New Species and Nomenclatural Notes in Pabstiella(Orchidaceae: Pleurothallidinae) from Brazil

Abstract

Two new species, Pabstiella calimanii and Pabstiella recurviloba, are described and illustrated. One new combination, Pabstiella deltoglossa, is proposed. Eight species and one variety are proposed as synonyms. They are listed in alphabetical order: Pabstiella avenacea, P. leucosepala and Pleurothallis mathildae as synonyms of Pabstiella elegantula; Pabstiella cipoensis as a synonym of P. pristeoglossa; Pleurothallis magnicalcarata and Pabstiella mentigera as synonyms of P. calcarata; Pabstiella pterophora and Pleurothallis pterophora var. minor as synonyms of Pabstiella leucopyramis, and Pabstiella podoglossa as a synonym of P. versicolor. Lectotypes are selected for four species: Pleurothallis avenacea, P. mentigera, P. pristeoglossa and P. pterophora. An epitype is selected for Pleurothallis pristeoglossa. Illustrations and taxonomic discussions are also provided.

Full text

LANKESTERIANA 16(2): 153—185. 2016.
NEW SPECIES AND NOMENCLATURAL NOTES IN PABSTIELLA
(ORCHIDACEAE: PLEUROTHALLIDINAE) FROM BRAZIL
A. L. V. ToscAno de BriTo1,3 & cArLyLe A. Luer2
1 Marie Selby Botanical Gardens, 811 South Palm Avenue, Sarasota, FL 34236-7726, U.S.A.
2 Missouri Botanical Garden, 2345 Tower Grove Avenue, St. Louis, Missouri 63110, U.S.A.
Corresponding address: 3222 Old Oak Drive, Sarasota, FL 34239-5019, U.S.A.
3 Author for correspondence: atoscano@selby.org
ABsTrAcT: Two new species, Pabstiella calimanii and Pabstiella recurviloba, are described and illustrated.
One new combination, Pabstiella deltoglossa, is proposed. Eight species and one variety are proposed as
synonyms. They are listed in alphabetical order: Pabstiella avenacea, P. leucosepala and Pleurothallis
mathildae as synonyms of Pabstiella elegantula; Pabstiella cipoensis as a synonym of P. pristeoglossa;
Pleurothallis magnicalcarata and Pabstiella mentigera as synonyms of P. calcarata; Pabstiella pterophora
and Pleurothallis pterophora var. minor as synonyms of Pabstiella leucopyramis, and Pabstiella podoglossa
as a synonym of P. versicolor. Lectotypes are selected for four species: Pleurothallis avenacea, P. mentigera,
P. pristeoglossa and P. pterophora. An epitype is selected for Pleurothallis pristeoglossa. Illustrations and
taxonomic discussions are also provided.
Key words: Brazilian Atlantic forest, synonyms, typications
doi: http://dx.doi.org/10.15517//lank.v16i2.25997
Introduction. The genus Pabstiella Brieger & Senghas
comprises about one hundred of mostly South American
species, the majority restricted to the Atlantic forests of
south-eastern Brazil. Molecular data (Chiron, Guiard
& van den Berg, 2012; Karremans, Bakker, Pupulin,
Solano-Gómez & Smulders, 2013) have demonstrated
that the genus as circumscribed by Pridgeon and
Chase (2001), Barros (2002), Pridgeon (2005), and
Luer (2006), containing not more than six species,
does not stand. These data have also shown that many
species formerly classied in Pleurothallis R.Br. and
Specklinia Lindl. and then transferred to Stelis Sw. by
Pridgeon and Chase (2001) are in fact better included
in Pabstiella. This corroborates with the expanded
morphologically based circumscription of Pabstiella
by Luer (2007). Recently, Chiron and van den Berg
(2013) proposed to conserve the name Pabstiella
against Phloeophila Hoehne & Schltr. arguing that
molecular data place the type of Phloeophila, P.
paulensis Hoehne & Schltr. [= P. nummularia (Rchb.
f.) Garay], within the genus Pabstiella, and this would
prevent transfer of all Pabstiella names to Phloeophila.
The proposal to conserve Pabstiella was, however,
not recommended by the Nomenclature Committee
for Vascular Plants (Applequist 2013). Fortunately, a
transfer of all Pabstiella species to Phloeophila has
not been proposed as this would have been not only
premature and based on mistaken results, but it would
not have contributed in any way to the understanding of
this orchid group. A recent as yet unpublished analysis
of nrITS data of the Pleurothallidinae (Toscano de
Brito & Smidt, unpubl. data) shows that Phloeophila
nummularia is not embedded within Pabstiella. While
the present paper was being reviewed, an article
was published (Chiron et al. 2016) conrming that
Phloeophila and Pabstiella are apparently not related
and that the molecular information obtained by Chiron
and van den Berg (2013) was based on misidentied
material. We feel that authors should refrain from
proposing massive nomenclatural changes based
on only one DNA fragment, until a much broader
sampling of the Pleurothallidinae is undertaken, and
until morphological analyses coupled with analyses of
additional DNA regions are carried out.
The World Checklist of Selected Plant Families
(WCSP, accessed in January 2016) published online
by the Royal Botanical Gardens, Kew, lists 79
accepted names, while 107 names are accepted in
Received 15 March 2016; accepted for publication 17 August 2016. First published online: 23 August 2016.
Licensed under a Creative Commons Attribution-NonCommercial-No Derivs 3.0 Costa Rica License.

