairs. Inflorescence

3-6-

flowered, flowers appearing after leaves; pedicels c.3mm, covered with adpressed

whitish hairs. Calyx minute, covered with flattened pale brown strigose hairs, lobes

c.lmm. Corolla 4-5-lobed, funnel-shaped, white, 7-9mm; tube cylindrical, c.5mm,

glabrous

outer surface, hairy within. Stamens 4-5, longer than corolla, filaments

pubescent below

the

middle. Ovary densely covered with pale brown strigose hairs;

style glabrous. Capsule ovoid, 2-5mm long, densely strigose.

la. Leaves 4-5-nerved, 10-20mm long

51a. var. tschonoskii

lb.

Leaves

3-nerved,

20-35mm long

51b. var. triverve

51a. var. tschonoskii.

Syn.: R.

tschonoskii

Maxim, var.

typicum

tetramerum

Makino, Bot.

Mag. (Tokyo)

18:

(1904);

tschonoskii

Maxim, var. tetra-

merum (Makino) Komatzu, Bot. Mag. (Tokyo) 32: 15

(1918)—Japanese text; R.

tetramerum

(Makino) Nakai, Bull.

Nat. Sci. Mus. Tokyo

31:

(1952).

Type not designated.

la: Nakai, Fl. Sylv. Kor. 8: t.17 (1919); Togashi et al., Species Rhododendron Japan

190-192 (1982).

Korea,

Japan (Hokkaido, E

& S

Honshu, Shikoku, Kyushyu), USSR (Kamchatka).

Rocky mountain summits, 1500-1800m. Map 18.

51b.

var. trinerve (Franchet) Makino, Bot. Mag. (Tokyo)

18:

66 (1904).

Syn.: R.

trinerve

Franchet, Bull. Herb. Boiss. 5: 920 (1897). Syntypes:

Japan, Shonai, cult., vi 1888,

Faurie

2674, n.v.; Abashiri, viii

1892,

Faurie

8566, n.v.

la: Togashi et al., Species Rhododendron Japan 194-196 (1982).

Japan (NW Honshu). Rocky ridges, etc. 700-lOOOm. Map 18.

Var.

trinerve

is generally more luxuriant, at least vegetatively, than var.

tschonoskii.

Togashi (op. cit.) suggests that it replaces var.

tschonoskii

in NW Honshu.

52.

R. saxicolum Sleumer, Blumea, suppl. 4:49

(1958).

Type:

Vietnam, Tonkin, prov.,

Lac-Kay, Col de Le Qui-Ho, environs de Cha-Pa, 1800m,

Poilane 25419

(holo. L, iso.

P)-

Shrub, 3-6m; young shoots at first covered with adpressed red-brown setose hairs,

soon glabrescent.

Leaves

dimorphic, persistent, subcoriaceous; spring leaves ovate to

ovate-oblong 4-7.5 x

2-3.5cm,

2-2.2 x as long as broad, apex acuminate, gland-

tipped, base broadly cuneate, margin entire, upper surface glabrescent though with a

RHODODENDRON SUBGENUS TSUTSUSI 131

few persistent strigose hairs on the midrib, lower surface with scattered adpressed

strigose hairs, persisting on the lamina; summer leaves 15-20 x 5-10mm, otherwise

as for spring leaves; petioles 3-7mm, densely adpressed-stirgose. Inflorescence

3-4(-5)-flowered; pedicels 3-7mm, densely rufous-strigose. Calyx c.2mm, covered

with strigose hairs, lobes lanceolate.

Corolla

funnel-shaped, white tinged with rose,

15-20mm; tube

5-7mm,

glabrous on outer surface, papillate within.

Stamens

slightly

longer than corolla, hairy below

middle.

Ovary

densely rufous-strigose; style hairy at

base.

Capsule

ovoid, 7-9mm long.

Vietnam. Rocky soil in forest, 400-1800m. Map 15.

Allied to R.

seniavinii

but with a laxer inflorescence, etc.

A specimen from Thailand

(Garrett

837), may belong to this species but differs in

its larger

flowers

(25mm) and its glabrous style. Sleumer (op. cit.) refers this and one

other specimen, also from Thailand (Put 3325), to R.

microphyton

on account of the

glabrous styles. The fatter, however, has

flowers

with lobes significantly longer than

tube,

a characteristic of R.

saxicolum.

In any case size of flowers and leaves is more

extreme for R.

microphyton

than it is for R. saxicolum.

53.

R. arunachalense Chamberlain & Rae, sp. nov. (see p. 197). Type: N E India,

Arunachal Pradesh, Subansiri district, Yachuli, 1500m, 28 iv 1977, H.B. Naithani

Ser.II:894 (holo. E, iso. DD).

Shrub, 4.5m; young shoots adpressed-brown-strigose. Leaves probably dimorphic,

chartaceous; spring leaves elliptic-ovate lanceolate,

3.5-6.5

1.6-2.8cm,

c.2.3 x as

long as broad, apex acuminate, base cuneate, margin with stiff incurved hairs, +

entire, upper surface sparsely adpressed-strigose, lower surface adpressed rufous-

strigose, densely so on midrib and lateral veins; petioles 6-12mm, densely adpressed

strigose.

Inflorescence

3-flowered; pedicels

5-7mm,

densely brown-strigose with large

stiff and thinner crisped

hairs.

Calyx ± obsolete,

strigose.

Corolla

open funnel-shaped,

light pink, darker inside, 23-27mm; tube 6-7mm, glabrous, 3mm broad at

base,

6mm

broad above. Stamens 5, 30mm long, scabrid at base. Ovary densely strigose; style

glabrous 35mm.

Capsule

unknown.

N E India (Arunachal Pradesh). River beds, 1500m.

Probably allied to R.

saxicolum

but with a more acute

leaf,

corolla darker, tube

glabrous within.

This

new species is

geographically

isolated,

and

the most westerly of the subgenus.

54.

R seniavinii Maxim., Rhododendr. As. Orient. 33: t.3,

f.21-24

(1870). Type: S

China,

Seniavin

(holo. LE, n.v.,

iso.

PE).

Ic:

Tan, Survey Gen. Rhododendron S. China f.ll (1983).

Shrub, to 2m; shoots densely covered with adpressed flattened grey or rufous-grey

hairs.

Leaves dimorphic, persistent or subpersistent; spring leaves ovate-oblong to

lanceolate, 1.5-6 x 0.8-2.5cm, 2-3 x as long as broad, apex acuminate or acute,

base broadly cuneate, upper surface glabrous or glabrescent when mature, lower

surface densely clothed with long strigose rufous or grey-brown hairs; summer leaves

smaller, 10-20 x

5-8mm,

ovate to broadly oval, apex acute to obtuse; petioles 3-

132 EDINB. J. BOT. 47(2)

8mm, densely strigose. Inflorescence 3-10-flowered; pedicels 3-5mm, densely stigose.

Calyx c.3mm, lobes lanceolate, covered with straight grey or rufous-grey

hairs.

Corolla

funnelform, white suffused rose to light purple, with upper lobe spotted, 12-17mm;

tube 7-10mm, 2mm wide at base, sparsely hairy within outer surface sparsely hairy

to stipitate-glandular. Stamens 5, clothed with strigose hairs; style villose at base.

Capsule up to 8mm, narrowly ovoid, densely strigose.

China (Guizhou, Hunan, Fujian). Thickets, wooded slopes, 600-1400m. Map 16.

54*

R. qianyangense M.Y.He, Bull. Bot. Res. N.E. Forest. Inst. 5(4): 115 (1985). Type:

China, Hunan, Qianyang Xian, Luo-ong-ha-mian-shan, Xia-ping-kou, 1120m, 7 v

1959,

P.X. Tan 60590 (holo. IBSC, n.v.).

Map 16.

From the description this species appears to be very close to R. seniavinii but

apparently differs in its stamens having glabrous filaments. While Tan does not cite

this specimen, there is another {Tan 60559) which was collected in the same locality,

that is referable to R. seniavinii.

55.

R. yangmingshanense P.X.Tan, Bull. Bot. Res. N.E. Forest. Inst. 2(1): 97, t.l

(1982). Type: China, Hunan, Ningyuan Xian, Yangming Shan, 250m, 4 iv 1942, T.

Tsiang & S.Q. Chen (S.H. Chun) 365 (holo. IBSC).

Shrub; young shoots densely greyish-brown sericeous-strigose. Leaves dimorphic,

coriaceous; spring leaves oblong-lanceolate, 2.5-3 x

1.2-1.3cm,

c.1.5 x as long as

broad, apex acuminate, base cuneate, margin undulate, densely ciliate, upper surface

grey-strigose; summer leaves oblong-elliptic to elliptic, 10-20 x 5-8mm; petioles 5-

10mm, densely spreading-strigose. Inflorescence 5-8-flowered; pedicels 4-5mm,

densely strigose. Calyx

1.5-2mm,

densely brownish-strigose, lobes crenulate. Corolla

funnel-campanulate, 8-10mm, reddish to pale purple; tube 5-6mm, glabrous. Stamens

filaments pubescent below. Ovary densely sericeous-strigose; style base strigose.

Capsule ovoid, c.6 x 3.5mm, strigose.

China (Hunan). Open woodland, 250m. Map 16.

Probably allied to R. seniavinii, with which it shares a characteristic sericeous

indumentum, but differing in its less hairy leaves, and corollas glabrous on the outer

surface.

56.

R. naamkwanense Merrill, Lingnan Sci. J. 13:42 (1934). Type: China, Guangdong,

Naamkwam Shan, Zengcheng Xian, 20 iv 1932, W.T. Tsang {Huang, H.D.) 20392

(holo. PE, iso. K).

Dwarf shrub, to 0.5m; young shoots covered with adpressed flattened brown strigose

hairs.

Leaves monomorphic, persistent, coriaceous, obovate to oblanceolate, 1-2.5 x

0.5-1.2cm, c.2 x as long as broad, apex mucronate, base cuneate, margin entire, upper

surface glabrescent, lower surface with sparse adpressed strigose hairs, especially on

midrib; petioles c.3mm, densely adpressed-strigose-hairy. Inflorescence 2-4-flowered;

pedicels 2-3mm, pilose. Calyx minute, densely strigose. Corolla funnel-campanulate,

RHODODENDRON SUBGENUS TSUTSUSI

133

rose,

with

without darker flecks, c.30mm; tube c.lOmm, glabrous. Stamens

filaments glabrous. Ovary densely pilose; style glabrous. Capsule not known.

China (Guangdong, Jiangxi). Moist shaded cliffs, c.500m. Map 16.

la. Leaves with conspicuous lateral veins beneath; corolla

apparently without flecks

56a. var.

naamkwanense

lb.

Leaves with lateral veins obsolete beneath; corolla with dark

flecks

56b.

var.

cryptonerve

56a.

var.

naamkwanense.

Syn.: R.

ripaecola

P.X.Tan, Survey Gen. Rhododendron S. China 110

(1983).

Type: China, Guangdong, Ruyuan Xian, 20 xi 1933,

X.P.

Gao (S.P. Ko) 53773 (holo. IBSC).

56b.

var. cryptonerve P.X.Tan, Bull. Bot. Res. N.E. Forest. Inst.

2(1):

(1982).

Type:

China, Guangdong, Pingyuan Xian, 500m, 27 iv 1957, L. Teng 4437 (holo. IBSC,

n.v.).

Since we have seen no material of

var.

cryptonerve

we are dependent on Tan's brief

description for our understanding of this taxon.

57.

R. bicorniculatum P.X.Tan, Survey Gen. Rhododendron S. China 104, f.5 (1983).

Type:

China, Guangdong, Conghua Xian, Rhu-Tin, in rivulo, prope vallem, 16 iii

1973,

S.Q. Chen (S.H.Chun) 18489 (holo. IBSC).

Shrub elm, young shoots densely covered with reddish-brown strigose hairs. Leaves

dimorphic, coriaceous; spring leaves obovate to obovate-elliptic 3.5-5 x

1.5cm,

2.2-

2.6(-3.3) x as long as broad, apex shortly acuminate, margin revolute, base cuneate,

upper surface sparsely strigose at first, becoming glabrescent, lower surface pale,

adpressed reddish-brown-strigose, especially on midrib; summer leaves spathulate-

ovate,

15-20 x 7-9mm, otherwise as for spring leaves; petioles short. Inflorescence

2-4-flowered; pedicels c.5mm, densely reddish-brown-strigose. Calyx strigose, minute.

Corolla

funnel-campanulate, reddish purple,

18mm;

tube

c.5mm.

Stamens

pubescent

below, anthers with apical projections.

Ovary

strigose;

style

glabrous.

Fruit

cylindrical,

strigose, 12-13 x 3-4mm.

China (Guangdong). By streams. Map 19.

Close to R.

naamkwanense

but differing in its larger

leaves,

4-flowered inflorescence,

and in the form of the anthers.

58.

R. chunii Fang, Sunyatsenia 7:1 (1948). Type: China, Guangdong, Kock-Kiang

(Qujiang), Chut-Hsin Tun, 18 iv 1930, X.P. Gao (S.P. Ko) 50411 (holo. SYS; iso. E,

PE).

Small shrub, to 2m; young shoots covered with adpressed flattened strigose red-brown

hairs.

Leaves monomorphic, coriaceous, persistent, elliptic to oblong-ovate, 1-2 x

0.5-0.9cm, 2 x as long as broad, apex acuminate, base broadly cuneate, margin

entire, upper surface strigose, lower surface paler, strigose, especially on midrib;

134 EDINB. J. BOT. 47(2)

petiole 2-3mm, strigose. Inflorescence 2-3-flowered; pedicels 5-7mm, densely brown-

strigose. Calyx strigose; lobes l-2mm, oblanceolate. Corolla funnel-shaped, lilac-

purple,

upper lobes flecked, 9-10mm; tube c.6 x 3mm, with 5 rows of glands on outer

surface, also glandular within. Stamens 5, sub-equal, filaments minutely hairy below.

Ovary densely covered in fine brown hairs; style covered with fuscous setose hairs and

glands in lower

half.

Ripe capsule not known.

China (N Guangdong). Wooded slopes and ravines. Map 19.

Tan describes the leaves as being dimorphic, the spring leaves 38-40 x 10-15mm;

specimens seen by us do not confirm this.

59.

R. viscigemmatum P.X.Tan, Guihaia 3: 181 (1983). Type: China, Guangxi, He

Xian, Gupo Shan, 1000m, 9 viii 1958, Y.K. Li 401515, (holo. IBSC, n.v.).

Shrub,

c.3.5m, shoots punctulate, adpressed-hairy; floral buds viscid. Leaves dimor-

phic,

chartaceous; spring leaves elliptic to oblong-elliptic,

1.5-1.8

x c.0.7cm, apex

shortly acute or acuminate, margin entire, ciliate, upper surface adpressed-strigose,

lower surface paler, with a brown pannose indumentum intermixed with brownish

strigose hairs; summer leaves 5-9mm long, otherwise as for spring leaves; petioles

4-6mm, densely brownish-sericeous-strigose. Inflorescence 3-4-flowered; floral buds

viscid; pedicels 3-4.5mm, densely strigose. Calyx small, brownish-strigose, lobes cren-

ate.

Corolla funnel-campanulate, c.9mm, colour unknown; tube 4 x 3mm, outer

surface hairy, inner surface glabrous. Stamens 5, filaments puberulent below. Ovary

strigose; style densely strigose in lower

half.

Capsule ovoid, 5-6 x c.4.5mm, strigose.

China (NE Guangxi). Map 19.

We have seen only a photograph of the type of R. viscigemmatum from which the

leaf measurements have been taken. Tan describes them as being 25-35mm long but

this does not tally with the photograph which is of the only specimen known.

Allied by the author to R. polyraphidoideum and R. mariae but apparently closer

to R. minutiflorum, a species that also occurs in Eastern Guangxi, in the same general

area as the type of R. viscigemmatum.

59*.

R. hejiangense M.Y.He, Bull. Bot. Res. N.E. Forest. Inst. 5(4): 118 (1985). Type:

China, S Sichuan, HejiangXian, Fubaodawuji Banchanggou,

23"

v 1980, Agricultural

Exp.

44 (holo. SZ, n.v.).

Shrub,

elm; young shoots densely reddish-strigose. Leaves subcoriaceous, oblong,

1-2,5 x 0.7-1.3cm, apex acute, mucronate, base rounded, margin recurved, upper

surface sparsely strigose, the hairs sometimes restricted to the base of the midrib,

lower surface yellowish-brown-strigose; petioles 3mm, strigose. Inflorescence 3-6-

flowered; pedicels c.6mm, densely reddish-strigose. Calyx minute. Corolla funnel-

campanulate, white, with purple flecks on the upper lobes, c.llmm; tube c.6mm,

slightly strigose on outer surface, puberulous within. Stamens 5, filaments glabrous.

Ovary densely sericeous-strigose; style sparsely strigose in lower

half.

China (S Sichuan). Map 19.

This species should key down to R.viscigemmatum but it may be distinguished by

its white flowers, glabrous filaments, etc. Since we have not seen the types of either

RHODODENDRON SUBGENUS TSUTSUSI 135

species we are not certain whether there is a true affinity between them although we

note that there is a marked disjunction in their ranges.

60.

R. minutiflorum Hu in J. Arnold Arb. 12:155 (1931). Type: China, Guangxi, Chu-

feng, N of Huchen hsien 1120m, 9 vi 1928, R.C. Ching 5860 (holo. PE).

Shrub,

to 2.3m; young shoots with dense flattened adpressed reddish-brown setose

hairs.

Leaves monomorphic, subcoriaceous, broadly obovate to oblong, 0.7-1.1 x

0.3-0.5cm,

1.4-2.3

x as long as broad, apex shortly acuminate, base cuneate, margin

revolute and minutely crenulate, upper surface setose, lower surface paler, setose on

midrib and margin, otherwise glabrous; petioles c.2mm, setose. Calyx c.lmm, setose,

lobes rounded. Corolla funnel-shaped, colour unknown, c.6mm; tube c.2.5mm, outer

surface reddish-hairy, glabrous within. Stamens 5, long-exserted, filaments puberulent

below. Ovary densely

setose;

style setose below. Capsule not known.

China (Guangxi). 900-1120m. Map 19.

myrsinifolium is closely allied to this species and may be conspecific (q.v.).

61.

R. myrsinifolium [Ching ex] Fang & He, Bull. Bot. Res. N.E. Forest. Inst. 2(2): 88

(1982).

Type: China, Guangxi, Fang-Cheng Xian, Nalexiang, Marxia, 1000m, 26 iv

1956,

Hopu PI. Exp. 2511 (holo. PE, iso. IBSC.)

Syn.: R. caespitulum P.X.Tan, Survey Gen. Rhododendron S. China

110,

f.26 (1983). Type as for R. myrsinifolium.

Small shrub, to 1.5m; young shoots covered with adpressed flattened brown hairs.

Leaves monomorphic, persistent, coriaceous, elliptic to obovate, 0.6-0.8 x 0.3-0.5cm,

1.6-2 x as long as broad, apex acute, base cuneate, margin obscurely crenate, both

surfaces glabrescent, lower surface paler, with a few hairs on midrib; petiole l-2mm,

indumentum as for shoots. Inflorescence 2-3-flowered; pedicels c.4mm long, densely

brownish-setose. Corollacampanulate, purple, c.lOmm; tube c.4mm long, 2mm wide,

glabrous. Stamens 5, exserted, filaments glabrous. Ovary strigose; style setose below.

Capsule not known.

China (Guangxi). 1000m. Map 19.

Known only from the type. Allied to R. minutiflorum but differing in the smaller,

coriaceous leaves.

62.

R. unciferum P.X.Tan, Guihaia 2: 73 (1982). Type: China, Guangxi, Heng Xian,

Maan Shan, 740m, Z.Z. Chen 50300 (iso. KUN).

Much-branched shrub; young shoots densely adpressed-strigose. Leaves possibly

dimorphic, ovate to broadly elliptic, 2.5-3 x c.

1.2cm,

2-2.4 x as long as broad, apex

acute,

base cuneate, upper surface ± glabrescent though with some indumentum

persisting on midrib, lower surface with adpressed strigose hairs, scattered on lamina,

dense on midrib; petioles 3-4mm, adpressed-strigose. Inflorescence 8-12-flowered;

pedicels c.3mm, brown-strigose. Calyx minute, brown-strigose. Corolla probably cam-

panulate, colour unknown, c.l2mm; tube c.5 x 3mm, glabrous. Stamens 5, filaments

136 EDINB.

BOT. 47(2)

glabrous, anthers with unciform basal appendages. Ovary densely strigose; style gla-

brous.

Capsule unknown.

China (Guangxi). 740m. Map 20.

Known only from the type. The isotype seen

insect-damaged; the few remaining

anthers apparently lack

the

appendages described

by Tan.

Probably close

to R.

minutiflorum

but

with larger leaves and with more flowers per inflorescence.

63.

tsoi Merrill agg.

Shrub,

l-2m; young shoots covered with adpressed brownish strigose hairs. Leaves

thinly

thickly coriaceous, monomorphic

? to

dimorphic, elliptic

broadly ovate;

spring leaves

1.3-2.2

0.6-1.4cm,

1.5-2.2

x as

long

broad, apex rounded

acuminate, margin entire, upper surface sparsely villose

setose when young, soon

glabrescent, lower surface with scattered brown strigose hairs arising from bulbous

bases,

especially

midrib; petioles 2-4mm, densely strigose. Inflorescence 3-5-flow-

ered; pedicels 2-6mm, densely strigose. Calyx 3-5mm, indumentum

as for

pedicels,

lobes c.3mm. Corolla funnel-campanulate, 12.5-20mm, rose

purple, with darker

flecks

upper lobe; tube 3-9mm long, c.3mm wide, hairy

on the

inner surface,

glabrous

outer surface. Stamens

filaments minutely pubescent below. Ovary

densely strigose; style glabrous. Capsule 9-10

5-6mm, densely strigose.

This aggregate contains several closely allied taxa, some

which have been

described

species, although all may

conspecific. As we have

not

seen two

the

crucial types

we are not

certain

the affinities

all

the

taxa. However,

present

evidence we recognize three entities within the complex.

We do not follow Tan

considering that the distinction can be made between taxa

with dimorphic

and

those with apparently monomorphic leaves. Indeed,

we are not

convinced that he has interpreted all the cited specimens within this complex correctly,

even

the distinction were

to be

maintained. Furthermore, the relative length

the

style

and

stamens

may

well reflect

the

maturity

the flowers,

and

again does

not

have any taxonomic significance.

The three entities recognized are:

1, R.

tsoi Merrill

in the

strict sense;

2, R.

poly-

raphidoideum P.X.Tan;

and

3, plants collected

in NW

Fujian province

in S

China

(R.

aff. polyraphidoideum). These may

keyed

out as

follows:-

la. Flowers c.20mm long; leaves ovate,

1.5-2.2

0.8-1.5cm

aff.

polyraphidoideum

lb.

Flowers 12-15mm long; leaves elliptic to ovate, 0.5-2 x

O.5-O.8cm 2

2a. Leaves thickly coriaceous, broadly elliptic to obovate 1.

tsoi

2b.

Leaves thinly coriaceous, elliptic 2.

polyraphidoideum

R. tsoi Merrill, Lingnan Sci. J. 13: 142 (1934). Type: China, Guangdong, Naam

Kwan Shan, Tseng-shing distr., 25 iv 1932, W.T. Tsang 20332 (iso. E, IBSC, PE)X

Syn.: R.

tingwuense

P.X.Tan, Med. Mat. Guangdong

36, f.6 (1978).

RHODODENDRON SUBGENUS TSUTSUSI

137

Type:

Guangdong, Gaoyao Xian, Dingwushan, 900m,

P.X.

Tan 7317 (holo. IBSC).

subenerve P.X.Tan var. nudistylum P.X.Tan, Survey Gen.

Rhododendron

China

108, t.29

(1983). Type: China,

Guangdong, Huiyang Xian, Lianhua Shan, 11-31 viii 1935,

W.T. Tsang 25586 (holo. IBSC, iso. A).

Leaves weakly dimorphic, thickly coriaceous; spring leaves 15-18

9-1 lmm, apex

rounded

acute. Corolla 8-10mm long.

China (Guangdong). Map 20.

R. polyraphidoideum P.X.Tan, Bull. Bot.

Res.

N.E. Forest. Inst.

2(4): 84,

f.4 (1983).

Type:

China, Fujian, Congan Xian, Singan chuen,

1975,

L.G. Li

(L.K.

Lee) 75103

(holo.

Inst. Mat. Med. Fujian, iso. PE).

Syn.: ? R.

crassimedium

P.X.Tan, Bull. Bot. Res. N.E. Forest. Inst.

2(1):

96 (1982). Type: China, Jiangxi, Suichuan Xian, in

summo montium, 1000m, 27 iv 1959, S.S.Lai (S.S. Lei) 279

(holo.

LBG, n.v.).

?R.

hypoblematosum

P.X.Tan, Bull. Bot. Res. N.E. Forest. Inst.

2(1):

90, f.2 (1982). Type: China, Jiangxi, Suichuan, Jinggang

Shan, 1000m, S.S. Lai (S.S. Lei) 660055 (holo. LBG, n.v.).