LANKESTERIANA 16(2). 2016. © Universidad de Costa Rica, 2016.
154 LANKESTERIANA
Lista de Espécies da Flora do Brasil (Barros, Vinhos,
Rodrigues, Barberena, Fraga, Pessoa, Forster, Menini
Neto, Furtado, Nardy, Azevedo & Guimarães, 2016).
After studying protologues and available type
specimens of almost all Pabstiella species and their
synonyms, it has become clear that several names
have been consistently misidentied and confused
in herbaria and literature. As currently accepted
by the authors of the present article, Pabstiella
consists of about 100 species (several new and as
yet unpublished) distributed mainly in southern
Brazil. This gure approaches that of Barros et al.
(2016) for the Brazilian ora. A few species have
wider distribution, occurring in Bolivia, Amazonian
Brazil, Colombia, Ecuador, Peru and Venezuela, with
two species reaching Panama and Costa Rica (Luer,
2006). In this article we describe and illustrate two
new species of Pabstiella from Brazil and propose
one new combination and nine new synonyms.
Illustrations, updated synonym lists, taxonomic
discussions and typications are provided for several
species.
New species
Pabstiella calimanii Toscano & Luer, sp. nov.
TYPE: Brazil. Minas Gerais: Jacinto, collected and
cultivated by Sávio Caliman, . cult. 6 June 2010, A.
Toscano de Brito 3073 (holotype: MBM [306681];
isotype UPCB), C. Luer illustr. 21902. Fig. 1–2.
This species is similar to Pabstiella cordilabia
(Pabst) Luer, but differs by the distinctly long-petiolate,
convex, broader leaves; minutely pubescent sepals; and
the narrower, obscurely trilobed, oblong lip.
Plant medium in size, ca. 10.0 cm tall, epiphytic,
caespitose; roots slender. Ramicauls erect 2.5–4.0
cm long, enclosed by a tubular, red-brown sheath
from near the base to the middle and another sheath
near the base. Leaf erect, rigid, coriaceous, broadly
spathulate-elliptical, convex, 5.0–5.5 cm long with
the petiole 1.5–2.0 cm long, 2.2–2.7 cm wide, obtuse
to acute at the minutely 3-denticulate apex, distinctly
cuneate below into a channeled, occasionally
slightly twisted petiole. Inorescence 1–2 sublax,
successively, several-owered racemes with ca. 4
owers, usually shorter or barely surpassing the
leaf, usually with two simultaneously open owers,
3.0–4.0 cm long including the peduncle 2.0–2.5 cm
long, borne laterally from the ramicaul below the
abscission layer with a thin spathe 2.0 mm long;
oral bracts 2.0–3.0 mm long; pedicels 4.0–5.0
mm long; ovary 2.0 mm long; sepals dull yellow to
yellow-orange, densely spotted and suffused with
red-purple, glabrous externally, minutely pubescent
internally, the dorsal sepal oblong-obovate, obtuse,
carinate externally along the mid-vein, the basal
two thirds concave, the apical third convex and
slightly recurved, 7.0–7.5 mm long, 2.8–3.0 mm
wide, 3-veined, the lateral sepals connate to near the
apex into an oblong, concave, externally bicarinate,
shortly bid synsepal with acute, minutely apiculate
tips, 6.5–7.0 mm long, 3.5–4.0 mm wide expanded,
incompletely 6–7-veined; petals densely spotted with
red-purple over a dull greenish-yellow background,
obliquely obovate, narrowed below, minutely
verrucose externally, glabrous, obtuse, 3.5 mm long,
1.75–2.0 mm wide, incompletely 2-veined; lip yellow,
spotted with red-purple, papillar-verrucose, oblong-
trilobed, 4.0 mm long, 1.0 mm wide unexpanded, the
apical third slightly convex, oblong-ovate, obtuse,
the lateral lobes below the middle, obscure, erect,
low, rounded, the disc with a pair of parallel, erect,
submarginal, longitudinal calli, broadly channeled
between the calli, the base truncate, with an indistinct
lobule at each corner, hinged to the column-foot;
column yellow, edged in red-purple, slender, semi-
terete, tridentade with denticulate margins at apex,
3.0–3.5 mm long, the anther, rostellum, and stigma
ventral, the foot thick and shallowly concave, 1 mm
long.
DistributioN: So far, this species is only known for
the municipality of Jacinto, state of Minas Gerais,
southeastern Brazil.
etymology: The specic epithet honors Sávio Caliman
from Venda Nova do Imigrante, Espírito Santo, Brazil,
who collected and cultivated this species.
Pabstiella calimanii resembles P. cordilabia
(Fig. 3) in oral color and shape of oral segments,
especially sepals and petals. However, Pabstiella
calimanii is distinguished by cuneate-petiolate,