Leaves dimorphic, thinly coriaceous; spring leaves elliptic, 15-18 x c.6mm.

Corolla

12-14.5mm.

China (Fujian, Jiangxi). Map 20.

While Tan describes R.

crassimedium

as having monomorphic leaves the figure

cited suggests that they could have been dimorphic. The one specimen seen of R.

hypoblematosum

(S.S. Lei 3965) closely resembles the type of R.

polyraphidoideum

its elliptic, thinly coriaceous leaves. However, from the cited figure, the type of R.

hypoblematosum

appears to be closer to R. tsoi.

R. aff. polyraphidoideum. Based on two specimens from China, NW Fujian, La

Touche

(E);

Pikeng, Wuyi Mts, 25 v 1988, L.G. Ling 10343 (E).

Leaves strongly dimorphic, thinly coriaceous; spring leaves broadly ovate, up to 22

x 14mm, apex blunt to subacute.

Corolla

up to 20mm.

Map

20.

Known only from two specimens. Further material is required to confirm the

constancy of

the

differences mentioned above.

64.

R. gratiosnm.P.X.Tan, Survey Gen. Rhododendron S. China 105, f.27 (1983).

Type: China, Guangxi, Beilun, 590m, 22 iv 1956, Hopu

PI.

Exp. 2463 (holo. IBSC).

Shrub, 3m; young shoots covered with adpressed grey-brown hairs, becoming glab-

rous.

Leaves

dimorphic, coriaceous, elliptic; spring leaves 2-2.8 x clem, 2-2.8 x as

long as broad, apex mucronate, base acuminate to acute, upper surface with a few

strigose hairs, especially on midrib, lower surface more densely strigose; summer

leaves smaller, 16-19 x

8-9mm;

petioles 3-6mm, strigose.

Inflorescence

5-6-flowered;

138 EDINB.

BOT. 47(2)

pedicels 4-6mm, covered with brown strigose hairs. Calyx indumentum as for pedicels.

Corolla funnel-campanulate, pale purple or red,

16mm; tube 9

2.5-3mm, glabrous.

Stamens

filaments glabrous. Ovary densely strigose; style glabrous. Capsule

not

known.

China (Guangxi, Guangdong). Map 20.

65.

R. huiyangense Fang & M.Y. He, Bull. Bot. Res. N.E. Forest. Inst. 3(1):

(1983).

Type: China, Guangdong, Huiyang Xian, Bai-yun-zhang, 850m,

iii

1932,

T.M.

Tsui

129 (holo. PE, iso. K).

Shrub,

1.5m; shoots slender, covered with dense, adpressed strigose hairs, twigs

with grey-brown hairs, becoming glabrous. Leaves

dimorphic, thick, coriaceous,

obovate-elliptic, 1-3.5

0.6-2cm,

1.7-1.8

as long as broad, apex blunt mucronate,

base obtuse

cuneate, margin entire, upper surface

leaf almost glabrous, with

few scattered chestnut hairs on midrib, lower surface with scattered chestnut adpressed

hairs, especially on midrib; petiole 4-7mm, densely covered with brown strigose hairs.

Inflorescence 8-10-flowered; pedicels 2-4mm, densely covered with dark brown bristle-

like hairs. Calyx cup-shaped, indumentum

as for

pedicels. Corolla funnel-shaped,

glabrous, red, 15mm, lobes oblong; tube c.7mm. Stamens 5, unequal, filaments flat-

tened, papillate. Ovary ovoid, densely covered with dark brown bristle-like hairs; style

glabrous. Capsule not known.

China (Guangdong). Map 20.

Allied

to R.

tsoi and

chunii but differing in the larger leaves, etc.

66.

tsusiophyllum Sugimoto,

Jap. Bot. 31:

(1956). Type: Japan,

'in

Nippon

mediae montibus Hakone, Tanaka & Ycutschima' n.v.

Syn.: Tsusuiophyllum tanakae Maxim., Rhododendr. As. Orient.

12,

t.3 (1870)—basionym.

tanakae (Maxim.) Ohwi, Fl. Japan 889 (1953)

Bull. Nat.

Sci. Mus. Tokyo 33: 81 (1953)

comb, invai, non

tanakai

Hayata, Ic. PL Formosan. 4: 15 (1914).

la: Togashi et al., Species Rhododendron Japan 198-201 (1982).

Dwarf

shrub,

to c.30cm; young shoots covered with adpressed flattened strigose hairs.

Leaves

monomorphic, obovate, 1-1.2 x 0.5-0.7cm, 1.7-2 x as long as broad, apex

acute,

base cuneate, margin entire, ciliate, upper surface + glabrous when mature,

lower surface with a few strigose hairs on midrib, otherwise glabrous; petiole c.lmm,

strigose.

Inflorescence

1-4-flowered;

pedicels very short, apparently hairy. Calyx

minute,

lobes

ciliate.

Corolla

(4-)5-lobed, tubular-campanulate, pink

in bud,

becoming

white, c.9mm; tube c.6mm, broadest towards base, pubescent on outer surface. Sta-

mens

(4-)5,

as long as corolla, filaments pubescent in lower

half.

Ovary

strigose; style

glabrous.

Capsule

c.5mm, ovoid.

Japan (S Honshu and adjacent islands). Open slopes. Map 8.

A distinct species, apparently without close relatives. The combination R. tanakae

(Maxim.) Ohwi is apparently invalid as the source of the basionym was not fully cited.

RHODODENDRON SUBGENUS TSUTSUSI 139

DOUBTFUL

OR INCOMPLETELY KNOWN TAXA

R. bellum W.P.Fang & G.Z.Li, Bull. Bot. Res. N.E. Forest Inst. 4(1):

3, t.3

(1984).

Type: China, NE Guangxi, Xingan

Xian,

800

16 v

1982,

G.Z.Li

11526

(holo.

IBK).

Shrub, 2-3m; young shoots glabrescent. Leases chartaceous, elliptic to oblong-elliptic,

3-5

1.2-2.5cm,

apex acute, mucronate, base broadly cuneate

rounded, upper

surface glabrescent lower surface pale, sparsely strigose

first, soon glabrescent;

petioles c.5mm, sparsely strigose. Inflorescence 2-4-flowered; pedicels

8-10mm,

densely brown-strigose.

Calyx

c. 1 mm, lobes rounded, strigose.

Corolla

funnel-shaped,

purple, 30-33mm; tube 15-18 mm,

3-4mm

wide

base, glabrous. Stamens 10, fila-

ments glabrous.

Ovary

brown-hairy; style glabrous.

China (Guangxi, Guangdong). 800-1900m.

Allied by the authors

simsii

but distinguished from that species by the purple

flowers and stamens with glabrous filaments.

bellum

may be

hybrid between

simsii

and R.

mariae

subsp.

kwangsiense,

both of which occur

to the type locality.

It may also

be be

allied

to R.

subflumineum,

from which

differs

by its

glabrous

stamens.

noted that the single specimen cited by the authors from Guangdong Province,

Tan,

P.X. 60326 (not seen by us) was referred

simsii

by the collector.

R. chaoanense D.C. Wu & P.X. Tan, Med. Mat. Guangdong 4:35,

f.4

(1978). Type:

Guangdong: Chaoan Xian,

dumeto montis, 28

1975, D.C. Wu {T.C. Wu) 902

(holo.

Herb. Inst. Mat. Med. Guangdong, n.v.).

Apparently close to R.

simsii

but differing in its obscure calyx lobes, 7 stamens and

longly exserted style.

China (Guangdong). Only known from the type.

Apart from the minute calyx this species closely resembles

simsii

and could

a hybrid of it.

R. litchifolium D.C. Wu & P.X. Tan, Med. Mat. Guangdong 4:35,

f.3

(1979). Type:

China, Guangdong, Haifeng Xian, Lien

Hua

Shan,

4 iii

1975, D.C. Wu (T.C.

Wu)

900 (holo. Herb. Inst. Mat. Med. Guangdong, n.v.).

This species

said

by the

authors

resemble

mariae

but it

differs

in the

shining leaves with whitish-grey strigose indumentum and in the corolla with acute

mucronate lobes. Since we have not seen the type we cannot confirm the affinities

this species, which is known only from the type.

R. nanpingense P.X.Tan, Bull.

Bot.

Res. N.E. Forest. Inst. 2(4):

(1982). Type:

China, Fujian, Nanping, 18 iii 1931, Y. Ling 2300 (holo. IBSC, n.v.)

la: Tan, Survey Gen. Rhododendron S. China f.8 (1983).

This may

synonymous with

mariae;

the

specimen seen, (Ling,

2204)

etiolated. The key accompanying the type description suggests that this species may

be distinguished from R.

mariae

by its style which

supposed

be about the same

length

the stamens.

In R.

mariae

the style

supposedly longer than the stamens.

140 EDINB. J. BOT. 47(2)

The proportional length of style and stamens is an unreliable character as it apparently

depends on the age of the flower. Both the specimens cited by Tan under R. nanpingense

are also cited under R. seniavinii.

R. obtusum (Lindley) Planchon, Fl. Des. Serres 9: 80 (1854). Type: a plate, Bot. Reg.

32 t. 37 (1846), prepared from a plant grown in the Royal Horticultural Society

Garden, sent by Fortune in 1844 from Shanghai.

Syn.: Azalea obtusa Lindley, J. Hort. Soc. Lond. 1: 152, (1846); Rho-

dodendron indicum Sweet var. obtusum (Lindley) Maxim., Rho-

dodendr. As. Orient. 40 (1870).

Azalea amoena Lindley, Paxton's Fl. Garden 3: 81, t.182 (1852);

Rhododendron amoenum (Lindley) Planchon, Fl. Des. Serres

9:80 (1854); R. indicum Sweet var. amoenum (Lindley) Maxim.,

Rhododendr. As. Orient. 40 (1870); R. obtusum Planchon f.

amoenum (Lindley) Wilson, Monograph Azaleas 32 (1921).

Type: a plant grown by Standish and Noble of Bagshot, exhi-

bited in the R.H.S., originating from plants sent by Fortune

from a nursery near Shanghai.

f/mnfor^ii Planchon, Fl. Des. Serres 9: 78 (1854), nom. nud.

macrostemon Maxim., Rhododendr. As. Orient.

41,

t. 3 (1870).

Syntypes: Japan, Hondo Prov., Musashi; Tokyo, cult. 1862

(iso.

K, n.v.).

obtusum and many of the forms and varieties described within it are cultivated

selections of R. kaempferi, of R. kiusianum or of hybrids between these two species.

Since the derivation of the cultivated type of R. obtusum is not certain, neither R.

kaempferi nor R. kiusianum can be safely synonymized with it. It therefore seems wise

to treat R. obtusum as a group of cultivars, some of which may have a complex

parentage.

The Kurume Azaleas may have arisen from the same complex of species.

R. petilum P.X.Tan, Survey Gen. Rhododendron S. China 101 (1983). Type: Fujian,

Nanping Xian, Wen-Ian, in declivitate, in cultis, 9 iii 1973, L.G. Li (L.K. Lee) 73009

(holo. Inst. Mat. Med. Fujian).

Differs from R. simsii in its slender, elongate branches, smaller flowers, 23mm long,

with crenulate calyx lobes, and in regular pale red corolla.

China (Fujian); known only from the type.

The single collection of this species was made from cultivated ground, and it seems .

probable that it is a hybrid of R. simsii.

R. pinetorum P.X.Tan, Bull. Bot. Res. N.E. Forest. Inst. 2(1): 93 (1982). Type: China,

Hunan, Huitong Xian, in sylva Pini massonianae, 31 vii 1956, Huang, De Zhen (Teh-

Cheng Wong) 247 (holo. IBSC).

Shrub; young shoots covered with glandular strigose and puberulous spreading hairs.

RHODODENDRON SUBGENUS TSUTSUSI 141

Leaves

dimorphic, subcoriaceous; spring leaves oblong ovate-oblong 4-6 x

1-1.3cm

2.2-2.4 x as long as broad, apex acuminate, base cuneate, margin revolute, ciliate,

upper surface glabrescent except for a puberulous

midrib,

lower surface with a bistrat-

ose indumentum, the upper layer brownish-strigose, the lower densely

pilose;

summer

leaves similar but smaller, 20-30 x 10-12mm; petioles 6-8mm, brownish, glandular-

strigose. Flowers unknown. Calyx in fruit with linear subulate lobes c.5mm long.

Capsule

oblong, c.10 x 3mm, densely spreading-glandular-strigose; pedicels 15-

18mm; style glabrous.

China (Hunan). Pine forests.

A distinctive species but without

flowers

its affinities are uncertain.

R. polyraphidoideum var. montanum P.X.Tan, Bull. Bot. Res. N.E. Forest. Inst. 2(4):

(1982).

Type:

Guangxi, Darning shan,

viii

1951,

B.X. Cai{C.S.

Tsai) 5401

(holo.

IBSC,

n.v.).

cannot confirm that

var.

montanum

is related to

var.

polyraphidoideum;

the only

specimen seen

(Cai,

C.X. 5154) has no flowers or fruit. Indeed, it seems more likely

that it may

allied to R.

viscigemmatum,

although it probably differs in its spreading-

strigose hairs on the stems and petioles and its non-viscid floral buds.

R. x pulchrum Sweet, Brit. Fl. Garden ser. 2,2: t.117 (1832). Described from a plant

raised from seed by Mr Smith of

Kingston;

the type is presumed to be the plate cited

above.Syn.: R.

indicum

(L.) Sweet var. smithii Sweet, Hort. Brit. ed. 2: 343

(1830)—basionym for

pulchrum;

phoeniceum

smithii

(Sweet) Wilson in Wilson & Rehder, Monogr. Azaleas 62

(1921).

According to Sweet

this is

a hybrid between R.

ledifolium

and the old red R.

indicum.

This taxon may be loosely grouped with the 'Azalea indica' hybrids though it is not

certain that they have the same parentage.

R. rhodanthum M.Y.He, Bull. Bot. Res. N.E. Forest. Inst. 5(4): 116 (1985). Type:

China, Hunan, Lingling Xian, Yangmingshan, Huang- jiang-yuan, 300m, 9 iv 1942,

Y.Tsiang

S.Q.Chen

670 (holo. IBSC, n.v.).

Shrub, elm; young shoots yellowish-brown-strigose.

Leaves

chartaceous, elliptic to

oblong-elliptic, 3-4 x

1-1.5cm,

apex acuminate, mucronate, base sub-cuneate, when

young densely brown-sericeous-strigose on both surfaces, becoming sparsely brown-

strigose above; petioles 2-4mm, brown-strigose.

Inflorescence

1-2-flowered;

pedicels

c.7mm long, densely brown-sericeous-strigose. Calyx with lobes ovate, strigose. Cor-

olla

funnel-campanulate, rose, with darker flecks, 23mm; tube c.14 x 3mm sparsely

villous on outer surface.

Stamens

6-7, puberulent in lower

half.

Ovary

densely brown-

sericeous-strigose; style strigose in lower third.

Known only from the type. Allied by the original authors to R.

yangmingshanense

but apparently closer to R.

subflumineum,

from which it differs in its hairy corolla

tube and style. The 6-7 stamens may suggest that this is a hybrid between R. mariae,

142 EDINB. J. BOT. 47(2)

with 5 stamens, and a species with 10 stamens. P.X. Tan assigned this type specimen

to R. simsii.

R. saxatile B.Y.Ding & Y.Y.Fang, Bull. Bot. Res. N.E. Forest. Inst. 7(1): 29 (1987).

Type:

China, Zhejiang, Pingyang Xian, Nanyangdang, 60-400m, 11 v 1985. B.

Y.Ding

4082 (holo. HZU, n.v.).

Shrub,

30-120cm; young shoots densely covered with red spreading strigose hairs

intermixed with crisped pubescent hairs. Leaves subcoriaceous, dimorphic; spring

leaves ovate-elliptic to ovate, 2-5 x

1-2.5cm,

apex acute, base rounded to broadly

cuneate, upper surface strigose, soon glabrescent, lower surface strigose and sericeous;

summer leaves 10-20 x 7-12mm, otherwise as for spring leaves; petioles 2-6mm,

indumentum like that of young shoots. Inflorescence 2-5-flowered; pedicels c.5mm,

densely strigose and crisped-pubescent. Calyx small, densely crisped-sericeous and

strigose. Corolla funnel-shaped, white, with red flecks on the upper three lobes, 15-

18mm; tube 5-8mm. Stamens 5, filaments glabrous. Ovary densely brown-crisped-

sericeous; style glabrous or sparsely hairy at base.

China (Zhejiang). Rock fissures and woodland, 60-400m.

The original authors considered that this species was distantly allied to R. rufulum.

However, from the description R. saxatile seems to key down with R.jinxiuense. This

is clearly a distinct species, geographically isolated from its possible allies. Without

access to the type specimen we are unable to confirm its exact affinities.

R. seniavinii var. crassifolium P.X.Tan, Survey Gen. Rhododendron S. China 110

(1983).

Type: China, Jiangxi, Suichuan Xian, S.S. Lai (S.K. Lai) 5361 (holo. IBSC).

Both specimens cited by Tan are in fruit and may not be related to var. seniavinii.

Both could be a form of

chunii, with a denser but coarser indumentum and longer

pedicels. They also closely resemble R. hypoblematosum but have a thicker leaf texture.

Since flowering material of this taxon is not available we hesitate to assign these two

specimens to a species.

R. sparsifolium W.P. Fang, Acta Phytotax. Sin.

21:

462 (1983). Type: China, Sichuan,

Hejiang, Fubaolinchang, 800-1000m, 19-22 v 1981, Q.J. Tian ei al. 2-38, 3-14, 1-

21,

n.v.

Shrub,

c.3m; indumentum of young shoots unknown. Leaves dimorphic, coriaceous,

persistent, oblong-elliptic to elliptic, 2.5-3.5(-4) x 0.8-1.2cm, apex acuminate, base

cuneate, margin entire; upper surface glabrous, lower surface

pale,

finely hairy; petioles

c.3mm, glabrous. Inflorescence 5-7-flowered; pedicels 10-15mm, densely yellowish-

hairy. Calyx c.3mm hairy, lobes ovate. Corolla funnel-shaped, c.l5mm, rose; tube 6-

8mm, glabrous. Stamens 5, shorter than corolla, filaments glabrous. Ovary densely

hairy; style hairy in lower

half.

Capsule unknown.

China (Sichuan). 800-1000m.

Known only from the specimens cited above which we have not seen. Distantly

allied by the author to R. seniavinii, but with smaller leaves and with hirsute pedicels

and ovaries.

RHODODENDRON SUBGENUS TSUTSUSI

143

Section Brachycalyx Sweet, British

Fl.

Garden ser.2,l:95 (1831).

Syn.: Sect. Azalea Subser. Schlippenbachii

p.p.

Sect. Verticillatae Nakai, Trees Shrubs Japan

ed.l:

(1922).

Lectotype:

reticulatum

D. Don

(see Hara

in J. Jap. Bot. 49:

354,

1974).

Subsect. Brachycalyces (Sweet) Spethmann,

Syst. Evol.

157:28 (1987).

Type species

section: R.farrerae.

la. Leaves ovate

oblong-lanceolate, broadest below middle;

stamens

10;

ovary

not

glandular (China)

Leaves usually ovate-rhombic, broadest

about

the

middle;

stamens 5-10; style and/or ovary sometimes glandular

2a. Leaves with

thin floccose indumentum beneath; calyx lobes

distinct

3. daiyunicum

Leaves villose beneath at first, soon glabrous; calyx lobes

indistinct _ 3

3a. Leaves

1.5-3cm;

petioles l-3mm, densely

villose;

corolla pale

purple or lilac 2.

farrerae

Leaves 3-5(-8)cm; petioles ± glabrous, 5-20mm; corolla rose-

purple

1. mariesii

4a. Flowers appearing before or after the leaves, red to deep rose-

pink 15

Flowers appearing before or with leaves, magenta to rose-

purple 5

5a. Style stipitate-glandular below 4.

wadanum

Style eglandular, sometimes pubescent below 6

6a. Ovary at least partly glandular 7

Ovary pubescent, eglandular __ 10

7a. Stamens 5 5.

dilatatum

Stamens (8-)10 8

8a. Calyx minute, ciliate; lower surface of

leaves

with scattered ,

adpressed hairs or glabrous 9

Calyx c.3 mm, sometimes ciliate; lower surface of leaves

adpressed-hairy, hairs longer on nerves 6.

hidakanum

9a. Petioles glandular; leaves rhombic; young shoots

glabrous 7.

decandrum

Petioles eglandular, pilose, at least when young; leaves broadly

ovate-rhombic, acute; young shoots hairy

8.viscistylum

10a. Corolla 30-40mm; inflorescence 2-4-flowered

14. weyrichii

Corolla 20-30mm; inflorescence

1-2-flowered

' 11

lla. Petioles pilose, sometimes densely so 12

144 EDINB.

BOT. 47(2)

Petioles glabrous,

least

lower part

12a. Petioles and basal part

leaf midrib pilose, sometimes

sparsely so

reticulatum

Petioles and basal part of leaf

midrib

densely lanate or

villose

12. nudipes

13a. Leaf apex acuminate, lamina sparsely covered with brown

hairs when young; capsule 4-5mm broad

10.

kiyosumense

Leaf

apex

acute, lamina glabrous or hairy beneath when

young; capsule 2-3mm broad 14

14a. Pedicels and calyx densely pilose; leaves glabrous beneath,

even when young, midrib pilose below

11. mayebarae

Pedicels glabrous above; leaves adpressed-hairy beneath when

young, midrib densely villose near base

12. nudipes

15a. Flowers deep rose-pink

14. sanctum

Flowers red

15. amagianum

R. mariesii Hemsley

Wilson, Kew

Bull.

1907:244

(1907).

Syntypes: China, Hubei,

200-600m,

Wilson

29 (E); Chongyang, Henry

521A

(E), 5947 (K); Badong (Pating),

Henry 1422 (K); Nanto, Henry 3829 (K); Jiangxi, Kiukiang (Jiujiang

?),

Maries,

n.v.

Syn.: R.

umbelliferum

Levl., Repert. Spec. Nov. Regni Veg. 12: 102

(1913).

Type: China, Guizhou, Pin fa, 2 iv 1902,

Cavalerie

(holo.

E).

shojoense

Hayata, J. Coll. Sci. Imp. Univ. Tokyo 30: 174

(1911).

Type: Taiwan, Nantou,

Kawakami

Mori 1160, n.v.

gnaphalocarpum

Hayata, Ic. PI. Formosan. 3: 132 (1913).

Type: China, Fujian, Isan, 1910,

Nagasawa

239,

n.v.

Shrub or small tree, l-3m; young shoots at first covered with adpressed yellowish

hairs,

becoming glabrous and grey. Leaves deciduous, ovate-lanceolate, sometimes

broadly ovate, 3-7.5 x 2-4.5cm, apex acute, upper surface dark green, lower surface

pale;

petioles 5-20mm, glabrous.

Inflorescence

1-2-flowered,

flowers

appearing before

leaves; pedicels

5-8mm,

enclosed by bud scales, villose. Calyx minute, covered with

grey/yellowish adpressed hairs.

Corolla

funnelform, 25-30mm, rose-purple, upper

lobe spotted, 20-25mm, oblong. Stamens 10, equal, glabrous.

Ovary

yellowish-grey-

villose; style glabrous.

Capsule

c.lOmm, cylindric, villose.

China

Hubei,

E Sichuan, Guizhou, Guangxi, Guangdong, Fujian, Hunan, Jiangxi,

Zhejiang, Auhui), Taiwan. Cliffs and thickets, 200-1300m. Map

21.

Differing from

farrerae

in its larger leaves and longer, glabrescent petioles and

pedicels. Specimens from E Sichuan and W Hubei have broader, ovate-lanceolate

leaves that apparently flush while the

flowers

are open; the remainder of

the

material

has rhombic leaves that apparently flush after the flowers have opened. However,

there are no other morphological differences between these two groups of plants so

we are hesitant to describe them as separate entities without further field studies.

RHODODENDRON SUBGENUS TSUTSUSI 145

farrerae Tate apud Sweet, Brit. Fl. Garden ser.

l,t.95 (1831). Type:

plant

introduced by Capt. Farrer from China in 1829 (n.v.).

Syn.: Azalea farrerae (Tate) Koch, Dendr. 2(1): 178 (1872).

Rhododendron farrerae Tate var. leucotrichum Franchet,

Bot.

(Morot) 394 (1895). Syntype: China,

Sichuan, aux environs

de Tchen-keou-tin, Farges 50, 846, n.v.

Azalea squamata Lindley, J. Hort. Soc. Lond. 1:152 & Bot. Reg.

t.3 (1847). Type: China, Hongkong,

Victoria, 550m, Tate

(holo. BM).

Rhododendron cinereoserratum P.X.Tan, Bull. Bot. Res. N.E.

Forest. Inst. 2(4):

(1982). Type: China Fujian, Nanjing

Xian, Hexi, Ling hai, Univ. Amoy 20 (holo. Amoy Univ.)

Ic:

Tan, Survey Gen. Rhododendron S. China f.22,2 (1983).

Dwarf shrub; young shoots becoming glabrous. Leaves ovate, 1.5-3

l-2cm, apex

acute, upper and lower surface with long brown hairs, becoming glabrous; petioles

l-3mm, densely villose. Inflorescence 1-2-flowered; pedicels short, hidden by bracts,

densely villose. Calyx minute, densely villose. Corolla open-campanulate, pale purple

or lilac, upper lobe spotted, 20-30mm, lobes 15mm, broadly oblong. Stamens

10,

unequal, glabrous. Ovary densely hairy; style glabrous. Fruit not known.

China

Guangxi, Guangdong, Fujian, Jangxi, Hunan). Mixed woodland, 600m.

Map 22.

Forms with more

less crenate leaves have been referred

to R.

cinereoserratum

Tan, the type

which has unusually narrow leaves. However, there are specimens

with broader but toothed leaves and there are also analagous forms

of R.

mariesii.

not therefore consider that there

any justification

maintaining

ciner-

eoserratum as

distinct taxon.

daiyunicum P.X.Tan, Bull. Bot. Res. N.E. Forest. Inst. 2(4):

(1982). Type:

China, Fujian, Dehua Xian, prope Catervam Daiyuan,

20 iv

1975,

L.K.

Ling 3040

(holo. Fujian Normal Univ.)

Syn.:

daiyuenshanicum P.X.Tan, Survey Gen. Rhododendron

China 96, f.22,

(1983). Type as above.

Shrub; young shoots becoming glabrous. Leaves coriaceous, oblong-lanceolate, 2.8-

3.8

1.3-1.7cm,

apex slightly acute, upper surface greenish, opaquely brown when

dry, lower surface paler below, covered with thin lanate indumentum, with the midrib

setulose; petioles 3-4mm, densely brownish, strigose with some longer setose hairs.

Inflorescence

1-flowered;

pedicels 6-8mm, densely strigose. Calyx densely brown-

strigose, lobes crenulate, 5mm. Corolla obliquely funnel-campanulate, rose, c.25mm,

lobes 20-22mm, obovate-oblong. Stamens 10, filaments puberulent. Style glabrous.

Fruit not known.

China (Fujian). Map 22.

Known only from the type. Allied

R. farrerae but differing

several distinctive

characters.

146 EDINB.

BOT.

47(2)

wadanum Makino,

Jap.

Bot. 1: 21

(1917).

type cited.

Syn.:

glandulistylum Komatsu,

Bot.

Mag. (Tokyo) 32:

(1918)—

Japanese text.

wadanum Makino var. leucanthum Makino,

Jap.

Bot. 3:11

(1926)—English text. Type: Japan, Prov. Sagmai, Hakone,

Sawada,

n.v.

reticulatum D.Don

var.

wadanum (Makino) Hatusima,

Sci.

Rep.

Yokosuka City Mus. 15:

(1969).

la: Togashi

al., Species Rhododendron Japan 82-84 (1982).

Shrub

small tree; young shoots villose. Leaves rhombic,

3-5 x

2-4cm, apex acute

but with blunt tip, upper surface sparsely villose when young, soon glabrescent, lower

surface sparsely villose, more densely

so on

midrib; petioles 4-7mm, densely villose.

Inflorescence

1-2-flowered,

flowers appearing before leaves; pedicels 3-10mm, with

eglandular

glandular hairs. Calyx minute, ciliate. Corolla funnel-campanulate, rich

rose-pink, 22-30mm. Stamens 10, unequal, filaments glabrous. Ovary densely villose;

style stipitate-glandular

lower

half.

Capsule

8-15 x

4-5mm.

Japan

(SE

Honshu). Mixed forest, 950-1500m. Map 23.

A distinct species

account of its glandular style.

white-flowered form has been

referred

var. leucanthum Makino.

dilatatum Miquel, Ann. Mus. Bot. Lugduno-Batavum. 1: 34 (1863). Type: Japan,

Siebold,

n.v.

la: Togashi et al., Species Rhododendron Japan 61-64 (1982).

Shrub or small

tree;

shoots

glabrous.

Leaves

rhombic,

3-5 x

1.5-3.5cm,

apex acumin-

ate,

both surfaces covered with adpressed pilose hairs when young, at maturity upper

surface glabrous, lower surface with sparse pilose hairs; petioles 3-5mm, papillate.

Inflorescence

1-3-flowered,

flowers

appearing before

leaves;

pedicels

5-8mm,

covered

with adpressed brown hairs and

glands.

Calyx

minute,

glandular, lobes

ciliate.

Corolla

open funnel-shaped, 20-30mm, rose-purple, lobes 15-25mm, oblong. Stamens 5,

filaments glabrous.

Ovary

glandular; style glabrous.

Japan (S Honshu), c. 1000m. Map 24.

Rehder states that the type lacks flowers. Therefore our concept of R. dilatatum

follows that of Maximovicz (in

Rhododendr.

As.

Orient.

27, 1870).

R. hidakanum Hara, J.

Jap.

Bot.

49: 353

(1974).

Type:

Japan Hokkaido, Maruyama,

Shoya, 80m,

ix 1974, Hara et

al.

(holo. TI, n.v.).

Syn.: R.

dilatatum

Miquel var.

boreale

Sugimoto, New Keys Woody

PL Japan 509 (1972). Type as above.

la: Togashi et al., Species Rhododendron Japan 70-73 (1982).

Shrub, to 3m; young shoots greyish, + glandular, later glabrescent.

Leaves

broadly

rhombic-ovate, 2.5-6 x

1.5-5cm,

apex shortly

cuspidate,

base broadly

cuneate,

upper

surface sparsely glandular ar first, covered with long white hairs, later glabrescent,

with persistent hair

bases,

lower surface

pale,

with adpressed

hairs,

or glabrous though

with minute papillate glands and long

hairs

on the

nerves;

petioles 5-12mm, glandular.

RHODODENDRON SUBGENUS TSUTSUSI 147

Inflorescence 1-3-flowered; pedicels l(M5mm, glandular, pilose below. Calyx c.3mm,

glandular, sometimes ciliate. Corolla funnel-campanulate, 25-30mm, magenta, lobes

c.l 7mm, oblong-obovate. Stamens

10,

unequal, filaments glabrous. Ovary shortly

stipitate-glandular, with scattered pilose hairs; style glabrous. Capsule 9-11

c.3mm.

Japan

Hokkaido). Wooded mountain slopes. Map

24.

Apparently allied

to R.

decandrum

account

of its

glandular ovary

but

with

more northerly distribution. The most significant differences appear

to be in the

larger

calyx

and

less hairy leaves

of R.

hidakanum.

decandrum (Makino) Makino,

J. Jap. Bot. 1: 21

(1917)—English text. Type:

Japan, Prov. Tosa

Shikoku, Ochi,

1887, Makino,

n.v.

Syn.:

dilatatum Miq.

var.

decandrum Makino,

Bot.

Mag. Tokyo

134(1893).

inobeanum Honda,

Bot. Mag.

Tokyo

53: 383

(1939). Type:

Japan, Shikokui,

Awa

Prov. Sanakoti, 1939, Inobe (holo.

TI,

n.v.).

decandrum Makino forma lasiocarpum Hara, Enum. Sperm.

Jap.

1:29(1949).

decandrum Makino var. pilosum Hara, loc.

cit.

(1949).

dilatatum Miquel

var.

satsumense Yamazaki,

J. Jap. Bot.

56:

263

(1981). Type: Japan,

Pref.

Obsumi, Tatakuma-yama,

Nanatsudani, 400m, cult,

Tokyo, 20 v 1974, Yamazaki 2533

(holo.

TI,

n.v.).

la: Togashi

al.. Species Rhododendron Japan 58-61 (1982).

Shrub

small tree; young shoots soon glabrous. Leaves broadly rhombic, 2-3(-6)

x 2-4cm, apex acuminate, upper surface with glands, especially

midrib

and

veins,

also with

a few

scattered hairs, lower surface with scattered villose hairs

and

glands;

petioles 10-15mm, sparsely glandular, also with villose hairs. Inflorescence

1-3-flow-

ered, flowers appearing before leaves; pedicels 5-8mm, villose, densely

so at

base, also

with

glands."

Calyx minute, glandular, lobes ciliate. Corolla open funnel-campanulate,

25-28mm, magenta, spotted; lobes c.20mm, narrowly oblong. Stamens

10,

unequal,

filaments glabrous. Ovary glandular, with

a few

villose hairs; style glabrous. Capsule

8-15mm, curved.

Japan

Honshu, Shikoku). Forested hillsides, 800m. Map

24.

dilatatum

var.

satsumense

described

differing from

decandrum

in its

dilatate-ovate leaves, shining above,

in the

involucre being lightly refiexed before

anthesis,

in the

glabrescent floral buds

and in the

glandular-punctate, usually

not

ciliate, capsules.

assume that this taxon

has ten

stamens since

it has

been allied

the

original author

to R.

decandrum;

have

not

however seen

any

material

it.

viscistylum Nakai,

Bot. Mag.

(Tokyo)

49: 498

(1935). Type: Japan, Kyushyu,

prov. Osumi, Takakumayama,

5 v

1932, Sugimoto (holo.

TI,

n.v.).

Syn.:

decandrum Makino

var.

viscistylum (Nakai) Hatusima,

Sci.

Rep.

Yukosuka City Mus. 15: 21 (1969).

148 EDINB. J. BOT. 47(2)

la: Togashi et al., Species Rhododendron Japan 14-11 (1982).

Shrub, 2-3m; young shoots soon glabrescent. Leaves rhombic,

1.4-4.3

x 0.7-1.3cm,

apex acute, upper surface with a brown pilose indumentum at first, later glabrescent,

lower surface pale, with punctate glands, sometimes viscous; petioles 3-5mm, with

long eglandular hairs, at least when young. Inflorescence l(-2)-flowered, flowers

appearing before the leaves; pedicels 5-6mm, brown-pilose and glandular-verrucose.

Calyx minute, brown-ciliate. Corolla open funnel-campanulate, c.l7mm, reddish-

purple, with flecks, lobes oblong or elliptic, c.l2mm. Stamens 10, unequal, filaments

glabrous. Ovary glandular and viscous, with brown hairs at apex; style glabrous,

viscous. Capsule c.4mm.

Japan (Kyushyu). Upland forests. Map 25.

Close to R. decandrum.

9. R. reticulatum D. Don in G. Don, Gen, Syst. 3: 846 (1834). Type: A plant cultivated

by Mr Knight in 1834 (n.v.).

Syn.: R. rhombicum Miq., Ann. Mus. Lugduno-Batavum 2:164 (1865).

Type: A specimen collected by Buerger, n.v.

rhombicum Miq. var. albiflorum Makino, Bot. Mag. (Toyko)

18:

66 (1904). Type: Fl. white; Prov.Zyodaizi-yama in Sakawa

spont., iv 1885, T. Makino.

sakawanum Makino, J. Jap. Bot. 3:11 (1926). Type: as for R.

rhombicum var. albiflorum Makino.

reticulatum D. Don var. bifolium Yamazaki, J. Jap. Bot. 62:

288 (1987). Type: Japan, Shikoku, Tokoshima

Pref.,

Oshima,

Mugisho, K. Abe 35670 (holo. TI, n.v.).

reticulatum D. Don var. parvifolium Yamazaki, J. Jap. Bot.

59:209 (1984). Type; Japan, Shikoku,

Pref.

Kohchi, Takaoka-

gun, Hidaka-mura, Nishikiyama, 21 x 1942, Yashinaga 24

(holo. TI, n.v.)

la: Bot. Mag. 43: t.6972, (1887); Stevenson (ed.), Sp. Rhodod. 116 (1930).

Shrub or small tree, l-8m; young shoots soon glabrous. Leaves rhombic-ovate, 3-6

1.5-4cm,

apex acute, upper surface at first covered with short nairs, soon becoming

glabrous, lower surface with short brown hairs, mainly on midrib and veins; petioles

2-5mm, covered with brown bristle-like hairs. Inflorescence l-2(-3)-flowered, flowers

appearing before the leaves; pedicels 5-8mm covered with adpressed brown hairs,

glandular. Calyx minute, ciliate, villous, glandular. Corolla funnel-campanulate, rose-

purple, rarely white, 25-30mm, lobes 15mm, oblong. Stamens 10, unequal, filaments

glabrous. Ovary villous; style glabrous (? occasionally pubescent below). Capsule

10mm, curved.

Japan (S Honshu, Shikoku, Kyushyu). Forest hillsides, 400-700m. Map 25.

The rare white-flowered form of R. reticulatum has been called R. rhombicum var.

albiflorum Makino (R. sakawanum Makino). A form with more densely hairy leaves,

possibly approaching R. nudipes var. lagopus, has been referred to R. ciliatum of

Nakai.

RHODODENDRON SUBGENUS TSUTSUSI 149

Yamazaki distinguishes var. bifolium on its two large leaves and one smaller leaf

per whorl. This is a feature that occurs occasionally, sometimes along with normal

whorls with three equal-sized leaves, on the same plant.

reticulatum apparently hybridizes with R. tashiroi (q.v.).

10.

R. kiyosumense (Makino) Makino, Fl. Jap. ed.2: 880 (1931).

Syn.: Azalea kiyosumensis Makino, J. Jap. Bot. 6: 18 (1929); R. dila-

tatum Miq. var. kiyosumense (Makino) Hatusima, Sci. Rep.

Yokosuka City Mus. 15: 22(1969). Syntypes: Japan, Prov.

Awa, Mt Kiyosunu',1929, Suszuki, n.v.; 1929, Makino, n.v.

Rhododendron shimidzuanum [Honda ex] Makino , Fl. Jap. ed.

2:890(1931).

la: Togashi et al., Species Rhododendron Japan 67-69 (1982).

Shrub or small tree; shoots glabrous. Leaves rhombic, 3-5 x 2.5-3cm, apex acumin-

ate,

upper and lower surfaces sparsely covered with brown hairs when young, midrib

glabrous or shortly pilose beneath, margins ciliate; petioles 4-8mm, mostly glabrous,

with scattered brown hairs near leaf

base.

Inflorescence

1-2-flowered;

pedicels 3-5mm,

with scattered brown hairs. Calyx minute, ciliate. Corolla open funnel-campanulate,

20-30mm, purple, lobes 10-20mm, oblong. Stamens 10, filaments glabrous. Ovary

densely strigose; style glabrous. Capsule 4-10 x 4-5mm, curved.

Japan (E Honshu). Forests, 650m. Map 25.

11.

R. mayebarae Nakai & Hara, J. Jap. Bot. 11: 825 (1935). Type: Japan, Kyushyu

Prov., Higo, in Mt Kurobaru, 1017m, 24 iv 1927, Mabare 2159, n.v.

Syn.: R. nudipes var. mayebarae Nakai & Hara in Acta Phytotax.

Geobot. 25 (2-3): 37 (1972).

mayebarae Nakai var. obsumiense Yamazaki, J. Jap. Bot. 59:

209 (1984). Type: Japan,

Pref.

Kagoshima, Aranishiyama,

800-900m, 21 ix 1977, Takeda (holo. TI, n.v.).

la: Togashi et al., Species Rhododendron Japan 94-96 (1982).

Shrub;

young shoots glabrous. Leaves ovate-rhombic, 2.5-3 x

1.5-1.7cm,

apex acute,

upper surface at first hairy, lower surface with lamina glabrous, veins and midrib with

brown hairs, especially towards base; petioles very short. Inflorescence

1-flowered,

flowers appearing before leaves; pedicels 10-15mm, densely brownish setose-

pubescent. Calyx inconspicuous. Corolla open funnel-campanulate, c.25mm, deep

magenta, spotted, lobes c.20mm, oblong. Stamens 10, unequal, filaments glabrous.

Ovary densely brownish setose-strigose; style glabrous. Capsule 8 x 3nim.

Japan (S Kyushyu). Wooded hillsides, 600-1000m. Map 24.

Close to R. nudipes but differing in the less hairy leaf undersurfaces and the densely

pubescent pedicels. Var. obsumiense is supposed to differ in the sparsely hirsute lower

surface of its leaves. We do not consider this to be a sufficient difference to merit

recognition.

150 EDINB.

BOT. 47(2)

12.

nudipes Nakai,

Bot.

Mag. (Tokyo) 40:

484

(1926). Type: Japan, Kyushyu,

Higo,

Prov. Asosan, Ogata (holo.

TI,

n.v.).

Shrub

small tree; shoots glabrous. Leaves broadly rhombic,

2-8 x

l-6.5cm, apex

acute,

tip

blunt, upper

and

lower surfaces covered with long brown hairs when young,

becoming glabrous

upper surface; petioles 3-10mm, densely pale brown-villous

with

the

lower half glabrous,

densely lanate. Inflorescence

1-2-flowered;

pedicels

5-10mm, covered with brown pubescent hairs. Calyx minute. Corolla funnel-cam-

panulate, 20-30mm, rose-purple, lobes c.20mm, broadly oblong. Stamens

5-)8—10,

glabrous. Ovary densely pale brown-villous; style glabrous. Capsule 2-3mm, ovoid.

the

last

ten

years

number

infra-specific taxa have been published within

nudipes mostly

Yamazaki.

have

not

seen material

most

these and,

as the

type descriptions

are

inadequate

and

non-comparative,

it has not

been possible

produce

a key. The

following treatment

and

synonymy follows Yamazaki without

attempting

make

any

assessment

the validity

the taxa included.

12a. subsp. nudipes.

12ai. var. nudipes.

Syn.: R.

nagasakianum

Nakai, Bot. Mag. (Tokyo) 40: 484 (1926)

Type: Japan, Kyushyu, Nagasaki Prov., Hizen, Maximovicz

(holo.

? LE, n.v.; iso. ? BM, Hb. Hance 13570).

nagasakianum

Nakai var.

gracilescens

Nakai, op. cit. 485

(1926).

Type: Japan, Kyushyu, Mt Fugendake, montium

Unzen, Prov. Hiaen,

Anon.

(holo. KYL, n.v.).

reticulatum

D.Don var.

nudipes

(Nakai) Hatusima, Sci. Rep.

Yokosuka City Mus.

15:

23 (1969).

la: Togashi et al., Species Rhododendron Japan 86-89 (1982).

Japan (Honshu, Kyushyu). Light forest, 200-1000m. Map 23.

The Maximovicz material of R.

nagasakianum

seen at the BM, which may be an

isotype, has corollas with at least 8 stamens, not 5 as stated by Nakai. Therefore, on

the basis of

this

specimen, we reduce R.

nagasakianum

to a synonym of

var.

nudipes.

12aii. var. tokushimense Yamazaki, J. Jap. Bot.

56:

364

(1981);

op. cit.

59:

210 (1984).

Type:

Japan, Shikoku,

Pref.

Awa, Miyahama Sasa-toge,

viii 1947,

C.Abe

(holo.TI,

n.v.).

Capsule cylindrical, 13-20 x 4-5mm.

Japan (Shikoku). Known only from the type.

12b.

subsp. niphophilum Yamazaki, J. Jap. Bot. 56: 363 (1981).Type: Japan, Oziya

Shi,

Oziya, 100m, 3 viii 1964, cult. Tokyo, 18 v 1974, T. & F.Yamazaki (holo. TI,

n.v.).

12bi. var. niphophilum. *

Leaves rhombic, widest at the middle.

Corolla

red-purple.

Capsule

8-10 x 4-5mm.

Japan (Honshu). 100-700m.

RHODODENDRON SUBGENUS TSUTSUSI 151

12bii. var. lagopus (Nakai) Yamazaki, J. Jap. Bot. 59: 210 (1984).

Syn.: R.

lagopusNakai,

Bot. Mag. (Tokyo)40:483

(1926);R.

wadanum

Makino var.

lagopus

(Nakai) Hara, Enum. Sperm. Jap. 1: 78

(1948);

reticulation

D.Don var.

lagopus

(Nakai) Hatusima,

Sci.

Rep. Yokosuka City

Mus.

15:22

(1969).

Syntypes: Japan,

Hondo, Mt Daisen, fl. & fr., A.Kimura (holo. TI, n.v.).

la: Togashi et al., Species Rhododendron Japan 90-93 (1982).

Leaves rhombic, 35-50 x 25-40mm, apex acute, upper and lower surfaces sparsely

pilose, more densely so on midrib towards

base;

petioles densely

lanate.

Calyx

c.2mm,

densely villose. Stamens 10.

Ovary

villose; style glabrous.

Capsule

10-13 x c.3mm,

curved.

Japan (SW Honshu, Shikoku). Rocky mountain slopes, c.400m.

12biii. var. kirishimense Yamazaki, J. Jap. Bot.

59:

209

(1984).

Type:

Japan, Kyushyu,

Pref.

Miyazaki, Kirishimayama, Sonoura, 1100m, 27 viii 1972,

T.Minamidami

(holo.

TI,

n.v.).

Young shoots pubescent. Leaves small,

1.5-4.5

1.2-3cm,

apex obtuse. Capsule

suberect, cylindrical.

Japan (Kyushyu). 1100m.

12biv. var. tsurugisanense Yamazaki, op. cit. 210 (1984). Type: Japan,

Pref.

Tokush-

ima, Mt Tsurugisan, 1800m, 9 viii 1976, Yamazaki 1128 (holo. TI, n.v.).

Young shoots and petioles densely lanate. Leaves sub-chartaceous, large, in fruit

sparsely pubescent below.

Japan (Shikoku). 1800m.

13.

R. weyrichii Maxim., Rhododendr.

As.

Orient.

26,

t.2

(1870).

Type:

in Archipelago

Gotto , Insula Sylvestri,1853,

Weyrich,

n.v.

Syn.: R.

shikokianum

Makino, Bot. Mag. (Tokyo) 6: 53 (1892). Type:

Japan, Tosa,

Sakawa

(iso.

K).

la: Togashi et al., Species Rhododendron Japan

98-101

(1982).

Shrub or small tree; young shoots soon becoming glabrous.

Leaves

broadly rhombic

3.5-8 x

1.5-6cm,

apex acute, upper surface at first with scattered brown pilose hairs,

soon glabrescent, lower surface with scattered brown

hairs,

mainly on

midrib;

petioles

5-7mm,

covered with brown pilose hairs, later glabrous.

Inflorescence

2-4-flowered,

flowers appearing before the leaves; pedicels 2-4mm, densely covered with brown

pilose hairs. Calyx minute, ciliate.

Corolla

open funnel-campanulate, 3O-4Omm, pink

with darker flecks, lobes c.20mm, oblong. Stamens 10, unequal, filaments glabrous.

Ovary

densely pilose; style glabrous or pubescent below, sometimes also papillate.

Capsule

10-20mm, curved, with adpressed villose hairs.

Japan (Kyushyu, Shikoku, SE Honshu), Korea. Map 26.

14.

R. sanctum Nakai, Bot. Mag. (Tokyo) 46: 630 (1932). Syntypes: Japan, Hondo,

Ise Prov., Ando (TI); Shimajiyama, Nakai, n.v.

152 EDINB.

BOT. 47(2)

Syn.:

weyrichii Maxim, var. sanctum (Nakai) Hatusima, Sci. Rep.

Yokosuka City Mus. 15:23(1969). |

Ic:

Togashi et al., Species Rhododendron Japan 102-105

(1982).

Tree,

to 5m; young shoots becoming glabrous.

Leaves

broadly rhombic, 3-8 x 2.5- If

6cm, apex acuminate, upper surface densely hairy at first, becoming glabrous, lower 3

surface with scattered hairs persisting along midrib; petioles 2-4mm, densely covered If

with red-brown pilose hairs.

Inflorescence

3-^4-flowered, flowers appearing before f§

leaves;

pedicels 5-10mm, densely

pilose.

Calyx

minute,

densely

pilose.

Corolla

funnel- -if

campanulate, 25-35mm, rose-pink, rarely white, with darker flecks, lobes 20mm, fj

oblong. Stamens 10, unequal, glabrous. Ovary densely pilose; style pilose in lower -%

half.

Capsule

c. 10mm, pilose. ||

Japan (Hondo). Mountain sides. Map

26.

The type seen differs from Nakai's description in having corollas 25-35mm long; j|

the concept used here is based on this type. p

15.

R. amagianum Makino, J. Jap. Bot. 7:21 (1930). Type: Japan, Prov. Idzu, Mt |j

Amagi, Makino, n.v. ij

Syn.: R.

weyrichii

Maxim, var.

amagianum

(Makino) Hatusima, Sci.

Rep.

Yokosuka City Mus.

15:

23 (1969).

Ic:

Togashi et al., Species Rhododendron Japan 106-109 (1982).

Tree,

to 5m; young shoots densely covered with white soft hairs, later glabrescent.

Leaves broadly ovate-rhombic, 4-9 x

3-9cm,

apex acuminate, upper surface with

long scattered brown hairs, lower surface with adpressed brown pubescent hairs,

especially on midrib; petioles 5-10mm, densely adpressed-brown-pubescent. Inflor-

escence

1-3-flowered;

pedicels 6-13mm, densely pubescent.

Corolla

open-campanu-

late,

25-40mm, reddish-orange, upper lobe with darker flecks, lobes 25mm, oblong.

Stamens 10, glabrous. Ovary densely brown-pubescent; style with white pubescent

hairs at base.

Capsule

ovoid, 15-20mm, densely pubescent.

Japan (Hondo, Idzu Peninsula). c.lOOm. Map 26.