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ToscAno de BriTo and Luer — New species and nomenclatural notes in Pabstiella 155
Figure 1. Pabstiella calimanii. A - Habit; B - Apical portion of inorescence with a ower, side view; C - Dorsal sepal;
D - Synsepal; E–F - Petals; G–H - Lip; I - Ovary, column and lip, side view. Drawn by C.A. Luer based on the isotype
(A. Toscano de Brito 3073, UPCB).
convex, broader elliptical leaves, minutely pubescent
sepals, and a narrower, obscurely trilobed, oblong lip,
instead of much narrower and at leaves, glabrous or
only microscopically papillose sepals, and a lip with
distinct, erect, broadly rounded, lateral lobes, which,
when expanded, render a cordate outline.

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156 LANKESTERIANA
Figure 2. Pabstiella calimanii. A - Portion of ramicaul, leaf and inorescence; B - Apical portion of inorescence; C -
Flower, side view; D - Flower, ¾ view. Based on a clone of the holotype (A. Toscano de Brito 3073). Photograph by W.
Collier & A. Toscano de Brito.
5 mm
5 mm
1 cm
A
B
C D

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ToscAno de BriTo and Luer — New species and nomenclatural notes in Pabstiella 157
Figure 3. Pabstiella cordilabia. A - Habit; B - Apical portion of inorescence with ower in side view; C - Flower, front
view. Based on A. Toscano de Brito 3484 (UPCB). Photograph by W. Collier & A. Toscano de Brito.
2 cm
5 mm 5 mm
A
BC