Closely allied to R.

sanctum

and possibly conspecific; differing in its often longer

pedicels and in its red flowers. R.

amagianum

apparently flowers in mid July, about

one month later than R.

sanctum,

and has an extremely restricted range.

SPECIES INCOMPLETELY KNOWN

R. amakusaense (Yamazaki) Yamazaki, J. Jap. Bot. 62: 72 (1987).

Syn.: R.

viscistylum

Nakai var.

amakusaense

Yamazaki J. Jap. Bot.

59:208

(1984).

Type:

Japan, Kyushu, Amakusa

Islands,

Kami-

shima, Nokodake, 24 viii 1978, K.

Takeda

(holo.

TI, n.v.).

Leaves rhombic-ovate, at first long-pilose, becoming sparsely pubescent below.

Cap-

sule

arcuate-cylindrical, 7-11 x 2.5-3.5mm.

Japan (Amakusa Islands). Only two specimens known.

Probably allied to R.

viscistylum.

RHODODENDRON SUBGENUS TSUTSUSI 153

R. hyugaense (Yamazaki) Yamazaki,

Jap. Bot. 62: 72 (1987).

Syn.: R. viscistylum Nakai var. hyugaense Yamazaki,

Jap. Bot. 59:

208 (1984). Type: Japan, Kyushyu,

Pref.

Miyazaki, Koyu-gun,

Nishimera, Shiono, 500m, 11

1978, K.Takeda 89101 (holo.

TI,n.v.).

Leaves ovate to ovate-elliptic, apex acuminate, both surfaces long-pilose at first,

becoming glabrous.

Capsule

globose-cylindrical,,5-9 x 4-5mm.

Japan (Kyushyu).

c.500m.

Probably allied to R.

viscistylum.

R. osuzuyamense Yamazaki, J. Jap. Bot.

59:

208 (1984).

Syn.: R.

dilatatum

Miquel var.glaucum Hatusima,

Sci. Rep.

Yokosuka

City Mus. 15: 22 (1969). Syntypes: Prov. Hyuga, Mt Osuzu,

1100-1300m, Sako

3348,

n.v.;

Hatusima

Sako 31427, n.v.—

basionym; R.

viscistylum

Nakai

var.

glaucum

(Hatusima) Sugi-

moto,

New Keys Woody

PI.

Japan 509 (1972).

Japan (Kyushyu).

Probably allied to R.

viscistylum

or to R.

mayebarae

but, without access to either

a description or specimens we cannot confirm this.

R. yakumontanum (Yamazaki) Yamazaki, J. Jap. Bot. 62: 72 (1987).

Syn.: R.

nudipes

Nakai subsp.

yakumontanum

Yamazaki, J. Jap. Bot.

56: 364

(1981).

Type:

Japan, Yakushima,

Pref.

Obsumi, Naga-

ta-dake, 25 vii 1927,

Masamune

(holo. TI, n.v.).

Shoots slender, arcuate-ascendant. Leaves dilatate-ovate, brownish pilose on upper

surface towards base when in fruit. Flowering buds ovate-globose, densely yellowish-

brown-pubescent.

Japan (Yakushima).

Since we have no material available we are dependent on the type description, a

translation of which is provided above. From this description we are uncertain of the

true affinities of

this

species but can only assume that it is related to R.

nudipes.

IDENTIFICATION OF SPECIMENS

This list includes the identifications of all numbered herbarium specimens studied

during the preparation of this revision. In addition unconfirmed literature records are

included; the numbers that refer to these specimens are italicised. While care has been

taken to cite the names of

Chinese

collectors in a recognizable form, either in Pinyin,

or in an agreed and listed spelling, we cannot guarantee that they are all correct or

that some collectors are not duplicated with different spellings. Some of the more

commonly cited collectors are cross-referenced, both in Wade Giles and in Pinyin.

Abe: s.n.

nudipes var. takushimense;

35670

reticulatum

Agricultural

Exp;.

44 hejiangense

Alcasid:

1815 subsessile

154 EDINB. J. BOT. 47(2)

Amano:

6957 scabrum subsp. amanoi

Amoy Univ.: 20 farrerae

Anon.:

2 microphyton; 9 simsii var. simsii; 21, 23, 24, 26 microphyton; 30 simsii var.

simsii; 37 mariesii; 48 farrerae; 84 simsii var. simsii; 90 farrerae; 92a kwangtungense;

99 simsii var. simsii; 101 farrerae; 109 simsii var. simsii; 164 farrerae; 172 mic-

rophyton; 174 mariesii; 183 polyraphidoideum; 187, 235, 236, 237, 238, 239, 241,

242,

243, 244, 246, 247 simsii var. simsii; 306 polyraphidoideum; 377, 380, 433

simsii var. simsii; 434 rivulare; 469 simsii var. simsii; 584 polyraphidoideum; 601,

605,620 simsii var. simsii; 765 oldamii; 767 simsii var. simsii; 839,915,963 mariesii;

1005,

1084 simsii var. simsii; 1095 meridionale var. meridionale; 1215 florulentum;

1275,

1443 simsii var. simsii; 1525 mariesii; 2007,2021, 2050 simsii var. simsii; 2057

yedoense var. poukhanense; 2072,

2073,

2098 simsii var. simsii; 2477 kwang-

tungense; 2750 mariesii; 2758 simsii var. simsii; 2839 simsii var. mesembrinum;

3574,

3593 mariae subsp. mariae; 3845, 3989 simsii var. simsii; 5116 microphyton;

5116,

5144 simsii var. simsii; 5532 farrerae; 5885 simsii var. simsii; 7724 mariesii;

8254 microphyton; 10626, 13175 simsii var. simsii;

20201,

20592 mariesii; 23068

minutiflorum; 23136 simsii var simsii; 25077 minutiflorum; 25529 simsii var. simsii;

25552,

25893 mariesii; 26406 simsii var. simsii; 27105, 27935, 28028 mariesii; 28142

simsii var. simsii; 28935 mariesii; 29625, 30283 simsii var. simsii; 31711 kwang-

tungense; 34158 mariesii; 40400 mariae subsp. mariae; 42734 naamkwanense var.

naamkwanense; 103733 mariesii; 74-4531 kwangtungense

Anshun Exp.: 891 rufohirtum

Bai,J.L.

& Ling, R.: 4087 farrerae; 4135 mariesii

Bao,

S.Y.: 38, 207 simsii var. simsii

Barnes: 922 subsessile

Bartlett: 13249 subsessile

Beijing Inst. Bot.: 1140625 microphyton

Bijie Exp.: 1699 rivulare; 5089 seniavinii

Bisset: 235 mucronatum; 237 sanctum; 1121 kaempferi; 1300 serpyllifolium; 2109

macrosepalum; 2112 wadanum; 2113 serpyllifolium; 3685 dilatatum; 3728 indicum;

3936 nudipes var. nudipes; 4018 tsusiophyllum

Bisset, J.: 1121b weyrichii

Bock von Rosthorn: 2148 simsii var. simsii

Bodinier: 1096 simsii var. simsii; 1099 farrerae •

Boehinco: 3780 wadanum-

Bon:

264, 439 simsii var. simsii

Bor: 36 mucronatum

Boufford & Hsien, C.F.: 3828 rubropilosum

Boufford&

Wood:

18957 macrosepalum; 18960 kaempferi

Brooks: 516 kaempferi

Cadiere: 1 simsii var. simsii (annamense)

Cai, Cong Xing: 5134, 5401 polyraphidoideum var.montanum

Canton Agric. Coll.: 531a simsii var. simsii; 531b mariae subsp. mariae

Canton Christian Coll.: 12391 chunii

Carles: 128 simsii var. simsii

Cavalerie: 10 mariesii; 1559 rivulare; 1796,2059 chrysocalyx; 3221 fuchsiifolium; 3892,

4490 simsii var. simsii; 8121 microphyton

RHODODENDRON SUBGENUS TSUTSUSI 155

Celestino:

4328 subsessile

Ceng, Cang Jiang {Tseng,

C.J.)

Ceng, H.D.: 16703 farrerae; 20019 simsii var.simsii; 20332 tsoi; 20392 naamkwanense

var. naamkwanense; 20507 farrerae; 20680 kwangtungense; 20778 rivulare; 20999

kwangtungense; 21212 florulentum; 21214 farrerae; 21269 simsii var. simsii; 21412

farrerae; 21468 mariesii; 21566 florulentum; 21949,21951 meridionale

var. mer-

idionale; 21952 hainanense; 21974 meridionale var. meridionale; 21983 hainanense;

22010, 22110, 22186 meridionale

var.

meridionale; 22229, 22528 mariae subsp.

mariae; 23491 simsii

var.

simsii; 23545 mariesii; 23669, 23677 simsii

var.

simsii;

23710 mariesii; 24023 mariae subsp. mariae; 24180, 24470 meridionale

var. mer-

idionale; 24570 hainanense; 24696 mariae subsp. mariae; 24777 hainanense; 24778

meridionale

aff.;

25020,25048,25060 simsii var. simsii; 25061,25087 farrerae; 25155

simsii

var.

simsii; 25203, 25221 mariae subsp. mariae; 25335 naamkwanense

var.

naamkwanense; 25379, 25487, 25586 tsoi; 25588, 25645 farrerae; 25669 simsii

var.

simsii; 25778 farrerae; 26252, 26318, 26360 simsii

var.

simsii; 27059 saxicolum;

27674,27847 simsii var. simsii; 28295 mariae subsp. mariae; 28329 simsii var. simsii;

28410 rivulare; 28489 minutiflorum; 28755 mariae subsp. mariae; 28947 simsii

var.

simsii

Challenger Exp.: 189kaempferi

Champion: 123 simsii var. simsii

Chang,

A.L.:

79-2093 microphyton

Chang,

C.C.

{Zhang,

Z.S.)

Chang,

C.Z.:

3584, 4420 simsii var. simsii

Chang,

H.C.:

1849 rufulum

Chang, H.F.: 292 simsii var. simsii

Chang,

H.J.:

3790 mariesii; 14147 nakaharai

Chang, K.C.:

naamkwanense var. naamkwanense; 376, 1071 mariesii

Chang,

S.Y.:

2127, 3024 pulchrum

Chang,

S.Z.:

5198 simsii var. simsii

Chang, Y.P.: 277 simsii var. simsii; 735 microphyton

Chang,

Y.P. &

Tsang,

T.S.:

4856 seniavinii

Chang,

Z.R.:

4870, 5462, 5599 simsii var. simsii

Chang,

Z.S:.

400330, 401187, 401262, 401492, 401496 mariesii

Chang,

Z.Y.:

18314, 25632 mariesii

Chao,

Ching Sheng: 5027, 5163,

5693,

5915, 5947, 116670 microphyton

Chao,

T.M.

& Kao,

M.T.:

6182 rubropilosum

Chen:

696, 3089, 3587 microphyton

Chen,

En: 2454, 2586 simsii var. simsii

Chen,

Bing Ying: 53680 microphyton

Chen,

2309 simsii var. simsii

Chen,

D.R.:

7306 mariae subsp. mariae; 7307, 7315 simsii var.simsii; 7339 tsoi

Chen,

G. Y.:

2375, 2487 mariesii

Chen,

Heng Chun: 500047 rivulare

Chen,

H.C. et at.

500044 mariesii

Chen,

Huan Yong {Chun, W.

Y.)

Chen,

Jie

{Chen,

C.)

Chen,

K.Y.:

1401 simsii var. simsii

156 EDINB. J. BOT. 47(2)

Chen,

Li Qing: 93228 simsii var. simsii;

94461,

94729,94734 rivulare; 832287,900004,

900006 simsii var. simsii

Chen,

Li Qing & Xu, Y.B.: 10203 rivulare

Chen,

Liu Sin: 256 microphyton

Chen,

M.: 631, 765 mariesii; 3589 mariae subsp. mariae

Chen,

N.Q. & Tso, C.L.: 43666, 44285 hainanense

Chen,

Nian Qu: 40258, 40439, 40874 simsii var. simsii; 40884 farrerae; 40910, 41329

mariae subsp. mariae; 41991 kwangtungense; 42111a mariesii; 42111b farrerae;

42160 simsii var. simsii; 42167 farrerae; 42179 kwangtungense; 42600 farrerae;

42749 simsii var. simsii; 43020 minutiflorum

Chen,

Q.L.: 191 simsii var. simsii

Chen,

Qi: 10528 simsii var. simsii

Chen,

R.A. & Zhang, B.M.: 60692 mariae subsp. mariae

Chen,

R.F.: 30409, 30457 mariae subsp. mariae

Chen,

S.: 13 simsii var. simsii; 48, 983,1125,1197,1663, 2480, 2756, 2758,2837,2849,

2955,

3045, 3417, 3555, 3721 mariesii

Chen,

S.Q.: 226 mariesii; 1600, 1643, 2514 kwangtungense; 2591, 2714 hunanense;

2736 simsii var. simsii; 2937 hunanense; 2940 mariesii; 2996, 3356 simsii var. simsii;

3845,

3907, 4544 meridionale var. meridionale; 4548 hainanense; 4664 lon-

gifalcatum; 4807 hainanense; 4809,4811 meridionale var. meridionale; 5544 mariae

subsp. mariae; 7234 simsii var. simsii; 7743 hainanense aff.; 8753 simsii var. simsii;

8785 meridionale var. meridionale; 8805 mariae subsp. kwangsiense; 8837 rivulare;

9584,

9589 simsii var. simsii; 9721,9821 mariae subsp. mariae; 10689 minutiflorum;

12206, 12212, 14144 rivulare; 14208, 14302, 14331 mariae subsp. mariae; 14356

rivulare; 14523 mariae subsp. mariae; 14689 minutiflorum; 14914 mariae subsp.

mariae; 15487 rivulare; 15542 simsii var. simsii; 16052 rivulare; 16148 mariesii;

16246, 16323 mariae subsp. mariae; 16450, 16456, 16570 rivulare; 16939 mariae

subsp. mariae; 17077 rivulare; 17095 mariae subsp. mariae; 17175 rivulare; 17188

mariae subsp. mariae; 18255 farrerae; 18256 simsii var. simsii; 18260 mariae subsp.

mariae; 18485a tenuilaminare; 18486 naamkwanense var. naamkwanense; 18489

bicorniculatum; 18490 naamkwanense var. cryptonerve; 18492 simsii var. simsii;

18493 mariae subsp. mariae

Chen,

Shao Jin: 131 mariesii

Chen,

T.C.: 74 rivulare; 75 mariae subsp. mariae; 305, 316 rivulare; 367 mariae subsp.

mariae; 369 minutiflorum; 686 rivulare; 3508 kwangtungense

Chen,

W.: 94 mariesii

Chen,

W. & Huang, J.: 81101 simsii var. simsii

Chen,

W.C.: 10808 simsii var. simsii

Chen,

X.C.: 1177 simsii var. simsii; 1305 farrerae; 1409 simsii var. simsii; 1531,1874,

1929 farrerae; 3273, 3471 simsii var.simsii

Chen,

Z.: 86 simsii var. simsii

Chen,

Z.Z.: 46 mariesii; 50298 minutiflorum; 50300 unciferum; 50325 simsii var.

simsii; 50815, 50817 mariae subsp. mariae; 50867 rivulare; 51036 minutiflorum;

51051 mariae subsp. mariae; 51122, 51125 minutiflorum; 51180 mariae subsp.

mariae; 51216, 51407, 51889 mariesii; 52211 subenerve; 52367 minutiflorum; 52530

seniavinii; 52887 simsii var. simsii; 53212 mariae subsp. mariae; 53702 minuti-

florum

RHODODENDRON SUBGENUS TSUTSUSI 157

Cheng: 2729, 2926, 3015, 3222, 3726 simsii var. simsii; 1975-94 mariesii

Cheng, M.: 1161, 1396 mariesii

Cheng, Sang Yong:

10191,

10374 microphyton

Cheng, Wan Chun: 2280 mariesii

Cheng, W.C. & Hwa: 377 mariesii; 453, 879 simsii var. simsii; 897, 1027 mariesii

Cheng, W.C. et al: 4028, 4820 mariesii

Cheng, Y.Q.: 170104 mariesii; 170139 kwangtungense

Cheo & Wilson: 12741 mariesii

Chi,T.C: 3205 rivulare; 3338 seniavinii; 335 rivulare

Chiao,

Y.: 14446 simsii var. simsii

Chiao,

Z.S.: 16 rufulum; 205, 268 rivulare; 921 rufulum

Chien:

5893 simsii var. mesembrinum

Chien,

C.Y.: 2092 farrerae; 7956, 14530 simsii var. simsii

Chien,

Sung Shu: 403, 820, 926 mariesii; 5893 simsii var. simsii

Chien,

T.C.: 7277rubropilosum

Ching & Zo, J.L.: 365 mariesii

Ching, R.C.: 109 mariesii; 1271 simsii var. simsii; 1342, 2124 mariesii; 2236 seniavinii;

2641 simsii var. simsii; 2815 mariesii; 2902 simsii var. simsii;

2903,

3063 mariesii;

3111 simsii var. simsii; 5815 rivulare; 5860 minutiflorum; 5893 rivulare; 5937,

6041 mariae subsp. kwangsiense; 6088 mariesii; 6142 meridionale var. minor; 6321

chrysocalyx; 7179 mariae subsp. mariae; 8063 meridionale var. meridionale; 8066

hainanense; 8088 meridionale var. meridionale; 11145,11147 mariesii; 22679 simsii

var. simsii

Chingshan Exp.: 427 mariae subsp. mariae

Chou, P.C.: 80128 meridionale var. meridionale; 80207 mariae subsp. kwangsiense;

Chou, T. Y.: 531, 532, 668 mucronatum

Chow, H.C.: 7 simsii?; 108, 322 mariesii; 370 simsii var. simsii; 622 mariesii; 1791,

9090,

9137, 9217, 9666 simsii var. simsii

Chow, H.P.: 2082, 2541 mariesii

Chow, K.S.: 1973-109, 1975-094 mariesii

Chu, K.L.: 898 simsii var. simsii; 1955, 2083 mariesii

Chu, SuiFa: 4729, 20251 microphyton

Chu, T.S.: 355 farrerae

Chuang, C.C. & Kao, M.T.: 233 lasiostylum; 4443 taiwanalpinum;

Chun,

N.K. {Chen, N.Q.)

Chun,

S.S.: 12394 simsii var. simsii

Chun,

W.P.: 3968 mariesii

Chun,

Woon Young: 3671, 3673 mariesii; 3674 simsii var.simsii; 3676 mariesii; 3740,

5437 simsii var. simsii; 5442 farrerae; 5564, 5668, 5843 simsii var. simsii; 5888

kwangtungense; 5917 mariae subsp. mariae; 6203 simsii var. simsii; 6503 mariae

subsp.

mariae; 6525 simsii var. simsii; 7993 kwangtungense; 8226 simsii var. simsii;

12012 mariae subsp. mariae

Chung, D.Z.: 80064, 80067 kwangtungense

Chung, H.H. (Zhong, X.X.)

Chung, I.C.: 987 yedoense var. poukhanense

Chung, P.C. {Zhong, P.Q.)

Chung, Z.S.: 10713 simsii var. simsii; 10829 farrerae; 80902, 81551 simsii var. simsii;

158 EDINB. J. BOT. 47(2)

81560 seniavinii; 81621 mariesii; 81821 rivulare; 81963 seniavinii; 82036, 83441

mariesii; 83520,84522 simsii var. simsii; 85044 rivulare; 90957 mariae subsp. mariae;

808053,808582 simsii var. simsii; 808594,808624 mariesiil 808835,808838 rivulare;

808880,

808884, 808889, 808930 simsii var. simsii

Creech:

156 taiwanalpinum; 465,1473 rubropilosum; 1496 oldhamii; 1533 kanehirai;

1541 rubropilosum; 1571 oldhamii; 1596 lasiostylum

Dai, TianLong: 1834 mariesii; 1837 simsii var. simsii;

100001;

102855,103986 mariesii;

104456,

104674 simsii var. simsii; 105783 mariesii; 106226 simsii var. simsii

Dalziel: s.n. farrerae

Davis et ah: 7254 yedoense var. poukhanense

Dayaoshan Exp.: 10883 mariae subsp. kwangsiense; 10957 kwangtungense; 11459,

11482 mariae subsp. kwangsiense; 11556,11631 kwangtungense; 11925 meridionale

var. meridionale; 12169 minutiflorum; 12226 kwangtungense; 12440 mariesii; 12447,

12972,

13379 kwangtungense; 13387, 14137 mariae subsp. kwangsiense;

14211,

14425,

14434 kwangtungense

Delavay: 303 atrovirens; 1122 simsii var. simsii

Deng, Ce Long: 13284, 13327 simsii var. simsii

Deng, M.B.: 3922, 4796 mariesii

Deng, S.W.: 900115 mariesii; 90324 chrysocalyx

Deng, Sian Fu: 125 simsii var. simsii

Ding, B.Y.: 4082 saxatile

Ding, G.Q.: 6015 mariae subsp. kwangsiense

Ding, G.Q. & Shi, G.L.: 210 mariae subsp. mariae; 227 mariesii; 260 tsoi; 586

mariesii

Doleshy & Doleshy: 831 sanctum

Dorsett & Morse: 520 kaempferi

Du,

Da Hua: 84, 3190 simsii var. simsii

Ducloux: 16 simsii var. simsii; 91, 102, 105, 110 microphytom; 1269 simsii var.

simsii

Dunn:

2882 mariesii; 5886 farrerae

Dunn,

ST.: 2881 simsii var. simsii

E China Exp.: 6642 simsii var. simsii

Eberhardt: 2060, 2799 simsii var. simsii (annamense)

Ecology Team: s.n. atrovirens

Elmer: 5799, 8595, 14298 subsessile

Endo:

111 hyugaense

Enomoto: 1\61 x tectum; 7168 sanctum; 7170 sanctum f. albiflorum; 8679 tosaense;

8691 kiusianum var. sataense 10957 mucronatum var. ripense

Esquirol: 3560 chrysocalyx

Fan,

C.S. & Li, Y.Y.: 13 simsii var. simsii; 182 mariesii

Fang, F: 23939, 24511 mariesii

Fang, Ming Yuan: 23929 mariesii; 24002 simsii var. simsii; 24511 mariesii; 24826 simsii

var. simsii;

Fang, W.Z.: 25 mariesii

Fang, Wen Pei: 45 mariesii; 825, 1032, 6413 simsii var. simsii; 9996, 9997, 10083

mariesii; 12157,12395, 13209, 13630, 14206,14281,15687, 16299, 18098 simsii var.

simsii

RHODODENDRON SUBGENUS TSUTSUSI 159

Forges: 50,846 farrerae; 838 simsii var. simsii; s.n. mariesii

Farrer. 800 simsii var. simsii; 806 microphyton; 808 simsii var. simsii; 917 simsii var.

mesembrinum

Faurie: 165 rubropilosum; 636 tschonoskii var. tschonoskii; 661 kaempferi; 664, 666,

670 yedoense var. poukhanense; 800, 875, 879 tschonoskii var. tschonoskii; 1448

nudipes var. lagopus; 1449 mucronatum; 1450 tschonoskii var. tschonoskii; 1863,

1864 weyrichii; 1872 rubropilosum; 1874 tschonoskii var. tschonoskii; 2128

kaempferi; 2133, 2300 mucronatum; 4444 tschonoskii var. tschonoskii; 5435 sca-

brum subsp. scabrum; 5831 tschonoskii var. tschonoskii; 6786 mucronatum var.

ripense; 7820 macrosepalum; 13386 tschonoskii var. tschonoskii

Fedorov et ah: 131, 684 microphyton

Fei, L.S. & Wang, A.J.: 615 farrerae

Fei, L.S. & Wu, D.C.: 743, 744, 745 mariae subsp. mariae

Feng, C.F. & Kao, M.T.: 4866 rubropilosum

Feng, G.M.: 218 simsii var. simsii; 4892 flumineum; 6875,10167,10263,10274,10297,

10402 microphyton; 10693 simsii var. simsii; 10929 flumineum; 12073 micro-

phyton; 12664 simsii var. simsii; 12949,

13221,

13496 microphyton; 13684, 13810,

13811 flumineum; 22048 simsii var. simsii; 24199 flumineum; 73-473 simsii var.

simsii

Forbes: 2039 farrerae

Forrest: 2282 simsii var. simsii; 4172 microphyton; 4173 simsii var, simsii; 6768, 7504,

7505 microphyton; 7832 simsii var. mesembrinum; 7891, 9476, 9927 microphyton;

11824 simsii var. simsii; 11948 simsii var. mesembrinum; 12084, 12085, 12369

microphyton; 17914 simsii var. mesembrinum; 17918,

18731,

21087 21088, 21089

microphyton; 21124 simsii var. simsii; 24037 simsii var. mesembrinum; 24038,24053

simsii var. simsii; 24080 simsii var. mesembrinum; 24083,24088 microphyton; 24105

simsii var. mesembrinum; 24133 microphyton; 24157 simsii var. mesembrinum;

24639 microphyton; 55478,25491 simsii var. simsii; 25492 simsii var. mesembrinum;

25638,

25813 microphyton; 26024 simsii var. simsii; 26025 microphyton; 26027,

26282,

26450 simsii var. simsii; 26460 microphyton; 26479, 27371 simsii var. simsii;

27428,

27433 microphyton; 28322 simsii var. simsii; 28345, 29117, 29446, 29447

microphyton; 29481 simsii var. simsii; 29484 microphyton; 29526 simsii var. simsii;

29535,

29541 simsii var. mesembrinum; 29630 simsii var. simsii

Fortune: 122 farrerae; 152, 153, A72 simsii var. simsii

Fu,

C.C.: 2448 simsii var. simsii

Fu,

J.X.: 1390, 1562 simsii var. simsii

Fu,

K.I.: 555 hainanense

Fu,

K.J.: 4920 mariesii; 11653 simsii var. simsii

Fudan Minhou Exp.: 40077, 58164, 60584, 64136 simsii var. simsii

Fudan Univ.: 57729, 58259, 91817 mariesii

Fudan W Min Team: 84150 simsii var. simsii

Fujian Agric. Coll.: 400977 simsii var. simsii

Fujian Forestry Coll.: 86 florulentum

Fujian Med. Res. Inst.: 12,17, 761, 771, 781 seniavinii

Fujian Normal Coll.: 400395 simsii var. simsii; 400438 mariesii; 400546, 400564 simsii

var. simsii; 400598, 400787, 400818, 400996 mariesii; s.n. farrerae

Fujisan Med. Res. Inst.: 3974 wadanum

160 EDINB. J. BOT. 47(2)

Fukuoka: 6784 tschonoskii var. tschonoskii; 7252 wadaniun; 7600 yedoense var. yedo-

ense

Fukuoka & Konta: 201 tschonoskii var. trinerve

Fukuoka et ah: 1034 macrosepalum

Furuse: 2282 simsii var. simsii; 6136 kaempferi; s.n. nudipes aff.

Goo,

Xi Pong: 50132, 50205, 50206, 50219, 50220, 50221 simsii var. simsii; 50357,

50398 chunii; 50404 mariesii; 50405 mariesii; 50411 chunii; 50433 simsii var. simsii;

50435 kwangtungense; 50522 simsii var. simsii; 50883, 50996 mariae subsp. mariae;

51120 mariesii; 51190, 51224 mariae subsp. kwangsiense; 51865 kwangtungense;

52276 hainanense; 52433 simsii var. simsii; 52536 kwangtungense; 52581 farrerae;

52597 simsii var. simsii; 52804 rhuyuenense; 52830 simsii var. simsii; 52924, 53312

farrerae; 53548 simsii var. simsii; 53773 naamkwanense var. naamkwanense; 53776,

54096 simsii var. simsii; 54098 farrerae; 54106 cretaceum; 54135 naamkwanense

var. naamkwanense; 54218 hunanense; 54267 kwangtungense; 54312 subflu-

mineum; 54622 rhuyuenense; 56082 simsii var. simsii

Garrett: 837 saxicolum?

Gen,

B.G.: 246 mariesii

Gilchrist: 38 farrerae; 66 mariesii

Ging, T.S.: 7491 simsii var. simsii

Gong, Xian Shui: 3618, 3623 microphyton

Gong, Wan Yu: 306 simsii var. simsii

Gongcheng Exp.: 197 rivulare

Goodspeed: 32-2352 simsii var. simsii

Greatex: H230/51 kiusianum var. kiusianum; H2320/51a nudipes var. nudipes;

H2320/51b wadanum

Gressitt: 121 lasiostylum; 347 oldhamii; 1286 apricum?

Guan, D.: 1466 simsii var. simsii

Guan, G.J.: 136, 140, 300 mariesii

Guan, G.J. & Dai, T.L.: 47, 800, 1149, 2047 simsii var. simsii; 2191 mariesii

Guan, X.J.: 308, 2057, 2105 simsii var. simsii

Guan, Zong Tian: 6067, 6072, 7334 9244 microphyton

Guangxi Exp.: 27 simsii var. simsii; 40 rivulare; 159 rivulare; 436 mariae subsp.

kwangsiense; 583, 609 mariae subsp. mariae; 623 mariae subsp. kwangsiense; 651

mariesii; 677 fuchsiifolium; 690 mariesii; 3522, 3545, 3560 mariae subsp. .mariae;

3815 rivulare

Guizhou Exp.: 607 seniavinii; 867 mariae subsp. mariae; 74-445, 74-847, 74-957

rivulare

Guo,

P.Z.: 1810, 4300 mariesii

Guo,

Su Bar. 80112 simsii var. simsii; 80403 kwangtungense

Hainan Exp.: 414 hainanense

Hance: 6706 farrerae

Hancock: 32 simsii var. simsii; 96 subsessile; 155 simsii var. simsii

Handel-Mazzetti: 241 mariae subsp. mariae; 289 mariesii; 480 simsii var. simsii; 493

rufohirtum; 1104, 6094, 6108 microphyton; 6184 simsii var. simsii; 10696 rivulare;

11569 simsii var. simsii; 13084 microphyton

Hasegawa: 1419 tschonoskii var. tschonoskii

Hashimoto: 1622 macrosepalum

RHODODENDRON SUBGENUS TSUTSUSI 161

Hatsusima: 13851 serpyllifolium; 14197 tschonoskii var. tschonoskii; 16475 nudipes

var. nudipes

Hatusima: 29548, 29582 reticulatum f. viscosum

Hatusima & Sako: 30322 hyugaense; 31427 osuzuyamense

Hayasi: 329 mariesii; 334 lasiostylum

Hayata & Mori: 7044 rubropilosum

He, G.S.: 1473 farrerae

He, H.D.: 60182 simsii var. simsii

He, H.J.: 130016 simsii var. simsii

He, J.\ 2256 farrerae; 2607 simsii var. simsii

He, T.: 1955 simsii var. simsii; 1982 mariesii; 2052 simsii var. simsii; 2256 mariesii

He, Xian Su: 2392 mariesii

He, Xiang You: 20906, 22749 simsii var; simsii; 23456 mariesii

Henan Exp.: 8026 simsii var. simsii

Henry: 588 oldhamii; 782,1160 simsii var.simsii; 1422 mariesii; 3194 simsii var. simsii;

3829,

5274, 5947 mariesii; 9900,11596 simsii var. simsii; 12983,14596 microphyton

Hers: 1153, 1284 simsii var. simsii; 2305 mariesii; H248 simsii var. simsii

Hi, Chan Xue: 75121 oldhamii

Hongkong Herb.: 229 mariesii;

8263,

11676, 17323 farrerae

Ho:

60630 simsii var. simsii

Ho,

S.M.: 166 simsii var. simsii

Ho,

S.Y.: 5122 farrerae; 5125, 9992, 13061 simsii var. simsii

Ho,

Y.Y.: 20933, 22339, 24320, 25966,

28441,

29938, 30263, 30473, 30793, 31113,

36081 mariesii

Hopu PI. Exp.: 2320 meridionale var. meridionale; 2463 gratiosum; 2511 myr-

sinifolium

Horie: 101984 serpyllifolium

Hosie: 30 simsii var. simsii

Hosoi: 2157 tschonoskii var. tschonoskii; 2158 kaempferi

Hotter. 14872 kaempferi

Hou, Quan Zhao (How, F.C.)

How, Fook Chew: 72612, 72620, 73720 hainanense;74226 mariae subsp. mariae

Hsia, D.Y.: BG6 simsii var. simsii

Hsieh,

C.S.: 1292 taiwanalpinum

Hsu, C.C.: 8900 rubropilosum; 10230 simsii var. simsii; 10594,12411 lasiostylum

Hsu, C.C. et

ah:

8872 rubropilosum; 10571 simsii var. simsii; 11366 lasiostylum; 12460

sikayotaizanense; 13823 rubropilosum; 13942 taiwanalpinum; 13956 lasiostylum;

14129,14146 taiwanalpinum; 14153 noriakianum; 14218 mariesii

Hu: 9186 simsii var. simsii

Hu, Chi Ming: 2141 mariesii; 2559 simsii var. simsii; 2564, 2769 mariesii; 3068, 3289,

3341 simsii var. simsii; 3635 mariesii; 3735, 4290 simsii var. simsii; 4878 mariesii;

4939,

5377, 5615 simsii var. simsii; 12118 naamkwanense var. naamkwanense

Hu, CM. & Li, Q.H.: 1394 simsii var. simsii

Hu, CM. & Ling: 2086 simsii var. simsii

Hu, Hsen Hsu: 179 mariesii; 2645 simsii var. simsii

Hu,S.Y.:

10204 farrerae

Hu, W.K.: 12125 simsii var. simsii

162

EDINB.

BOT.

47(2)

Hu, Xian Su (Hu, H.H.)

Huang & Kao: 1746 rubropilosum

Huang, C: 820375 hainanense

Huang, Cheng: 102735, 161410 mariae subsp. mariae; 162732 farrerae; 162735 mariae

subsp. mariae; 164277 kwangtungense; 164368 hainanense aff.

Huang, D.A.: 60067, 60125 mariae subsp. kwangsiense; 60131 rivulare

Huang, De Zhen: 247 pinetorum; 248 simsii var. simsii; 255 rivulare; 822 simsii var.

simsii

Huang, J.H.: 130544 simsii var. simsii

Huang, Mao Xian: 110040 hainanense/meridionale; 111420 polyraphidoideum var.

montanum; 111916, 111993 rhuyuenense; 112004 farrerae; 112057 poly-

raphidoideum var. montanum; 112740; 374333 mariesii

Huang, Q.: 291 flumineum; 663 simsii var. simsii

Huang, R.K.: 506, 512 mariae subsp. mariae

Huang, S.C.: 3674 minutiflorum

Huang, S.T.: 1141 simsii var. simsii; 3684 seniavinii

Huang, Shu Met 190784 farrerae

Huang, T.C.: 3362 nakaharai; 4091 rubropilosum; 4659 taiwanalpinum; 4678, 4682

rubropilosum; 5490 mariesii; 6083 oldhamii; 7081 sikayotizanense; 7174 tai-

wanalpinum; 7258 sikayotaisanense; 7675 oldhamii; 7748, 7770, 8600 sikay-

otaisanense

Huang, Y.: 125 rivulare

Huang, Y.Z.: 129 simsii var. simsii

Huang, You Ru: 2016, 2040, 2158, 2179, 2323 mariesii

Huang, Zhi & Teng, L.: 541 mariae subsp. mariae

Huang, Zhi: 30457 mariae subsp. mariae; 30458 simsii var. simsii; 30649,32049 mariae

subsp. mariae; 32093 simsii var. simsii; 35177, 35185 hainanense; 38130, 38547

simsii var. simsii; 38590 subcerinum; 39057 rivulare; 39135, 39297 mariesii; 39459

mariae subsp. kwangsiense; 39467 minutiflorum; 39614 yaoshanicum; 40007 rivu-

lare;

40260 minutiflorum; 40546 rivulare; 40706, 42456 simsii var. simsii; 43623 .

mariae subsp. mariae; 44281 simsii var. simsii; 44287, 44368 rhuyuenense

Hui: 12065 seniavinii

Hunan Forestry Coll.: 77-0389 mariesii

I.S.A.Y.:

178 naamkwanense var. cryptonerve

Idzumi

Togashi: 377 amagianum; 383 kiusianum var. kiusianum; 399 tsusiophyllum;

441 serpyllifolium

Ikegamt 5096 tschonoskii var. trinerve; 5103, 23599 nudipes var. nudipes

Inst. Chinese

Trad.

Med.: 7300059 kwangtungense

Jacobs: 7021, 7194 subsessile

Jian,

Z.P. (Tsien, C.P.)

Jiang, R.B.: 81-0016 chrysocalyx; 82-0003, 82-0042 seniavinii

Jiang, S.H.: 2362 mariesii

Jiang, Xiao Yao: 926, 1885, 2091, 3720 simsii var. simsii

Jiang Ying {Tsiang, Y.)

Jiang, Y.Z.: 740703 rufulum; 740737 simsii var. simsii

Jiang, Z.P.: 400806, 501218 farrerae

Jiang, Z.Y.: 2874 farrerae

RHODODENDRON SUBGENUS TSUTSUSI

163

Jiangxi Exp.: 2989 mariesii

Jiangxi Normal Coll.: 1119 mariesii; 1203 farrerae

Jin,

D.H.: 9814 mariae subsp. mariae

Jinyuan Med. Inst.: 129 simsii var. simsii

Judd,

W.N.: 78-476 oldhamii

Kadota: 1003 nudipes var. niphophilum; 1919 macrosepalum

Kanai: 371 nudipes var. niphophilum; 3852, 6425, 8674 wadanum; 9413 dilatatum

Kanai et

al.:

6358 kaempferi; 9664 macrosepalum

Kao,

M.T.: 3393 rubropilosum; 5262 taiwanalpinum; 6700 rubropilosum; 7964

oldhamii; 8604 noriakianum

Kato:

2982 tschonoskii var. tschonoskii; 5408 serpyllifolium

Kawada: 102313 reticulatum

Kawakami & Mori: 1160 mariesii; 7557,1859 rubropilosum

Keng, Yi Li: 60 simsii var. simsii; 531 mariesii; 630 simsii var. simsii; 2372, 2650

mariesii

Kermode: 1792 microphyton; 16602 simsii var. mesembrinum; 17191 microphyton;

17245 simsii var. mesembrinum

Kerr: 8837 simsii var. mesembrinum; 20091 simsii var. simsii

Kingdon-Ward: 1541 microphyton; 1792, 3007 simsii var. simsii; 3664 microphyton;

3684,

5502, 5508, 5568, 6607, 22036 simsii var. simsii

Kitamura & Murata: 1958 nudipes var. niphophilum; 3011 macrosepalum

S.P.Ko (Gao, X.P.)

Koyama: 921 macrosepalum; 1845 reticulatum

Koyama & Murata: 439 weyrichii

Kuenberg: s.n. nudipes var. lagopus

Kung, S.S. (Gong, X.S.)

Kunming Botanical Inst.: 101921 microphyton

Kuo,

C.C.: 912 breviperulatum; 1905 mariesii

Kuoh,

C.S.: 2339 nakaharai; 3712 oldhamii; 3822 rubropilosum; 4262,4333 oldhamii

Kuoh,

C.S. et al.: 6980 rubropilosum

Kurata: 574 hyugaense; 999,1000 osuzuyamense

Kurokawa & Togashi: 132 wadanum

Kwangfu Exp.: 85 rivulare; 96 simsii var. simsii; 101, 103 rivulare; 147 farrerae; 148

simsii var. simsii; 166 rivulare; 204 farrerae; 230 minutiflorum; 264 simsii var. simsii;

265,

353 mariae subsp. kwangsiense; 536 pulchroides; 1099 rivulare

Kwangtung Exp.: 71-0209, 71-0715 simsii var. simsii; 73-0001 rhuyuenense; 73-0048,

73-0744 simsii var. simsii; 73-0746 rhuyuenense; 73-0748, 73-0755 chunii; 73-1123

rhuyuenense; 74-5241 mariesii

La Touche: 10, 15, 17, 41, 53 simsii var. simsii; 129 tsoi aff.; 131 seniavinii; 202, 204

simsii var. simsii

Lai, M.J.: 13283 lasiostylum

Lai, S.K.: 3519 simsii var. simsii

Lai, S.S.: 43 mariesii; 120 simsii var. simsii; 279 polyraphidoideum; 605 simsii var.

simsii; 969 mariesii; 1409, 1489, 1787, 1988 simsii var. simsii; 2138 mariesii; 2165,

2479 simsii var. simsii; 2481 mariesii; 3965 polyraphidoideum; 3970, 4187 simsii

var. simsii; 4208,4815 polyraphidoideum; 5361 seniavinii var. crassifolium; 660055,

660512 polyraphidoideum

164 EDINB.

BOT. 47(2)

Lai,

S.S. et

al.: 5950 mariesii

Lai,

T.S.:

5397 mariesii

Lakshnakara: 1389 simsii var. simsii

Lao,

Guo: 312 mariesii

Lau & Lie: 12 mariesii

Lau, L.H. (Liu, L.H.)

Lau, S.K.: 885, 2006 mariae subsp. mariae; 4500 mariesii; 4671 simsii var. simsii;

23916,

24667

mariae subsp. mariae; 25010 simsii var. simsii;

27961,

27995, 28383

hainanense; 28533 mariae subsp. kwangsiense; 27955 hainanense

Law, Y.C. (Liu, Y.G.)

Law,

Y.P.:

488 simsii var. simsii

Leano:

25125 subsessile

Lee, C.T. (Li, Z.T.)

Lee, W.C.

& Kao,

M.T.:

K3940

oldhamii

Lei, S.S. (Lai, S.S.)

Levine:

438 simsii var. simsii; 1533 farrerae; 1563 mariae subsp. mariae

Li: 68 microphyton; 131 simsii var. simsii

Li, An

Ren:

7850 microphyton

Li, Bing

Gui:

13 hunanense; 35 mariesii; 42 simsii var. simsii; 101 hunanense; 132

rhuyuenense; 750145 mariesii

Li, Bing

Gui &

Wang,

S.B.: 5104, 5281 kwangtungense; 5283 hunanense

Li, De

Jiu:

3609 microphyton

Li,

G.F.:

60425, 60475 60480, 60532 mariesii; 60595, 60665, 60694, 60776 simsii var.

simsii; 61180 mariesii;

61381,

61387, 61655, 62050, 62064 simsii var. simsii; 63681

mariesii; 64084 simsii var. simsii; 64107 mariesii; 64208, 64365 simsii var. simsii;

64725 rivulare; 64830, 64958, 65059 simsii var. simsii

Li, G.Z.: 10626 bellum; 70720

flosculum;

11526 bellum; 11541 mariae subsp. kwang-

siense;

11620

flosculum

Li, G.Z.

Huang,

F.X.:

39,134 bellum

Li, H.C.: 5596, 6209, 6211 mariesii; 6436 chrysocalyx; 7274, 7296, 7741 simsii var.

simsii

Li,

L.G.: 731

rufulum;

741

florulentum,-

821

loniceriflorum; 841,851

florulentum;

7487

seniavinii;

64073,65093 simsii

var.

simsii;

720310,730008

seniavinii;

730009

petilum;

740123 loniceriflorum; 740125 rufulum; 740501 florulentum; 740740 apricum;

750103 polyraphidoideum

Li, M.K.: All, 704, 2116 microphyton; 3398 simsii var. simsii

Li, M.R.: 1029, 1084 microphyton

Li, M.S.: 931 seniavinii

Li, i'.r.:8760mariesi

Li, Q.H. &

Chen,

103, 303, 481, 519,

593,1268 simsii var. simsii

Li,

S.G.:

80902 simsii var. simsii

Li, S.T.: 80-390 simsii var. simsii

Li, X.G.: 200087 mariae subsp. kwangsiense; 200748 naamkwanense var.

naamkwanense; 200953 taipaoense; 200996 farrerae; 201347 mariae subsp. mariae;

201454, 201579 farrerae;

201931,

202362 mariesii; 202426 taipaoense; 202549 flo-

rulentum;

202824

seniavinii;

203904,203966 farrerae;

204345

mariesii;

204346

simsii

var. simsii

RHODODENDRON SUBGENUS TSUTSUSI 165

Li, X.P.: 12193 mariesii

Li, Y.K.: 400031 mariae subsp. kwangsiense; 400170, 400309, 400482 mariae subsp.

mariae; 401515 viscigemmatum; 402782 simsii var. simsii; 403015 rivulare

Li, Y.K. & Shue: 548 mariae subsp. mariae

Li, Z.T.: 239, 1016 seniavinii; 1866 simsii var. simsii; 2010 seniavinii; 2113, 2473

rivulare; 2629 seniavinii; 603074 mariae subsp. mariae; 603522 minutiflorum;

603739 mariae subsp. kwangsiense; 604110 kwangtungense

Li, Z.T. & Chen Y.C.: 600053 simsii var. simsii; 600150, 600207 rivulare; 600462,

600502 minutiflorum

Li, Zhang Yu et al.\ 1449 seniavinii

Liang, B.H.: 83479 mariesii; 83599 hunanense; 84170, 84172 kwangtungense; 84208

mariesii; 84314 mariae subsp. mariae; 84468, 84585, 84760 kwangtungense; 84906

simsii var. simsii; 85921 mariesii; 85937 simsii var. simsii

Liang, Chou Fen: 30202 mariae subsp. kwangsiense; 30241, 30304 farrerae; 30308,

30711 rivulare; 31812 mariesii

Liang, H.\ 100170 simsii var. simsii

Liang, H.R. & Wong, Y.C.: 31284 kwangtungense

Liang, Xiang Ri: 60030, 60400, 60817, 60827 mariae subsp. mariae; 63701b, 64087,

68059 hainanense; 69929 meridionale var. meridionale; 70050 mariae subsp. mariae

Liang, Yuan: 7846 microphyton

Liao & Kuo: 2155 oldhamii

Liao,

D. W. et ah: 1-63, 3-28, 4-02 simsii var. simsii

Libo Exp.: 1589 seniavinii; 2019 mariesii; 2226 seniavinii

Lin,

H.C.: 13349 taiwanalpinum

Lin,

L.G.: 700 simsii var. simsii; 6000, 6047 rufulum; 1043 tsoi aff.; 1350 mariesii;

1352 farrerae; 3040 daiyunicum; 6930 mariesii

Lin,

L.G.J.:

103 mariesii

Lin,

Qing Zhong: 92 mariesii; 273 tsoi; 519 hunanense; 10086 seniavinii

Lin,

Rong: 2004 nanpingense?; 2070 rufulum; 2077 simsii var. simsii; 2204, 2300

nanpingense; 2844 simsii var. simsii; 2847, 3124, 3351, 3368, 3494 rufulum; 3749

simsii var. simsii; 3931, 3939 rufulum; 3979 simsii var. simsii; 4407 rufulum; 15037

simsii var. simsii

Ling, B.J.: 1 farrerae

Ling, K.: 12524, 13957 mariesii

Ling, L.K. (Lin, L.G.)

Ling, P.P.: 14 mariesii

Ling, P.R. & Sun, S.S.: 61 simsii var. simsii

Ling, Qing: 770490 microphyton

Ling, W.P.: 361 mariesii

Ling, Y.C.: 2016, 2232, 2321, 2688 rufulum

Ling, Ying: 82, 122 simsii var. simsii; 200, 216 rufulum; 251, 751, 757, 13034, 15220

simsii var. simsii

Ling, Yong (Lin, Rong)

Lingnan Univ. Herb.: 6408 mariae subsp. mariae

Liu et al.: 334 taiwanalpinum; 429, 979, 2034, 2035 oldhamii

Liu,

C.F.: 632, 1078, 1839 mariesii

Liu,

J.H.: 529 kanehirai

166 EDINB.

BOT. 47(2)

Liu,

L.F.:

5516 mariae subsp. kwangsiense

Liu,

L.H.:

359 rivulare; 421,422 subflumineum; 428 kwangtungense; 778 rhuyuenense;

1814 farrerae; 1852, 15713 simsii var. simsii

Liu,

L.H.

He, G.Z.:

15431 simsii var. simsii; 16221,16277 seniavinii; 16604 rivulare

Liu,

Mei

Guang: 665 mariae subsp. mariae

Liu,

Mei

Yi: 2572 simsii var. simsii

Liu,

S.L.:

1056 simsii var. simsii

Liu,

S.R.:

20013 simsii var. simsii

Liu, Shen

E.:

859 mariae subsp. mariae; 13135, 13145, 13589, 14539, 14568, 15680,

15797,

15863, 15909, 15949, 15955, 16098, 16104, 16448, 16892, 17352, 17477,

17564, 19157, 19628, 20851, 45876 microphyton

Liu, T.N. (Liu, S.E.)

Liu, T.S. et al: 233 lasiostylum

Liu,

Tang

Rui:

225 simsii var. simsii

Liu,

Tang

Shut

179

kwangtungense

Liu, Xin

Qi (Lau,

S.K.)

Liu, Y.G.: 103 mariae subsp. mariae; 133 simsii var. simsii; 324 naamkwanense var.

cryptonerve; 963 mariae subsp. mariae; 2572 polyraphidoideum var. montanum;

2665 mariae subsp. mariae; 3117 rhuyuenense

Liu, Z.F.: 1891 seniavinii

Liu, Z.Y.: 3485 microphyton

Lo,

L.T.: 424 farrerae

Loher. 3756, 3757, 3760 subsessile

Long,

H. Y.:

7800-258, 7800-332, 7800-416 mariesii

Longsheng

Exp.: 50015, 50050 rivulare; 50133 mariae subsp. mariae; 50156, 50168,

50191 rivulare

Lu,C.W.\

1042 rivulare

Luchun

Exp.:

692 flumineum

Luh,

C.Y.: 1042mariesii

Lui,

Feng

Xuen:

10935 simsii var. simsii

Lui,

Q.H.:

2514 mariae subsp. mariae; 2537 minutiflorum

Luo,

Zong

Chuen:

870 seniavinii

LushanBot.

Garden:

18,184, 279,1770 simsii var. simsii; 3437 mariesii

Ma, Y.H.: 312 mariesii

Maingay:

882 kaempferi

Mate: 7,

321

simsii var. simsii; 1098,1099 simsii var. mesembrinum; 1101,1102,1944

microphyton; s.n. atrovirens .

Makino: 99862 decandrum; 99867, 99872 dilatatum; 99890, 99892, 99893, 99894,

99896,

99897, 99898, 99899,

99901,

99902, 99903, 99904, 99906, 99908, 99910,

99911,

99913, 99915 kaempferi; 99918 kiusianum var. sataense; 99919 kaempferi;

99925,99926,99927,99928,99929 kiusianum

var.

kiusianum; 99933,99934 nudipes

var. lagopus; 99936 macrosepalum; 101593, 101596, 101598, 101600, 101601,

101603,

101604, 101612, 101630, 101633, 101642, 101643, 101644, 101651,101664,

101681,

101688 kaempferi; 101707, 101710, 101711, 101713, 101719, 101726 kiu-

sianum var. kiusianum; 101729, 101730 nudipes var. lagopus; 101736, 101748,

101750, 101759, 101762, 101768 macrosepalum; 101789, 101791, 101792, 101794,

101795,

101796, 101797, 101799, 101800 mucronatum; 101806 macrosepalum;

RHODODENDRON SUBGENUS TSUTSUSI

167

101812 mucronatum;

101831,

101837 nudipes

var.

nudipes; 101904, 101906 retic-

ulatum; 101925 mucronatum var. ripense; 101936 reticulatum

albiflorum; 101937,

101939 sanctum; 101942 kiusianum

var.

sataense; 101945 kiusianum

var. kiu-

sianum; 101958 scabrum subsp. scabrum; 101983,101989,101991,101992,101994,

101995,

101996 serpyllifolium;

102011,

102014 eriocarpum; 102052, 102053 tosa-

ense;

102067 tschonoskii

var.

trinerve; 102078,

102081,

102087 tschonoskii

var.

tschonoskii; 102098, 102099, 102100, 102103 wadanum; 102112, 102113, 102116,

102118,102120,102124 weyrichii; 102129,102130 yedoense var. yedoense; 102222,

102224 decandrum; 102227 macrosepalum; 102250,

102251,

102252, 102253

kaempferi; 102265 kiusianum

var.

kiusianum; 102266 kiusianum

var.

sataense;

102267,

102268, 102269, 102270 kiyosumense; 102273, 102276 macrosepalum;

102279,102280 mucronatum var. mucronatum; 102307,102315 reticulatum; 102316

nudipes

var.

nudipes; 102319, 102322 reticulatum; 102325 nudipes/kiyosumense;

102326 mucronatum var. ripense; 102331,102332 sanctum; 102344,102346,102347,

102348 serpyllifolium; 102365,102366 wadanum; 102369,102372,102374 weyrichii

Mao,

P.Y.: 1412

simsii

var.

simsii

Mao.

S.H.: 122, 265

mariesii

Maries'.

472

wadanum

Masamune:

s.n.

yakumontanum

Masamune

et al.: 2915

taiwanalpinum

Mathew: 4888 mariae subsp. mariae

Matsudo:

221

decandrum

Maximovicz:

s.n.

reticulatum

Mayebara:

2159

mayebarae; 5425 hyugaense

McCalf:

518, 708, 7413

simsii

var.

simsii

McClure:

348

florulentum; 1502 simsii var. simsii; 1509 huiyangense; 13308 simsii

var.

simsii

McGregor.

136

microphyton

McLaren:

36,

microphyton A0039 microphyton AA068 simsii

var.

simsii; AA074,

AA076 microphyton; AA080, AA082, AA083 simsii

var.

mesembrinum; AA086

microphyton; AA093 simsii

var.

simsii; AA098, AA110, AA112,

AA121,

AA125,

AA127,

AA145, AA166, C0047, L0039 microphyton; L0152, U0002 simsii

var.

simsii; U0025, U0068, U0085 microphyton; U0188, U0195 simsii

var.

simsii

Mendoza: 40327 subsessile

Merrill:

2015

mariae subsp. mariae; 4606, 4690,

4815

subsessile; 11103 mariae subsp.

mariae

Metcalf:

7338,

7412

farrerae

Meyer:

1607

simsii

var.

simsii

Min,

Y.: 177, 292,

740507 simsii

var.

simsii

Minamidani:

s.n.

nudipes

var.

kirishimense

Mizushima:

123

dilatatum;

284

tschonoskii

var.

tschonoskii;

808

amagianum;

888

kaempferi; 979,991,993 dilatatum; 1056 kaempferi; 1252 tschonoskii var. tschono-

skii;

1365,

1366 wadanum; 1375 kaempferi;

1432, 1433,

1435 wadanum;

1510, 1822

kaempferi; 1872,1874 wadanum; 1884 dilatatum; 1930,1957,1962 kaempferi;

1972

wadanum; 2077,2210 tschonoskii var. tschonoskii; 2335 dilatatum; 2366 wadanum;

2423 kaempferi; 2449 serpyllifolium; 2457 amagianum;

3010

nudipes

var.

nudipes;

10192 tschonoskii

var.

tschonoskii; 10886 kaempferi;

11096

tschonoskii

var. tri-

168 EDINB. J. BOT. 47(2)

nerve;

11097 tschonoskii var. tschonoskii; 11304, 11426, 11452 kaempferi; 11637,

11648,

14404 dilatatum

Mo,

X.M.: 20694, 21198, 21319 simsii var. simsii; 21507 mariesii

Mori: 331 oldhamii

Murata: 547 wadanum; 2086 tschonoskii var. tschonoskii; 9519 reticulatum; 9706

nudipes var. nudipes; 9836 reticulatum; 11559 macrosepalum; 12527 kaempferi;

15008 weyrichii; 18651 mucronatum var. ripense; 19013 tschonoskii var. trinerve;

19470 nudipes var. nudipes; 40952 reticulatum

Murata & Konta: 480 serpyllifolium

Murata & Nishushimura: 680 serpyllifolium

Murata & Shimizu: 824 nudipes var. tsurugisanense

Murata & Yang, T.Y.: 17627 oldhamii

Murata et al.\ 112 kiyosumense; 148 nudipes var. niphophilum; 223 weyrichii; 976

nudipes var. nudipes; 4592 dilatatum; 20590 nudipes var. niphophilum

Muroi: 2 kaempferi; 292 reticulatum; 300 serpyllifolium; 311 kaempferi; 324 ser-

pyllifolium; 538 kaempferi; 587 weyrichii; 627, 909 serpyllifolium; 997 reticulatum;

1123 kaempferi; 1125, 1136 nudipes var. lagopus; 1137, 1141 kaempferi; 1153

reticulatum; 1519,1536,1632 serpyllifolium; 1663 reticulatum; 1705 serpyllifolium;

1714 reticulatum; 1866 mucronatum var. ripense; 1892 serpyllifolium; 1998 mucron-

atum var. ripense; 2083 nudipes var. nudipes; 2106 serpyllifolium; 2111 kaempferi;

2124 nudipes var. nudipes; 2138 kaempferi; 2414, 2830 serpyllifolium; 3110

kaempferi; 3115 serpyllifolium; 3368,3396 tschonoskii var. tschonoskii; 3426,3691,

3973 kaempferi; 4136, 4157 tschonoskii var. tschonoskii; 4301 yedoense var. pou-

khanense; 4339, 4362, 4385, 4392, 4458 tschonoskii var. tschonoskii; 4519, 4668

kaempferi; 4809, 4891 reticulatum; 5152 yedoense var. poukhanense; 5266 dila-

tatum; 5536, 5560 kaempferi; 5765 tschonoskii var. tschonoskii; 5809 kiusianum

var. kiusianum; 5848 kaempferi; 5849 serpyllifolium; 5851 kaempferi; 5858 retic-

ulatum; 5866 kaempferi; 5874 serpyllifolium; 6225 kaempferi; 6275, 6316, 6354

reticulatum; 6420 kiusianum var. kiusianum; 6430 serpyllifolium; 6467 kiusianum

var. kiusianum; 6471 serpyllifolium; 6497, 6557, 6629 reticulatum; 6636, 6656 ser-

pyllifolium; 6682 kaempferi; 6688 kiusianum var. kiusianum; 6712 serpyllifolium

Naamkwan Exp.: 70910 naamkwanense var. naamkwanense; 71415 tsoi; 82405

naamkwanense var. naamkwanense

Nagasawa: 239 mariesii

Naite: s.n. tashiroi

Naithani: 2:894 arunachalense.

Nakai, T.: s.n. x komatzui

Nakaike: 644 scabrum subsp. amanoi

Nakamura: 3627 breviperulatum

Nan,

Z.D.:

6083,

6158 kwangtungense

Nan,

Z.P. & Tan, P.X.: 61909 simsii var. simsii

Nanjing Forestry Coll. Exp.: 6237, 7250-29 mariesii

Naruhashi: 1296 mucronatum var. ripense; 1300 weyrichii

Naruhashi & Konta: 43 reticulatum

Naruhashi et al.: 1358 nudipes var. lagopus

Nie, M.X.{Ni,

N.C.):

1998 simsii var. simsii; 2026 mariesii; 2118 simsii var. simsii;

2483 mariesii; 2705, 3519, 3735, 3970 simsii var. simsii; 4878, 4896 mariesii; 5085

RHODODENDRON SUBGENUS TSUTSUSI

169

simsii var. simsii; 5950 mariesii; 6391, 6489 simsii var. simsii; 6821 mariesii; 7741,

8056 simsii var. simsii; 8267 rhuyuenense 8340, 8560, 8764, 9897 simsii var. simsii

Nie,

M.X.

& Chen,

S.L.:

6905, 6906 mariesii; 7204 simsii var. simsii; 7205 mariesii

Nie,

M.X.

Lai, S.K.:

3068, 4290 simsii var. simsii

Nie,

M.X.

Lai, S.S.:

2485 mariesii

Nishida: 10490 serpyllifolium

MM,

S.S.:

7993 kwangtungense

Ohashi

et at.

1380 kaempferi; 1381, 2040 wadanum; 9082 tashiroi

Ohwi: 212 kaempferi

Ohwi & Okamoto: 442 wadanum; 478 dilatatum

Oldham:

505, 506, 507 kaempferi; 511 weyrichii

Page: 10090, 10093, 10095 rubropilosum

Per. 3847 simsii var. simsii; 3986 mariesii

Peking Centre: 69, 929,1107 microphyton; 1360 simsii var. simsii

Peking Centre Jiangxi Tm.: 2882, 4148 simsii var. simsii

Peng,

P.S.:

790 mariesii

Petelot: 3826 saxicolum; 4218 simsii var. simsii; 6340 saxicolum

PI. Geog. Exp.: 16 farrerae; 7365 mariesii; 7911 farrerae

Poilane: 7932,17076, 25419 saxicolum; 29733, 29744,29777, 32197, simsii var. simsii

(annamense)

Price: 96,278,693 oldhamii; 802a oldhamii?; 843 lasiostylum; 943 rubropilosum; F30

oldhamii

Put: 3325 saxicolum?

Qi, C.J. (Chi, T.C.)

Qi, P.X.: 1565 mariesii

Qian,

S.X.: 581 polyraphidoideum

Qin,

H.F.: 700001 rivulare; 700143 kwangtungense; 700705 minutiflorum; 700795

rivulare;

700835,

701154 mariae subsp. mariae

Qin,

H.F. & Li, Z.T.: 70012 mariae subsp. mariae; 70013 mariae subsp. kwangsiense;

70333 minutiflorum

Qingnan Exp.: 584, 878, 1807, 2065, 3351, 3476 seniavinii

Qiu, Bing Yuan: 195 farrerae; 52404, 54495, 58907, 59075, 596152 microphyton

Quisunbing & Sulit: 82398 subsessile

Ramos &

Edward:

10308, 37708, 40308 subsessile

Rock:

3008, 3046, 3058, 3106, 3163, 7075, 7077, 7272, 7974, 8008, 8010 microphyton;

25217 simsii var. simsii; 25222, 25227a, 25228, microphyton; 25233 simsii var.

simsii; 25239 microphyton

Saito:

14716 nudipes var. niphophilum

Sako:

3348, 3252 osuzuyamense

Sampson: 376 simsii var. simsii

Sands: 3155 subsessile

Santos: 38 subsessile

Sasaki: 333 rubropilosum; 21518 kanehirai

Sato:

10449 tashiroi; 10450 serpyllifolium

Savatier. Til kiyosumense; 766 macrosepalum;

Sawada: 860 amagianum; 861 dilatatum; s.n. tosaense

Schaeffer: s.n. hainanense

170 EDINB. J. BOT. 47(2)

Schindler: 443 marisii; 445 simsii var. simsii

Schneider: 98, 175 microphyton; 353 rufohirtum; 876 microphyton; 4040 rufohirtum;

Schoch:

350c rufohirtum

Shen,

S.J.: 167 simsii var. simsii

Shi, G.L.: 11363 mariesii

Shi, G.L. & Ling, T.\ 324 mariae subsp. mariae

Shimizu: 3266 oldhamii; 17239 nudipes var. nudipes

Shimizu & Chuang: 20136 nakaharai; 20197 rubropilosum

Shiota: 2336 wadanum; 2504 nudipes?; 2508 kaempferi;

2533,

2534, 2535 tschonoskii

var. tschonoskii; 2738 serpyllifolium; 4898 reticulatum; 6969 nudipes var. nudipes;

Shizong Exp.: 68, 69, 74, 112, 164, 165, 166, 167, 168, 169, 174 simsii var. simsii

Shut 4562 microphyton

Sichuan Econ. PI. Exp.'. 311 simsii var. simsii

Sichuan & Guizhou Exp.: 2210 mariesii

Silvestri: 1696, 1701 simsii var. simsii

Sinclair: 9393 wadanum; 9408 kaempferi

Sinclair & Edemo: 9802 subsessile

Sino-American Bot. Exp.: 84-0774 simsii var. simsii; 84-0787 mariesii; 84-1014 mic-

rophyton; 84-1425, 84-1932 simsii var. simsii

Sino-British Exp. Cangshan: 629, K113, K143 microphyton

Sino-German Exp.: 142, 150 simsii var. simsii; 155 mariesii; 165 simsii var. simsii; 998

mariae subsp. mariae; 1081, 1171 simsii// var. simsii

Sino-Russian Exp.: 32 microphyton; 1412, 1481 flumineum

Smith:

48 hainanense

Smith,

H.: 1670 microphyton

Sonohara et al.: 7102 tashiroi

S China Bot. Inst.: 120 simsii var. simsii; 1543 mariesii; 171937, 171939, 220197,

220855, 271636 rivulare; 373755 farrerae

S Guizhou Exp.: 179, 361, 423, 516, 696, 876 simsii var. simsii; 879, 1042 mariesii;

1433,

1442, 2064 simsii var. simsii; 2065 seniavinii; 2839, 3743 rivulare; 4239 simsii

var. simsii; 4264 mariesii; 5701 microphyton; 8472 mariesii

SWNormal Coll.: 216 mariesii

Spaulding: 461 microphyton

Squires: 94 simsii var. simsii (annamense)

Steward:

2440, 5236, 5262 simsii var. simsii

Steward et al.: 147 simsii var. simsii; 280 mariae subsp. mariae; 721 simsii var. simsii;

773 seniavinii; 822 seniavinii aff.

Su Koe: 9176 microphyton; 9265, 9830, 9858 simsii var. simsii; 9876 microphyton;

17250 simsii var. mesembrinum

Su,

S.M.: 419 mariesii

Sugimoto: 2527 serpyllifolium

Sulit: 1493, 7572 subsessile

Sun,

San Shen: 14, 41 simsii var. simsii

Sun,

S.C.: 1060 simsii var. simsii

Susuki: 10,28, 70,105 kaempferi; 106 wadanum; 5750,13217 oldhamii; 21277 macro-

sepalum; AA1026 dilatatum; ST16433 oldhamii

Susuki, M. et al.: 9580 wadanum

RHODODENDRON SUBGENUS TSUTSUSI 171

Tagawa:

7208, 1069 macrosepalum;

24323

dilatatum var. satsumense;

89101,

89102,

89103

hyugaense;

s.n.

amakusaense;

s.n.

mayebarae var. obsumiense

Takahashi:

358 kaempferi; 1009 serpyllifolium;

1013

decandrum;

1033

macrosepalum

Tan,

P.X. (Tarn,

P.C.):

7317 tsoi; 7318 mariesii; 7328 mariae subsp. mariae; 7332

mariesii;

7333;

7335 mariae subsp. mariae; 7336 simsii var. simsii (annamense);

7344

kwangtungense; 7345, 7347 7348 simsii var. simsii; 8045, 57958, 58090, 58329,

58474, 58608, 58939 mariae subsp. mariae; 58964 simsii var. simsii; 59466 mariae

subsp. mariae; 59772 minutiflorum; 59970 mariae subsp. mariae; 60326 simsii var.

simsii; 60344 mariae subsp. mariae; 60559 seniavinii; 60590 qianyangense; 61275

hunariense; 61685 kwangtungense; 61824 mariae subsp. mariae; 62369 mariesii;

62425

kwangtungense;

62643

mariesii; 62736 rivulare; 62806 farrerae; 62812 marie-

sii;

63017 rivulare; 63385 seniavinii

Tan,

S.X.: 354 chrysocalyx

Tan,

Ying

Hua:

223,

565 simsii var. simsii; 608 mariae subsp. mariae; 617 farrerae

Tanaka:

71 kaempferi; 526 rubropilosum; 1758, 10993 oldhamii; 100388 kaempferi;

100453 reticulatum;

Tang,

H.C.Sl, 489 farrerae; 1267 simsii var. simsii; 2269 farrerae

Tang,

RuiJin:

1213,

6745,

6803,

7491,

7526,13560,

simsii var. simsii;

13565

mariesii

Tang,

You

Heng:

71 simsii var. simsii

Tang,

Z.Z.:

3896

farrerae; 50468 simsii var. simsii

Tarn,

P.C.

{Tan,

P.X.)

Taoda:

3285 weyricbii; 3445 reticulatum

Taquet:

305 yedoense var. poukhanense; 307, 1089 weyrichii; 1090, 1091 yedoense

var. poukhanense;

2970

weyrichii;

2972

yedoense var. poukhanense;

4678

weyrichii;

4679,

4690,

5783,

5784 yedoense var. poukhanense; 5785, 5786, 5787 weyrichii

Tashiro:

101952 scabrum var. scabrum

Tawada:

13272 kaempferi; 13279 tschonoskii var. tschonoskii

Ten,

S.\ 83, 86, 1417 microphyton

Teng,

L.\ 112 kwangtungense; 314 mariae subsp. mariae; 322 simsii var. simsii; 329

mariae subsp. mariae; 350 mariesii; 909, 1007 kwangtungense; 1124 simsii var.

simsii; 3587 hainanense; 3994 mariesii; 4012 simsii var. simsii; 4157 mariesii; 4437

naamkwanense var. cryptonerve; 4669

florulentum;

4674 farrerae; 4862 simsii var.

simsii; 4963 florulentum; 5107 farrerae; 5614 rhuyuenense; 6161 simsii var. simsii;

6982,

7654 kwangtungense; 8045, 8597, 8624 mariae subsp. mariae; 8654 rivulare;

8926,9990,9992 simsii var. simsii;

10105

mariae

subsp.

mariae; 10513,11070 simsii

var. simsii; 11071 farrerae; 11072 kwangtungense; 11073 mariae subsp. mariae

Teng,

S.F.

{Deng,

S.F.)

Tian,

Q.J. et at.

1-21,

2-38,

3-14

sparsifolium

Tianluoshan

Exp.:

2560, 3358, 3391 hainanense

To,

K.P.:

2370 mariae subsp. mariae

Togashi:

33 serpyllifolium; 336 indicum; 340 sanctum; 379 dilatatum; 380 indicum;

381 kaempferi; 385 nudipes var. nudipes; 388 sanctum; 390 serpyllifolium f. albi-

florum; 391 tosaense; 392 tashiroi; 393 tosaense; 394 tschonoskii var. tschonoskii;

395 wadanum; 397 reticulatum; 698 macrosepalum; 729 nudipes var. nudipes; 927

macrosepalum; 1029 serpyllifolium; 1460 tashiroi; 1644 weyrichii; 7893 wadanum;

9096 kaempferi; 9097, 10227 reticulatum; 10610 wadanum; 10633 nudipes var.

nudipes

172 EDINB.

BOT.

47(2)

Togashi

Idzumi:

339

reticulatum

Tohda,

H. et ah:

2013 kaempferi

Toyoshima: 10229 boninense

Tsai, C.S. (Cai,C. X.)

Tsai, H.T.: 53025 microphyton; 53051 simsii var. simsii; 53343, 53349, 53424, 53478,

53929,

54929, 55597 microphyton; 55640 simsii var. simsii; 55646, 55670, 56630

microphyton; 57043 simsii var. simsii; 58539, 59160 microphyton

Tsang, CK: 25171 simsii var. simsii

Tsang, T.H. & Cheng, Y.T.: 148, 268 chrysocalyx

Tsang, T.S.:

400821,

401298 seniavinii

Tsang, W.T. (Ceng, H.D.)

Tseng, C.J.: 150 simsii var. simsii; 12646 mariae subsp. mariae

Tseng, C.J. & Ling, P.: 1001 simsii var, simsii

Tseng, Y.C. (Cheng, Y.Q.)

Tsiang, C.J.: 5342 simsii var. simsii

Tsiang, Hsin Hing: 20417 microphyton

Tsiang, Y. & Chen, S.Q.: 365, 374 yangmingshanense; 400 simsii var. simsii; 670

rhodanthum

Tsiang, Y. & Wang, H.: 16299, 16300 microphyton

Tsiang, Ying (Jiang, Y.)\

21A

simsii var. simsii; 587 farrerae; 589 mariae subsp. mariae;

595 farrerae; 1292, 1311 kwangtungense; 1508, 1980 mariae subsp. mariae; 4786,

5012,

5872 rivulare; 9072 simsii var. simsii; 10351 mariesii; 10358, 10570 simsii var.

simsii; 11105 mariesii; 16595 farrerae; 120250 microphyton

Tsien,

C.P.: 50098 rivulare; 50269,50277 mariae subsp. mariae; 50305, 50306 rivulare;

50403 seniavinii; 50640, 50804 rivulare; 51101 mariesii; 51683 rivulare

Tsoong,

C.H.(Chung,

Z.S.)

Tsoong, K.K.: 59, D12 mariesii

Tsui, T.M.: 129 huiyangense; 766 mariae subsp. mariae

Tu,

D.H.: 2750 mariesii

Tung, S.C.: 494 jinpingense

Uno:

22920, 23594, 23750 yedoense var. poukhanense

Ushiwa: lc-f eriocarpum

Ushiyama: 30146 yedoense var. poukhanense

Van Royen & Sleumer. 5613 subsessile

Wakama: 2705, 2707 kaempferi; 6691, 6695 scabrum subsp. amanoi

Wang, A.J.: 1 farrerae; 610, 612, 613, 614, 616, 617 mariae subsp. mariae; 618

bicorniculatum 619, 800 mariae subsp. mariae; 3016 tsoi

Wang, C. (Huang, Z.)

Wang,

C.(Z.)

& Liu, S.E.: 638 pulchrum

Wang, C.

W:.

62110,62781,62789,73115,73332 microphyton; 73653 simsii var. simsii;

82538,

82692, 83877, 84156 microphyton; 84269 simsii var. simsii; 84317,

84971,

85062,

86574, 86754, 86786 microphyton; 87057, 87442 simsii var. simsii; 87653,

87779,

87799 microphyton; 87935, 88923, simsii var. simsii; 89143 microphyton;

89158 simsii var. simsii

Wang, C.W. & Liu, Y.: 90832, 90833, 90834 simsii var. simsii

Wang, D.X.: 122, 238, 413 simsii var. simsii; 700, 809, 921 rufulum; 975,1062 simsii

var. simsii; 1087 rivulare; 1347 simsii var. simsii

RHODODENDRON SUBGENUS TSUTSUSI

173

Wang, F.T.: 1045,1700,20445 simsii var. simsii; 22749,22793 atrovirens; 22797 simsii

var. simsii

Wang,

H.C.:

112 simsii var. simsii; 1651, 1672, 1695, 1700, 1710, 1775, 1874, 1876,

2647,3443,3514 microphyton; 3545 simsii var. simsii; 3574, 3681, 3786, 3789,3827,

3831,3836,3838,3841,3854,3859,3890,3972,3974,3978,3985,3988 microphyton;

4177,

4191, 4192 simsii var. simsii; 4193, 4195, 4324, 4326, 4328, 4329, 4331 mic-

rophyton; 4333 simsii var. simsii; 4336,

4343,

4586, 4589, 4616 microphyton; 4630

simsii var. simsii; 4712,4718, 4720 microphyton

Wang,

H.J. et al:

422, 431 mariesii

Wang, J.C.: 204 simsii var. simsii

Wang,

J.X.:

1707 mariesii

Wang, Ming Jing (M.K.):

150

mariesii; 478 simsii var. simsii; 1229 mariesii;

1230

simsii var. simsii; 2452 mariesii; 3032 polyraphidoideum; 3245 mariesii

Wang, P.H.: 12, 1277 simsii var. simsii

Wang, Q.J.: 2585 simsii var. simsii

Wang,

S.W. &

Chang, K.C.: 358 mariesii

Wang,

T.H.:

3, 135 simsii var. simsii; 12065 seniavinii

Wang,

T.P.:

1046, 10812 simsii var. simsii; 10657 mariesii; 11446 simsii var. simsii;

11463 mariesii

Wang, W.C.: 2065 mariesii; 60363 simsii var. simsii

Wang,

Z.R.:

3619 minutiflorum; 5339 simsii var. simsii

Wang,

Zuo

Bin {Wang,

T.P.)

Way,

M.J.:

3148 mariesii

Wei, C.F. {Wei,

Z.F.)

Wei, F.N.: 772, 809

subenerve; 894 jinxiuense

Wei,

Z.F:. 120029 mariae subsp. mariae; 120391 simsii var. simsii; 120934 mariesii;

121593 farrerae ; 121779, 121819 mariae subsp. mariae

Wei,

Z.Y.: 40205,

40301

mariae subsp. mariae

Wenshan

Exp:.

222 microphyton

Wilford:

145 farrerae

Wilson:

1682

simsii

var.

simsii; 3472,3473 simsii var. mesembrinum; 3474,3475 simsii;

A00569 simsii var. mesembrinum?. A00606, A01681 mariesii; A05143 simsii var.

simsii; A06003 indicum; A06005 tashiroi; A06158 reticulatum; A06278 kaempferi;

A06338 kiusianum var. kiusianum; A06339 mucronatum?; A06439, A06448 dila-

tatum; A06558, A06573 reticulatum; A06574 macrosepalum; A06575 kaempferi;

A06596 macrosepalum; A06610 kaempferi; A06640 wadanum; A06679 kaempferi;

A06705

nudipes

var.

lagopus;

A06807

kaempferi; A06816 indicum

var.

crispiflorum;

A06818,

A06880, A06888, A06932 indicum; A07122, A07233, A07234, A07235

tschonoskii var. tschonoskii; A07455 indicum; A07583, A07657 tschonoskii var.

tschonoskii;

A07694 nudipes

var.

lagopus;

A07709

indicum;

A07794 macrosepalum;

A07801 tosaense; A07813 weyrichii; A07842 reticulatum; A08046 scabrum subsp.

scabrum; A08095 tashiroi; A08200, A08416 kaempferi; A08417 kiusianum var.

kiusianum; A08420, A08424 kaempferi; A08472, A09396 yedoense var. pou-

khanense;

A09411

weyrichii; A09458 yedoense

var.

poukhanense; A09595 tschono-

skii var. tschonoskii; A09728 rubropilosum; A09778 oldhamii; A09779 rubro-

pilosum;

A09980

oldhamii;

A10020

lasiostylum;

A10029,

A10165

oldhamii; A10276

kanehirai; A10316 oldhamii; A10326 kaempferi; A10327, A10328, A10329 kiu-

174 EDINB. J. BOT. 47(2)

sianum var. kiusianum; A10330 kaempferi; A1O333 kiusianum var. kiusianum;

A10334, A10343 kaempferi; A10344 scabrum subsp. scabrum; A10346 x tectum?;

A10347 kaempferi; A10348, A10355 macrosepalum; A10365, A10368 kaempferi;

A10369 reticulatum; A10379, A10380, A10381 kaempferi; A10939 rubropilosum;

A10957 kiusianum var. kiusianum; Al 1175 oldhamii; V00029 mariesii

Wong, H.D.: 8178 kwangtungense

Wong, S.: 161405 farrerae

Wood

Boufford:

3676 macrosepalum; 3727, 3752 kaempferi; 3827 lasiostylum

Wright: 171 tashiroi; 172 scabrum subsp. scabrum; 195 farrerae

Wright, C: 186, 483 farrerae

Wu, C.A.: 7353,7762,7954,9054 microphyton; 9568 flumineum; 9671 simsii var. simsii

Wu, C.N. & Tan, P.C.: 7340 kwangtungense

Wu, D.C.: 741 simsii var. simsii; 742, 746, 747, 748 mariae subsp. mariae; 751

bicorniculatum; 900 litchiifolium; 902 chaoanense; 904 simsii var. simsii; 905 mariae

subsp. mariae; 906, 907 naamkwanense var. naamkwanense; 3017 kwangtungense;

751031 taipaoense

Wu, S.: 7737 simsii var. simsii

Wu, S.K.: 6882, 8162 simsii var. simsii; 61-3589 flumineum

Wu, S.Z.: 70004 simsii var. simsii; 70180 mariae subsp. mariae

Wu, W.C.: 3576, 4031 mariesii

Wu, Zheng Yi: L-131 simsii var. simsii; L-146, 77-1203 mariesii

WuyiExp.:

80-0201,

80-0937, 80-0987, 80-2241 farrerae

Xhong, H.H. & Sun, S.C.: 696 mariesii

Xiamen University Exp.: 233 farrerae; 296 rufulum; 8564 farrerae

Xiao, J.G. & Qi, C.J.: 3335 seniavinii

Xie, L.\ 38 mariae subsp. mariae

Xie, L.S.: 682 hainanense

Xin,

S.Z.: 259, 372 minutiflorum; 404 mariesii; 8961 minutiflorum; 9366, 9454,11024

kwangtungense; 20035 rivulare; 20206 minutiflorum; 21018, 21119 mariae subsp.

kwangsiense; 21136 farrerae; 21188 yaoshanicum; 21255 minutiflorum; 22010,

22104, 22120 mariae subsp. kwangsiense; 23758 mariesii

Xing, J.C.: 16352, 17861 simsii var. simsii

Xiong, J.: 840 mariae?; 2309 simsii var. simsii; 2389, 2437 mariesii; 3819 simsii var.

simsii; 4769 mariesii; 5144, 5976 simsii var. simsii; 5982 mariesii

Xiong, Ji Hua (Hsiung): 90589, 90675, 91588, 91982, 92888, 92889, 93025, 93830

mariesii

Xiong, J.H. & Tso, S.L.:

90761,

93142 simsii var. simsii

Xiong, Jie: 1770 simsii var. simsii

Xiong, Y.G.: 240, 4137 simsii var. simsii; 4138, 5500 mariesii; 5522 simsii var. simsii;

7914 mariesii; 9851 simsii var. simsii

Xu, Bing Sheng: 1319 mariesii

Xu, Su Gui: 4618 microphyton

Xu, X.H.: 1048 simsii var. simsii

Xun, J.: 2422, 2431, 3032 polyraphidoideum

Yamamoto & Mori: YM105 oldhamii; YM473 breviperulatum

Yamazaki: 235 taiwanalpinum; 690 tosaense; 691 kiyosumense; 746 kaempferi; 883

tschonoskii var. tschonoskii; 974 x enomotoi; 1032 tschonoskii var. tschonoskii;

RHODODENDRON SUBGENUS TSUTSUSI 175

1051,1128 nudipes var. tsurugisanense; 1362 indicum; 2299 dilatatum; 2533, 2574

dilatatum var. satsumense; 3807 dilatatum; 3818 kaempferi; 6168 indicum; 6208

wadanum; 6503 dilatatum; 6738 nudipes var. niphophilum; 6899 tashiroi; 7255

amagianum; 7706 yakumontanum; 7716 nudipes var. nudipes; 7742 indicum; 7747

tashiroi; 9502 kiyosumense; 9769 mayebarae; 10564 nudipes var. niphophilum;

19123 tashiroi

Yamazaki & Kanai: 7821, 10959 reticulatum

Yang: 3044 simsii var. simsii; 3059 mariesii; 3066 simsii var. simsii; 101443, 101683

microphyton

Yang, B.M.: 2425 mariesii

Yang, G.B. & Yao Gan: 2401 mariae subsp. mariae

Yang, G.H.: 54281,54841, 55850, 57706 simsii var. simsii; 57761 mariesii; 57762 simsii

var. simsii; 57764, 57782, 57888 mariesii; 57889 simsii var. simsii; 57890, 58282

mariesii; 58284 simsii var. simsii; 58314, 59910 mariesii; 59938, 65203 simsii var.

simsii; 65503, 65530 mariesii; 65626 simsii var. simsii

Yang, J.X. & Liang, Y.M.: 2880 mariesii

Yang, Qing Zhou: 1578 mariesii

Yang, S.H.: 56925 simsii var. simsii

Yang, Xiang Xie: 10302 mariesii; 60363 simsii var. simsii; 650218, 650454 mariesii;

650643,

651043, 652219 simsii var. simsii

Yang, Y.C.: 421 simsii var. simsii

Yang, Z.P.: 1125 mariesii

Yao,

Q.F.: 10 mariesii

Yi, W.C.: 62, 82, 828 microphyton

Yie, D.M.: 1089 mariesii

Yieh,

D.C.: 375 mariesii

Ying, S.S.: 617,1121 rubropilosum; 2530 tashiroi; 3825 sikayotaizanense; 4765,4770,

4774, 4780 mariesii; 4781,4782, 4783, 4784, 4785, 4786 nakaharai

Yoshinaga: 24, 31 reticulatum

Yu,

P.H.: 318 chrysocalyx; 332 rufohirtum; 575 simsii var. simsii

Yu,

S.L.: 100332 rivulare; 900429 mariae subsp. mariae; 900515 simsii var. simsii

Yu,

T.T.: 737 simsii var. simsii; 5079 farrerae; 8167 simsii var. mesembrinum; 15812,

17734,

17908 microphyton

Yu,

Wang: 21707 simsii var. simsii

Yu,

Z.R.: 1536, 1566 mariesii

Yuan,

S.F.: 6310, 6508 farrerae; 63411 minutiflorum

Yue, Jun San: 1893 simsii var. simsii; 2639, 3132 simsii var. simsii; 3417 mariesii; 4380

seniavinii var. crassifolium; 4910 simsii var. simsii; 5098 mariesii

Yue, Jun San et ah: 1088, 4117 simsii var. simsii

Zang, Shiu Yin: 3099, 3434 simsii var. simsii

Zhang, H.D.:

3533,

4641 simsii var. simsii

Zhang, Q.Q.: 7713.0003 mariesii

Zhang, S.Y.: 2813 mariesii; 2875 farrerae; 3722, 3852, 4459, 4562, 4640, 4879, 5617,

6218,

6385, 6513, 6917, 6989, 7317 mariesii

Zhang, Z.S.: 10334, 11056 mariae subsp. mariae; 11401 simsii var. simsii; 11408,

11409,

11426, 12225 mariae subsp. mariae; 12418 hainanense; 12419, 13184 mer-

idionale var. meridionale; 14890 mariae subsp. mariae

176 EDINB. J. BOT. 47(2)

Zhang, Ze Yin: 25171 simsii var. simsii

Zhangjiang Exp;. 3571 simsii var. simsii; 3690, 4244 gratiosum; 4266 hainanense aff.

Zhao,

B.H.: 205 mariesii

Zhao,

DM.: 766 simsii var. simsii

Zhao,

N.: 2079 microphyton

Zhao,

Shi Dong: 165 microphyton

Zhejiang Forestry Coll.: T80-12-079 mariesii

Zhen,

Q.X.: 815-64 mariesii

Zhong, P.Q.: 88 mariesii; 89 rufulum; 238, 429, 479 simsii var. simsii; 903a mariesii;

903b,

927a farrerae; 927b mariesii; 1008 rufulum; 1545 rivulare; 2730, 3481, 4211

mariesii; s.n. farrerae

Zhong, S.C.: 463463 mariesii

Zhong, X.X.: 1164, 1252, simsii var. simsii; 1258, 1273, 1274 mariesii; 1275 mucron-

atum; 1280, 1356, 2050 simsii var. simsii; 2250 farrerae; 2613 mariesii; 2616, 2805

simsii var. simsii; 2904 seniavinii; 3080 simsii var. simsii; 3205 farrerae; 3209, 3349

simsii var. simsii; 3708 farrerae; 4486, 5947 simsii var. simsii; 6552 farrerae; 7719

simsii var. simsii; 7799 farrerae; 8508 simsii var. simsii; 8564 farrerae; 11252 simsii

var. simsii

Zhong, X.X. & Sun, S.C.: 522, 1457 simsii var. simsii

Zhongshan Univ.: 160845 simsii var. simsii; s.n. mariesii

Zhou, He Chang: 6102 simsii var. simsii

Zhou, Hong Fu: 26023 mariesii; 26193 simsii var. simsii; 26194 mariesii; 26530, 26597

simsii var. simsii; 26608 mariesii;

26701,

26895 simsii var. simsii; 26986 mariesii

Zhou, Hong Fu & Li, He-1:107687 mariesii; 107753 simsii var. simsii; 108187 mariesii;

108949 simsii var. simsii; 109471,110734,110735, mariesii; 110738 simsii var. simsii;

110824, 110858 mariesii

Zhou, Jing Shang: 111 simsii var. simsii

Zhou, H.F. & Li, HI.: 111009 simsii var. simsii

Zhu, Guo Fang (Cheo): 135 mariesii; 136,137,138 simsii var. simsii

Zhu, H.C.: 124, 139, 719 mariesii

Zhu, T.P. & Liu, Z.F.: 836 simsii var. simsii

Zhu, Zhi Xiong: 297 kwangtungense

Zo,

Jing Lie: 134, 833, 927, 1338, 2064 mariesii; 20270 kwangtungense; 20590 simsii

var. simsii; 20627 kwangtungense; 21848 mariae subsp. mariae;- 23452 meridionale

var. meridionale

Zollinger: 382 kiusianum var. kiusianum

Zou, X.L. & Mai, Y.F.: 60655 simsii var. simsii

Zou, Y.: 210 simsii var. simsii

RHODODENDRON SUBGENUS TSUTSUSI177

MAP

1. # R.

rhuyuenense;

• R.

jinxiuense;

A R-

yaoshanicum;

V R-

hunanense;

rufohirtum;

• R. flumineum.

MAP

• R.

rivulare;

i?.

apricum;

•

/?.

rufulum;

A ^-

taipaoense;

O R.florulentum.

178

EDINB.

J. BOT. 47(2)

MAP

• R.

kwangtungense;

• R.

loniceriflorum;

O R-

tenuUaminare.

MAP

4. • R. mariae subsp.

mariae;

• subsp.

kwangsiense;

O -R-

cretaceum;

subcerinum;

/{.

chrysocalyx.

RHODODENDRON SUBGENUS TSUTSUSI179

MAP

5. • R.

meridionale

var.

meridionale;

O var.

minor;

A R-

longifalcatum;

• R.

subflumineum;

Q R.

hainanense;

R-

pulchroides;

V R.

oldhamii.

MAP

6. • R.

taiwanalpinum;

• if.

kanehirai;

A R- simsti var. simsii;

mesembrinum. var.

180

EDINB.

J. BOT. 47(2)

•Mty.Tawushan) not mapped.

RHODODENDRON SUBGENUS TSUTSUSI181

MAP

• R. scabrum

subsp.

scabrum;

subsp.

amonoi;

• R.

boninense;

shaded area

tsusiophytlum.

182

EDINB.

J. BOT. 47(2)

MAP

9. Shaded area R.

macrosepalum;

# R.

kiusianum.

RHODODENDRON SUBGENUS TSUTSUSI183

MAP

10. 0 R.

yedoense

var.

poukhanense;

• and shaded area R.

tosaense.

184

EDINB.

J. BOT. 47(2)

MAP

11.

Shaded area R.

mucronatum

var.

ripense.

RHODODENDRON SUBGENUS TSUTSUSI 185

125

130 135 140

MAP

12. • R.

eriocarpum; shaded area

indicum.

186

EDINB.

J. BOT. 47(2)

MAP

13. • R.

kaempferi.

RHODODENDRON SUBGENUS TSUTSUSI

187

MAP

14. • R.

longiperulatum;

• R.

brevipendatum;

A R-

lasiostylum;

A R. mic-

rophyton;

R-

jinpingense.

MAP

15. A R-

rubropilosum;

# R.

subenerve;

A R-

subsessile;

Q R.

atrovirens;

• /{.

fuchsiifolium;

i?-

nakaharai;

T *• saxkolum.

188

EDINB.

BOT.

47(2)

MAP

16.

R-

sikayotaizanense;

•

noriakianunt;

R-

seniavinii;

R-

qianyangense;

yangmingshanense;

J?.

naamkwanense

var.

naamkwanense;

var.

cryptonerve.

RHODODENDRON SUBGENUS TSUTSUSI189

MAP

17. • and shaded areas R.

serpyllifolium.

190

EDINB.

J. BOT. 47(2)

MAP

18. Shaded area R.

tschonoskii

var.

tschonoskii;

hatched area var.

trinerve.

RHODODENDRON SUBGENUS TSUTSUSI

191

MAP

19. • R.

bicorniculatum;

y R.

chunii;

• R.

viscigemmatum;

D R.

hejiangense;

R-

minutiflonim;

R-

myrsinifolium.

MAP

20.

• R.

unciferum;

• /?. /w/; D

R-

polyraphidoideum;

aff.

/?.

polyraphidoideum;

T ^-

gratiosum;

•*•

huiyangense.

192

EDINB.

J. BOT. 47(2)

MAP

21.

%R.mariesii.

MAP

22.

farrerae;

R-

daiyunicum.

RHODODENDRON SUBGENUS TSUTSUSI193

MAP

23.

Hatched area R.

wadanum;

0 it.

nudipes.

BOT. 47(2)

MAP

24.

Hatched area

Jt.

dilatation;

• J?.

hidak-amim;

mayebarae.

RHODODENDRON SUBGENUSTSUTSUSI

195

MAP 25

kiyosumense.

196

EDINB.

BOT.

47(2)

MAP

26.

•

ft.

weyrkhii;

R-

sanctum;

• R

amagianum.

RHODODENDRON SUBGENUS TSUTSUSI 197

ACKNOWLEDGEMENTS

We acknowledge with gratitude the directors

the herbaria

the Royal Botanic

Garden, Kew, the Natural History Museum, London, the Museum National d'His-

toire Naturelle, Paris, the Arnold Arboretum, Kyoto and Tokyo

for

facilities and

loan of specimens.

We are

grateful for the assistance that Dr Chamberlain

has

received

from the Royal Society and from the Academia Sinica which enabled him to make

five trips

China. We would like

thank the directors

the Academia Sinica

Institutes

Botany

Beijing and Kunming, the South China Botanical Institute,

and the Department

Biology, Sichuan University

for

permission

consult their

herbaria and

for

providing interpreters. Lastly we thank those staff

the Royal

Botanic Garden Edinburgh who have contributed in various ways to the production

this

Revision.

MAJOR

REFERENCES

STEVENSON,

J.B., ed. (1930).

The

Species

Rhododendron.

London.

TAM,

PUICHEUNG

(Tan, Peixiong) (1983).

Survey

the

Genus Rhododendron

South

China.

World-wide Publications, Hong Kong.

TOGASHI,

M. et

al.

(1981).

The

Species

Rhododendron in

Japan.

Seibundo Shinkosha

Publishing Co., Tokyo.

WILSON,

E.H. &

REHDER,

(1921).

Monograph

Azaleas.

Cambridge University

Press.

APPENDIX

R. arunachalense Chamberlain & Rae, sp. nov. (sect. Tsutsusi) p. 131.

saxicolo

fortasse affinis sed foliis acutioribus, colore corollae et corollae tubo intus

glabro differt.

Frutex ad 4.5m alta. Rami juveniles pilis fuscis adpressis vestiti. Folia verosimiliter

dimorphica, chartacea.

Folia

vernalia ovato-elliptica vel lanceolata, 35-65mm longa,

16-28mm lata, apice acuminata, basi cuneata, pagina inferiore praesertim ad costam

pilis strigosis adpressis runs vestita. Petioli 6-12mm longi, dense adpresse strigosi.

Inflorescentia

3-flora;

pedicellis

5-7mm

longis,indumento denso fusco

pilis magnis

strigosis et pilis tenuioribus crispatis constante. Calyx minutus,strigosus.

Corolla

late

infundibularis, extra dilute rosea, intus saturate rosea, 23-27mm

longa.

Tubus

corollae

glaber,

6-7mm

longus, basi 3mm latus, supra

6mm dilatans. Stamina

30mm

longa, basi scabrida.

Ovarium

dense strigosum; stylus glaber, 35 mm longus.

Capsula

ignota.

INDIA:

Arunachal Pradesh, Subansiri District, Yachuli, river beds, 1500m, 28

1977,

H.B.

Naithani

Ser.II:894 (hole E, iso. DD).

198

EDINB.

BOT.

47(2)

INDEX

Azalea

ser.

Azalea

subser.

Obtusum

Rehder, 94

subser.

Tashiroi

Rehder, 94

amoena

Lindley, 140

danielsiana

Pnxton,

119

farrerae (Tate) Koch, 145

iruHcaL.,

119

var.

lateritia

Lindley, 119

inctica

sensu

Sims,

kaempferi

(Planchon) Andre, 120

kiyosumensis

Makino, 149

ledifolia

Hooker, 117

lUiiflora

Poiteau, 117

macrantha

Bunge, 119

mucronata

Blume, 117

obtusa

Lindley, 140

rosmarinifolia

Burmann, 117

serpyllifolia

A.Gray, 129

squamata

Lindley, 145

Rhododendron

subgenus Tsutsusi (Sweet) Pojarkova, 93

sect. Brachycalyx Sweet, 143

sect.

Tsusiopsis

Sleumer, 94

sect. Tsutsusi Sweet, 94

subsect.

Brachycalyces

(Sweet)

Spethmann, 143

subsect

Dimorphica

Tan, 94

subsect.

Monomorphica

Tan, 94

subsect.

Obtusa

Spethman, 94

subsect.

Tashiroia

Spethmann, 94

ser. Azalea, 94

subser. Obtusum, 94

subser. Tashiroi, 94

amagianum Makino, 152

amakusaense (Yamazaki) Yamazaki, 152

amanoi

Ohv/i,

113

amoenum

(Lindley) Planchon, 140

annamense

Rehder, 116

apricum Tan, 102

\ax.falcinellum

Tan, 103

argyi

Levl.,

117

arunachalense Chamberlain & Rae, 131

atrovirens Franchet, 128

balsaminiflorum

Carriere, 120

bellum Fang & Li, 139

bicolorTan, 116

bicorniculatum Tan, 133

boninense Nakai, 118

breviperulatum Hayata, 124

breynii

Planchon, 120

burmannii

G.Don,

117

caespitulum

Tan, 135

calleryi

Planchon, 115

caryophyllum

Hayata, 125

chaoanense Wu

Tan, 139

chrysocalyx Levl., 107

chunii Fang, 133

cinereoserratum

Tan, 145

coreanum

Rehder, 115

crassimedium

Tan, 137

cretaceum Tan, 106

crispiflorum

Hooker, 120

daiyuenshanicum

Tan, 145

daiyunicum Tan, 145

decandrum Makino, 147

var.

lasiocarpum

Hara, 147

var.

pilosum

Hara, 147

var.

viscistylum

(Nakai) Hatusima, 147

lasiocarpum

Hara, 147

decumbens

[D.Don

ex]

G.Don,

119

dilatatum Miquel, 146

var.

boreale

Sugimoto, 146

var.

decandrum

Makino, 147

var.

glaucum

Hatusima, 153

var.

kiyosumense

(Makino) Hatusima, 149

var.

satsumense

Yamazaki, 147

x enomotoi Yamazaki, 114

eriocarpum (Hayata) Nakai, 118

var.

tawadae

Ohwi, 118

falcinellum

Tan, 103

farrerae

Tate,

145

var.

leucotrichum

Franchet, 145

florulentum Tan, 103

flosculum Fang & Li, 101

flumineum Fang & He, 101

fongkaiense

Tan, 104

fuchsiifolium Levl., 128

glandulistylum

Komatsu, 127, 146

glandulostylum

Fang

He, 127

gnaphalocarpum

Hayata, 144

gratiosum Tan, 137

hainanense Merrill, 109

hallaisanense

Levl., 115

hannoense

Nakai, 120

hejiangense He, 134

hepaticum

Tan, 103

hidakanum Hara, 146

hortense

Nakai, 113

huiyangense Fang

He, 138

hunanense [Chun

ex]

Tan, 100

var.

mangshanicum

Tan, 100

hypoblematosum

Tan, 137

hyugaense (Yamazaki) Yamazaki, 153

indicum (L.) Sweet, 119

f.japonicum

Maximovicz, 122

var.

smithii

Sweet, 141

var.

amoenum

(Lindley) Maximovicz, 140

RHODODENDRON SUBGENUS TSUTSUSI

199

var.

eriocarpum

Hayata, 118

var./ormasanww Hayata, 116

var.

ignescens

Sweet, 115

vat.japonicum Makino, 122

var. kaempferi (Planchon) Maximovicz,

120

var.

mikawanum

Makino, 121

var.

obtusum

(Lindley) Maximovicz, 140

var.

simsti

(Plnchon) Maximovicz, 115

var.

sinensis

Miquel, 112

var. sublanceolatum (Miquel) Makino,

113

var.

tamurai

Makino, 118

inobeanum

Honda, 147

jinpingense Fang

He, 126

jinxiuense Fang & He, 100

kaempferi Planchon, 120

var.

japonicum

Render, 122

var.

macrogemma

Nakai, 120

var.

purpureum

Nakai, 122

kanehirai Wilson, 112

kiusianum Makino, 122

var. kiusianum, 122

var. sataense (Nakai) Chamberlain &

Rae,

122

kiyosumense Makino, 149

x komatsui Yamazaki, 121

komiyamae

Makino, 123

kouytchense

Levl., 107

kwangsiense

[Hu

ex]

Tan., 106

var.

obovatifolium

Tan, 106

var.

salicinum

Tan, 106

var.

subfalcatum

Tan, 106

kwangtungense Merrill & Chun, 104

lagopus

Nakai, 151

lasiostylum Hayata, 124

ledifolium

(Hooker)

G.Don,

117

leucanthum

Bunge, 117

linearifolium

var.

macrosepalum

(Maximovicz)

Makino, 113

lingii

Chun, 99

litchifolium Wu

Tan, 139

liukiuense

Komatzu, 113

longifalcatum Tan, 109

longiperulatum Hayata, 119

loniceriflorum Tan, 104

macrogemma

(Nakai) Nakai, 121

macrosepalum Maximovicz, 113

macrostemon

Maximovicz, 140

mariae Hance, 105

subsp. kwangsiense (Tan) Chamberlain &

Rae,

106

subsp. mariae, 106

mariesii Hemsley & Wilson, 144

maximum

sensu Thunberg, 112

mayebarae Nakai & Hara, 149

var.

obsumiense

Yamazaki, 149

meridionale Tan, 108

var. meridionale, 108

var. minor Tan, 108

var.

setistylum

Tan, 108

microphytonT^ranchet, 126

var.

trichanthum

Zhang, 126

minutiflorum Hu, 135

miyazawae

Nakai & Hara, 123

mucronatum (Blume)

G.Don,

116

var. mucronatum, 117

var. ripense (Makino) Wilson, 117

myrsinifolium Ching ex Fang & He, 135

naamkwanense Merrill, 132

var. cryptonerve Tan, 133

var. naamkwanense, 133

nagasakianum

Nakai, 150

var.

gracilescens

Nakai, 150

nakaharai Hayata, 129

nanpingense Tan, 139

noriakianum Suzuki, 125

nudipes Nakai, 150

subsp. niphophilum Yamazaki, 150

subsp. nudipes, 150

var. kirishimense Yamazaki, 151

var. lagopus (Nakai) Yamazaki, 151

var.

mayebarae

Nakai & Hara, 149

var. niphophilum, 150

var. nudipes, 150

var. tokushimense Yamazaki, 150

var. tsurugisanense Yamazaki, 151

var.

yakumontanum

[Masamune ex]

Yamazaki, 153

obtusum (Lindley) Planchon, 140

amoenum

(Lindley) Wilson, 140

vex.

japonicum

Nakai) Kitamura, 122

var.

tosaense

(Makino) Kitamura, 123

oldamii Maximovicz, 110

var.

glandulosum

Hayata, 110

osuzuyamense Yamazaki, 153

ova

tosepalum

Yamamoto, 110

papyrociliare

Tan, 106

petilum Tan, 140

phoeniceum

smithii

(Sweet) Wilson, 141

piceum

Tan, 104

pinetorum Tan, 140

polyraphidoideum Tan, 137

var. montanum Tan, 141

poukhanense

Levl., 115

acutifolium

Komatzu, 121

obtusifolium

Komatsu, 121

pulchroides Chung & Fang, 110

x pulchrum Sweet, 141

purpureum

Komatzu, 121

200

EDINB.

J. BOT. 47(2)

qianyangense He, 132

randaiense

Hayata, 125

reticulatum D.Don, 148

var.

bifolium

Yamazaki, 148

var.

lagopus

(Nakai) Yamazaki, 151

var.

nudipes

(Makino) Hatusima, ISO

var.

parvifolium

Yamazaki, 148

var.

wadanum

(Makino) Hatusima, 146

rhodanthum He, 141

rhombicum

Miquel, 148

var.

albiflorum

Makino, 148

rhuyuenense Chun, 99

ripaecola

Tan,

133

ripense

Makino, 117

rivulare Hand.-Mazz., 102

rosmarinifolium

(Burmann) Dippel, 117

rubropilosum Hayata, 125

rufescens

Tan, 103

rufohirtum Hand.-Mazz, 101

rufulum Tan, 103

saisiuense Nakai, 123

sakawanum

Makino, 148

sanctum Nakai, 151

sasakii

Wilson,

124

sataense

Nakai, 122

saxatile Ding

Y.Y.Fang, 142

saxicolum Sleumer, 130

scabrum

G.Don,

112

linearisepalum

Sugimoto, 113

subsp. scabrum, 112

subsp. amanoi (Ohwi) Chamberlain &

Rae,

113

var.

kaempferi

(Planchon) Nakai, 120

seniavinii Maximovicz, 131

var. crassifolium Tan, 142

serpyllifolium (A.Gray) Miquel, 129

var.

albiflorum

Makino, 129

shikokianum

Makino, 151

shimidzuanum

[Honda

ex]

Makino, 149

shojoense

Hayata, 144

sieboldii

Miquel, 120

var.

serrulatum

Miquel, 120

sikayotaizanense Masamune, 125

simsii Planchon, 115

var. mesembrinum

[Balf.f.

& Forrest ex]

Rehder, 116

var. simsii, 115

var.

yakuinsulare

(Masamune) Yamazaki,

113

spadiceum

Tan, 103

sparsifolium Fang, 142

spinigerum

Levl., 107

subcerinum Tan, 107

subenerve Tan, 127

var.

nudistylum

Tan, 137

subflumineum Tan, 109

sublanceolatum

Miquel, 113

sublateritium

Komatzu, 113

subsessile Rendle, 127

surugaense

[Sugimoto

ex]

Kurata, 123

taipaoense Wu & Tan, 103

taiwanalpinum Ohwi, 111

tamurai

(Makino) Masamune, 118

tanakae

(Maximovicz) Ohwi, 138

tanakai

Hayata, 138

tashiroi Maximovicz, 111

tawadae

(Ohwi) Ohwi, 118

tec

turn

Koidzumi, 121

var.

purpureum

(Komatzu) Hara, 121

tenue

[Ching

ex]

Fang

He, 128

tenuilaminare Tan, 105

tetramerum

(Makino) Nakai, 130

thunbergii

Planchon, 140

tingwuense

Tan,

136

tosaense Makino, 123

x transiens, 121

trinerve

Franchet, 130

tschonoskyi Maximovicz, 130

var.

tetramerum

(Makino) Komatzu, 130

var. trinerve (Franchet) Makino, 130

var. tschonoskyi, 130

var.

typicum

tetramerum

Makino, 130

tsoi Merrill, 136

tsusiophyllum Sugimoto, 138

umbelliferum

Levl., 144

unciferum Tan, 135

viburnifolium

Fang, 116

viscigemmatum Tan, 134

viscistylum Nakai, 147

var.

amakusaense

Yamazaki, 152

var.

glaucum

(Hatusima) Sugimoto, 153

var.

hyugaense

Yamazaki, 153

wadanum Makino, 146

var.

lagopus

(Nakai) Hara, 151

var.

leucanthum

Makino, 146

weyrichii Maximovicz

var.

amagianum

(Makino) Hatusima, 152

var.

sanctum

(Nakai) Hatusima, 152

xiushanense

Fang, 107

yakuinsulare

Masamune, 113

yakumontanum (Yamazaki) Yamazaki, 153

yangmingshanense Tan, 132

yaoshanicum Fang & He, 100

yedoense Maximovicz, 114

var.

hallaisanense

Levl., 115

var. poukhanense (Levl.) Nakai, 115

var. yedoense, 114

Tsusiophyllum

Maximovicz, 94

tanakae

Maximovicz, 138

Azalea

Chapter

Jul 2018

Belgian pot azaleas are presumed to have been created from a relatively narrow genetic basis of collector’s material introduced into botanical gardens and private collections from Eastern Asia. Both Japanese and Chinese traditional varieties, some of them with a cultivation history of more than 400 years, were at the basis. The history of Belgian pot azalea started about 200 or more years ago; the first Belgium-bred and commercially released cultivar ‘Madame Van der Cruyssen’ was introduced in 1867. Historical research supported by phylogenetic and molecular marker studies revealed a genetic continuum must be accepted which spans many species of the Tsutsusi subgenus. This continuum has been exploited in the past by both Asian and European breeders and still proves to be a good source for genetic variation and interesting forms. Until today, major improvements have been obtained by conventional crossbreeding and selection of spontaneous bud sports. Some of the historically major breakthroughs in breeding of pot azalea are (1) cultivars that could easily grow on their own roots, eliminating the need for grafting; (2) early (fall) flowering cultivars, particularly ‘Hellmut Vogel’; and (3) longer shelf life. Breeding goals have traditionally been driven by mass production aims and consumer wishes. From small to large double flowers and from colored to white flowers, the consumers are always in for something new, and their desires can change very quickly. Today, flower characteristics are still the most important criteria for selection. In addition, leaf shape and color, shininess of leaf surface, presence or absence of hairs, growth vigor, plant architecture, earliness of flowering, and postproduction quality (longevity of flowering, absence of brown bud scales) are other important traits for breeding. More recently, breeding for biotic resistance gained attention. Especially resistance against some fungal diseases has become a major selection criterion. Furthermore, candidate cultivars in an early stage are already being tested under commercial growing conditions to evaluate their reaction to specific culture practices as pinching, application of plant growth regulators, and reaction time during forcing.

Freezing stress damage and growth viability in Vaccinium macrocarpon Ait. bud structures

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May 2021

After a freezing event, it can be challenging to extrapolate levels of freezing damage to plant growth viability based on the presence or absence of symptoms in specific bud tissues. This study investigated the relationship between freezing damage in terminal buds during ecodormancy and their viability during the subsequent growing season. We identified the bud structure that best explained this relationship, and developed a model to explain the changes in bud cold hardiness. Vertical shoots (uprights) of Vaccinium macrocarpon Ait. were sampled in central Wisconsin during Spring of 2018 and 2019. Sets of uprights with terminal buds were subjected to controlled freezing tests, followed by either visual freeze damage evaluation or assessment of shoot viability by growth assays. We determined the Browning Lethal‐Temperature50 (BLT50), as temperature for 50% damage (tissue browning) at each bud structure, and Growth Lethal‐Temperature50 (GLT50) temperature where 50% reduction in growth viability ocurred. Two models were constructed to explain: 1) bud structure damage and growth viability, and 2) GLT50’s seasonal changes, representing the cold hardiness variations, and environmental factors. The correlation between the BLT50 and GLT50 values were closest for the bud scales and bud axis, indicating the better correspondance between levels of freezing damage with the impact on the growth potential. In addition, the latter was also the most suitable candidate for modeling due to easier damage evaluation. The freezing stress damage of the bud axis explained comparitvely best the resuting growth viability. Seasonal changes in GLT50 were best explained by temperature indices based on daily minimum and on maximum temperatures over ten‐day periods. However, among the model components, daily maximum temperatures had the greatest influence on V. macrocarpon cold hardiness changes during ecodormancy.

The Value of Living Collection Catalogues and Catalogues Produced From the Royal Botanic Garden Edinburgh

Article

Full-text available

Oct 2008

David Rae

Many botanic gardens produce catalogues of plants growing in their gardens on either a regular or ad hoc basis. These catalogues are useful for reference and archive purposes and their production has added benefits such as the necessity to stocktake the collection and clarify nomenclature prior to publication. Many now also contain interesting introductory material such as collection statistics, histories of the gardens and information about significant plants in the collection. This paper describes the value of producing catalogues, reviews four diverse approaches to catalogues (from the Arnold Arboretum, Ness Botanic Gardens, Oxford Botanic Garden and Utrecht Botanic Garden) and then describes the catalogues produced by the Royal Botanic Garden Edinburgh, before culminating in a description of Edinburgh’s 2006 Catalogue.

Morpho-anatomical characterization of Rhododendron subsessile Rendle, an endangered species of the Cordillera Central Range, Philippines

Article

Jan 2020

Conservation of endangered plant species requires a prerequisite basic knowledge of their taxonomy and ecology. Unfortunately in the Cordillera Central Range, several species have not been studied, even though this area harbors a unique type of vegetation not found in other parts of the Philippines. This study documents the morpho-anatomical characteristics of Rhododendron subsessile Rendle, one of the unique and endangered flora in the area. The species exhibits a morphology typical of plants in high elevations, being a hardy shrub with small tough leaves, and showy pink flowers that rival those of commercial rhododendron species. New findings on the species morphology include a variable number of corolla lobes, stamens and a description of its fruits and seeds. The anatomical features of the species are reported here for the first time. The plant exhibits a typical dicot anatomy with dorsiventral leaves, woody stem and root system with the usual arrangement of periderm followed by secondary phloem, vascular cambium, secondary xylem with vessel elements and pith (in the case of the stem). A unique characteristic was identified as the biseriate upper epidermis of the leaf. Documenting the morphological and anatomical features of the species should prove valuable as input baseline information in formulating measures for its conservation.

Comparative Physiology of Natural Deacclimation in Ten Azalea Cultivars

Article

Full-text available

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Seasonal deacclimation was investigated during Jan. to Mar. 2014 in leaves of 10 azalea cultivars (Rhododendron section Tsutsusi) under natural conditions in eastern China. Based on the midwinter leaf freezing tolerance (LFT), these cultivars were grouped as “more-hardy” vs. “less-hardy.” Eight of the 10 cultivars first showed deacclimation when daily mean temperature over 2-week period preceding the LFT measurement was ≈9.5°C. Deacclimation for other two cultivars was somewhat delayed and might have involved deacclimation–reacclimation cycling before eventual deacclimation. Our data indicate that the “more-hardy” group deacclimated slower than the “less-hardy” ones over the first half of the deacclimation period. This trend reversed during the second half of the deacclimation period. Accordingly, “more-hardy” and “less-hardy” cultivars depicted a “curvilinear” and “reverse curvilinear/linear” deacclimation kinetics. “More-hardy” cultivars generally had higher total soluble sugars (TSS) than “less-hardy” ones at acclimated state. TSS declined during deacclimation in all cultivars, and the loss was positively correlated with the loss in LFT. Leaf starch content generally followed opposite trend to that of TSS, i.e., it was at lowest during acclimated state and increased during deacclimation. © 2017, American Society for Horticultural Science. All rights reserved.

De novo assembly of transcriptome from Rhododendron latoucheae Franch. using Illumina sequencing and development of new EST-SSR markers for genetic diversity analysis in Rhododendron

Article

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TREE GENET GENOMES

Rhododendron is universally known for its showy flower, and Rhododendron latoucheae Franch. is an adaptable and wide altitude range species of Rhododendron, with beautiful fragrant flowers and medicinal functions. However, genetic studies of Rhododendron have been hindered by limited genomic resources and genetic markers. In this study, a large dataset composed of 80,660 unigenes derived from the R. latoucheae transcriptome was assembled. Among these unigenes, 34,867 unigenes (43.22%) were annotated against public protein databases. In addition, a total of 14,415 EST-SSRs were identified from 16,019 unigene sequences with an average of one SSR per 2.87 kb. Di-nucleotide SSRs were the most abundant motif (80.03%), followed by tri- (18.82%), tetra- (0.91%), penta- (0.13%), and hexa-nucleotide (0.11%) repeats. Further, 200 primer pairs with more than six tandem repeats were selected, out of which 58 primer pairs amplified successfully and revealed polymorphism among six Rhododendron species. Among these 58 primer pairs, 37 primer pairs were polymorphic in 37 Rhododendron species and 30 R. latoucheae individuals from two national Chinese populations. A total of 382 alleles were identified, with an average of 10.3 alleles per locus. The phylogenetic tree, genetic structure analysis, and principal coordinate analysis demonstrated that major clusters corresponded to known phylogenetic trees and geographic distribution. These transcriptome data will facilitate gene discovery and functional genomic studies in Rhododendron, and the newly developed EST-SSR markers can be applied across multiple Rhododendron species and used for the evaluation of genetic relationships in Rhododendron.

Genetic Diversity of Rhododendron ripense Makino and Development of Related Cultivars Based on Microsatellite Analysis

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Full-text available

Apr 2024

In Japan, wild evergreen azalea species with high ornamental value, such as Rhododendron ripense, grow naturally, and numerous cultivars have been developed based on these species. In this study, we utilized microsatellite markers to examine the genetic relationships among wild evergreen azalea species in Japan, particularly focusing on R. ripense, as well as assessing the genetic diversity of R. ripense. STRUCTURE analysis revealed that when K = 2, R. ripense appeared to be distinct from other species. However, when K = 4, the R. ripense population exhibited two separate clusters. Further analysis at K = 10 revealed genetic diversity within the R. ripense population, which was divided into five clusters reflecting their respective geographic distributions. Analysis of cultivars related to R. ripense based on the results of wild species suggested that most of the Ryūkyū-tsutsuji (R. × mucronatum) cultivars originated from the Yamakuni River in the northern Kyushu region or the San’in region of R. ripense.

Contribution of the Rhododendron ripense Makino Chloroplast Genome to the Development of Evergreen Azalea Cultivars

Article

Full-text available

Jan 2021

Evergreen azalea is one of the most important ornamental shrubs and pot plants in temperate zones worldwide. In Japan, hundreds of azalea cultivars have been bred based on the genetic diversity of wild species and various accumulated mutants since the middle of the 17th century. Japanese cultivar groups such as Edo-kirishima, Kurume-tsutsuji, Ryūkyū-tsutsuji, Hirado-tsutsuji, and Satsuki have been developed by selection and crossing, and many cultivars have been exported to Western countries and utilized as breeding materials for pot and garden azalea. Rhododendron ripense Makino, which grows on riverside rocks and is endemic to Japan, is one of the best ornamental species because of its high adaptability to environmental conditions. We have focused on the genetic contribution of this wild species to evergreen azalea cultivars, and developed a PCR-RFLP identification marker of R. ripense cpDNA based on a species-specific sequence of the trn L-F region. The R. ripense cpDNA specific marker has been in Japanese large-flowered groups, all Ryūkyū and Ōkirishima cultivars, and half of all Hirado cultivars have the R. ripense cpDNA type. Most Japanese small flower cultivars, such as Edo-kirishima, Kurume and Satsuki have non-R. ripense type cpDNA. Italian large-flowered cultivars also tend to be the R. ripense cpDNA type. Furthermore, all pot azalea cultivars of the Indian and Simsii groups possess R. ripense type cpDNA. These results clarified the cytoplasmic contribution of R. ripense not only to Japanese large flower cultivars, but also to Western azalea cultivars. Although R. simsii has been considered to be the main ancestral species of pot azalea, R. ripense should be recognized as the cytoplasmic parent of these cultivars. The ornamental value and adaptive environmental trait originating from R. ripense should be reviewed to elucidate the development history of evergreen azalea cultivars.

Contrasting diversification history between insular and continental species of three-leaved azaleas ( Rhododendron sect. Brachycalyx ) in East Asia

Article

Full-text available

Feb 2017
J BIOGEOGR

Aim To reconstruct the diversification history of Rhododendron sect. Brachycalyx (Ericaceae), and to elucidate the differences in evolutionary history between 18 insular and two continental species. Location Islands of Japan, South Korea and Taiwan and the mainland of China in East Asia. Methods Sequences of seven non‐coding chloroplast DNA regions (3971 bp) were obtained from 74 populations covering all 20 species in Rhododendron sect. Brachycalyx . The diversification history of the section was estimated by phylogenetic analysis and molecular dating. Genetic diversity estimates within species and species groups (continental and insular species) were calculated. Differences in patterns of genetic structure within each species group were estimated by analysis of the spatial genetic structure. Results The section was monophyletic and started to diversify in the late Miocene or Pliocene. We detected 61 haplotypes in the section, of which 44 were observed in the insular species and 17 in the continental species. The two species groups were almost monophyletic. Genetic diversity across species was higher for the group of insular species than for the group of continental species, corresponding to the difference in species richness. In contrast, the insular species showed a tendency towards low genetic diversity within species and populations, whereas the continental species showed the opposite trend. Main conclusions The rapid diversification in the insular species during the Quaternary may be a result of genetic drift due to population isolation and population decline on the islands. In contrast, widespread migration or colonization may have prevented allopatric speciation in the continental species.

Population demographic history of a temperate shrub, Rhododendron weyrichii (Ericaceae), on continental islands of Japan and South Korea

Article

Full-text available

Nov 2016

Continental islands provide opportunities for testing the effects of isolation and migration on genetic variation in plant populations. In characteristic of continental islands is that the geographic connections between these islands, which are currently distinguished by seaways, have experienced fluctuations caused by sea-level changes due to climate oscillations during the Quaternary. Plant populations on the islands have migrated between these islands via the exposed seafloors or been isolated. Here, we examined the demographic history of a temperate shrub, Rhododendron weyrichii, which is distributed in the southwestern parts of the Japanese archipelago and on an island of South Korea, using statistical phylogeographic approaches based on the DNA sequences of two chloroplast and eight nuclear loci in samples analyzed from 18 populations on eight continental islands, and palaeodistribution modeling. Time estimates for four island populations indicate that the durations of vicariance history are different between these populations, and these events have continued since the last glacial or may have predated the last glacial. The constancy or expansion of population sizes on the Japanese islands, and in contrast a bottleneck in population size on the Korean island Jeju, suggests that these islands may have provided different conditions for sustaining populations. The result of palaeodistribution modeling indicates that the longitudinal range of the species as a whole has not changed greatly since the last glacial maximum. These results indicate that exposed seafloors during the glacial period formed both effective and ineffective migration corridors. These findings may shed light on the effects of seafloor exposure on the migration of plants distributed across continental islands.

Type: Korea, in acre Pouk Han

Jan 1908
100

28b. var. poukhanense (Levl.) Nakai, Bot. Mag. (Tokyo) 4: 274, Jap. (1920). Syn.: R. poukhanense Levl., Repert. Spec. Nov. Regni Veg. 5: 100 (1908). Type: Korea, in acre Pouk Han, 3 vi 1901, Faurie s.n. (holo. E).

Jan 1929
890

R Miq

R. dilatatum Miq. var. kiyosumense (Makino) Hatusima, Sci. Rep. Yokosuka City Mus. 15: 22(1969). Syntypes: Japan, Prov. Awa, M t Kiyosunu',1929, Suszuki, n.v.; 1929, Makino, n.v. Rhododendron shimidzuanum [Honda ex] Makino, Fl. Jap. ed. 2:890(1931).

Type: Japan, Kyushyu Prov., Higo, in Mt Kurobaru, 1017m, 24 iv 1927, Mabare 2159, n.v. Syn.: R. nudipes var. mayebarae Nakai & Hara in Acta Phytotax

Jan 1935
37

R Hara
J Jap
Bot

R. mayebarae Nakai & Hara, J. Jap. Bot. 11: 825 (1935). Type: Japan, Kyushyu Prov., Higo, in Mt Kurobaru, 1017m, 24 iv 1927, Mabare 2159, n.v. Syn.: R. nudipes var. mayebarae Nakai & Hara in Acta Phytotax. Geobot. 25 (2-3): 37 (1972).

Type: Japan, Pref. Kagoshima, Aranishiyama, 800-900m

Jan 1984
209

R Mayebarae Nakai Var. Obsumiense Yamazaki
J Jap
Bot

R. mayebarae Nakai var. obsumiense Yamazaki, J. Jap. Bot. 59: 209 (1984). Type: Japan, Pref. Kagoshima, Aranishiyama, 800-900m, 21 ix 1977, Takeda (holo. TI, n.v.).

Jan 1948
78

R Makino Var

R. wadanum Makino var. lagopus (Nakai) Hara, Enum. Sperm. Jap. 1: 78 (1948);

Type: in Archipelago Gotto

Jan 1870
53

R Maxim
Rhododendr

R. weyrichii Maxim., Rhododendr. As. Orient. 26, t.2 (1870). Type: in Archipelago Gotto, Insula Sylvestri,1853, Weyrich, n.v. Syn.: R. shikokianum Makino, Bot. Mag. (Tokyo) 6: 53 (1892). Type: Japan, Tosa, Sakawa (iso. K).

Jan 1932
630

R Nakai

R. sanctum Nakai, Bot. Mag. (Tokyo) 46: 630 (1932). Syntypes: Japan, Hondo, Ise Prov., Ando (TI);

Syn.: R . viscistylum Nakai var. hyugaense Yamazaki

Jan 1984
208

R Yamazaki
J Jap
Bot

R. hyugaense (Yamazaki) Yamazaki, J. Jap. Bot. 62: 72 (1987). Syn.: R. viscistylum Nakai var. hyugaense Yamazaki, J. Jap. Bot. 59: 208 (1984). Type: Japan, Kyushyu, Pref. Miyazaki, Koyu-gun, Nishimera, Shiono, 500m, 11 ix 1978, K.Takeda 89101 (holo. TI,n.v.).

Kyushyu). c.500m. Probably allied to R. viscistylum

Japan

Japan (Kyushyu). c.500m. Probably allied to R. viscistylum.

Jan 1969
1100-1300

R Yamazaki
J Jap
Bot

R. osuzuyamense Yamazaki, J. Jap. Bot. 59: 208 (1984). Syn.: R. dilatatum Miquel var.glaucum Hatusima, Sci. Rep. Yokosuka City Mus. 15: 22 (1969). Syntypes: Prov. Hyuga, Mt Osuzu, 1100-1300m, Sako 3348, n.v.; Hatusima & Sako 31427, n.v.-basionym;

A revision of Rhododendron. IV Subgenus Tsutsusi

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