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158 LANKESTERIANA
Pabstiella recurviloba Toscano & Luer, spec. nov.
TYPE: Brazil. Paraná: São José dos Pinhais, Represa
do Vossoroca, ca. 800 m, collected 21 July 2010, .
cult. 2 Nov. 2010, A. Toscano de Brito & M. Klingelfus
3331 (holotype: MBM [334253]). C. Luer Illustr.
21904. Fig. 4–5.
This species is similar to Pabstiella verboonenii
Luer & Toscano, from which it differs by its narrower,
linear-ensiform petals and the distinctly trilobed lip.
Plant small, up to ca. 4.5 cm tall excluding the
inorescence, epiphytic, densely caespitose, roots
slender. Ramicauls slender, erect, 15.0–35.0 mm long,
enclosed by 2–3 closely appressed, microscopically
pubescent, tubular sheaths with minutely scabrous,
thickened and dilated ostia. Leaf green, densely
speckled with purple, coriaceous, broadly elliptical,
obtuse to subacute, minutely apiculate, 7.0–13.0 mm
long including a petiole 1.0–4.0 mm long, 5.0–7.0
mm wide, broadly cuneate below into the petiole.
Inorescence a loose, exuous, successively several-
owered raceme of up to ca. 18 owers, up to 8.5 cm
long including the peduncle 3.0–4.0 cm long, from
near the apex of the ramicaul; oral bracts 1.2–1.5
mm long; pedicels 1.5–2.5 mm long; ovary 1.0–1.5
mm long; owers resupinate or non-resupinate; sepals
glabrous, the dorsal sepal dark purple, the apical third
greenish, narrowly ovate-elliptical, 5.0 mm long, 1.0
mm wide, 3-veined, with the apex deeply cucullate,
obtuse, the lateral sepals dark purple, connate to near
the apex into an oblong-obovate, cymbiform, shortly
bid lamina with acute tips, 4.0 mm long, 3.0 mm
wide unexpanded, 6-veined; petals dark purple, entire,
linear-ensiform, acute, 2.0–2.2 mm long, 0.5–0.7
mm wide, 1-veined; lip dark purple, oblong-trilobed,
2.2 mm long, 0.7 mm across unexpanded, shallowly
concave between the lateral lobes, the middle lobe
broadly ovate, convex, eshy, with the apex rounded,
the lateral lobes near the middle, obliquely triangular,
erect, recurved, slightly incurved, obtuse, 0.6 mm long,
0.5 mm wide, the disc with a pair of oblique calli from
the bases of the lateral lobes, the basal third unguiculate,
curved, slightly convex, minutely pappilose, the base
truncate, hinged to the column-foot; column slender,
cylindrical, toothed at apex, 2.0 mm long, the anther,
rostellum, and stigma ventral, the foot slender, 0.5 mm
long.
AddiTionAL mATeriAL exAmined: Brazil. Rio Grande do
Sul. São Francisco de Paula, Canyon do Josafá, 950 m,
collected and cultivated by J. Klein and L.F. Varella 227,
. cult. 27 Nov. 2014, A. Toscano de Brito 3323 (UPCB).
disTriBuTion: So far, this species is only known for the
states of Paraná and Rio Grande do Sul, southern Brazil.
eTymoLogy: From the Latin recurvilobus (= recurved
lobe), in reference to the recurved, lateral lobes of the
lip.
Pabstiella recurviloba is similar to Pabstiella
verboonenii in habit, inorescence, and oral
morphology. They share similar delicate ramicauls,
which are covered with pseudo-lepanthiform sheaths.
They also have similarly purple-speckled, small,
elliptical leaves, and owers produced successively in
a loose, exuous, long-pedunculated raceme, which
usually exceeds the leaf severalfold. Sepal morphology
is also similar in both species, i.e., the lateral sepals
are connate into a cymbiform, shortly bid apex, and
the apex of the dorsal sepal is characteristically hollow
and thimble-like resembling the apex of the dorsal
sepals of two species in the genus Specklinia Lindl.,
namely S. digitalis (Luer) Pridgeon & M.W.Chase
and S. segregatifolia (Ames & C. Schweinf.) Solano
& Soto Arenas. Nonetheless, P. recurviloba is readily
distinguished from all these species by its narrower,
linear-ensiform petals and the distinctly trilobed lip
whose obliquely triangular, erect, recurved lateral lobes
each resemble the dorsal n of a shark in side view.
Pabstiella calcarata (Cogn.) Luer, Monogr. Syst. Bot.
Missouri Bot. Gard. 112: 119. 2007. Fig. 6–9.
Basyonym: Pleurothallis calcarata Cogn., Bull. Soc.
Roy. Bot. Belgique 43: 311. 1906 (publ. 1907).
TYPE: BRAZIL. Rio de Janeiro: without locality,
A. Glaziou s.n. (Holotype: BR [658570]).
Synonyms: Specklinia calcarata (Cogn.) Luer,
Monogr. Syst. Bot. Missouri Bot. Gard. 95: 259.
2004.
Pleurothallis mentigera Kraenzl., Kongl. Svenska
Vetensk. Acad. Handl., n.s., 46(10): 50. 1911, syn.
nov. TYPE: BRAZIL. Paraná: Roça Nova, Banhado,
30 December 1908, P. Dusén 7433 (holotype: B
[destroyed]; lectotype here designated: S [S-R-
4966, photo seen]; isolectotypes: AMES [118455],
HBG [501892, photo seen]).

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ToscAno de BriTo and Luer — New species and nomenclatural notes in Pabstiella 159
Figure 4. Pabstiella recurviloba. A - Habit; B – Portion of inorescence with ower in side view; C - Dorsal sepal; D -
Synsepal; E–F - Petals; G–H - Lip; I - Portion of ovary, column and lip, side view. Drawn by C. A. Luer based on the
holotype (A. Toscano de Brito & M. Klingelfus 3331, MBM).
Pleurothallis magnicalcarata Loefgr., Arch. Jard.
Bot. Rio de Janeiro 2: 51. 1918, syn. nov. TYPE:
BRAZIL. São Paulo: Guaratinguetá, 1916, P.
Campos Porto s.n. (holotype: RB [8285]; isotype:
AMES [16292]).
Specklinia mentigera (Kraenzl.) F.Barros &
Barbarena, Rodriguésia 61(1): 130. 2010, syn. nov.
Pabstiella mentigera (Kraenzl.) L.Kollmann,
Candollea 65: 96. 2010, syn. nov.
Pleurothallis calcarata Cogn. [= Pabstiella
calcarata (Cogn.) Luer] was described based on a
specimen collected by Auguste Glaziou (1828–1906)
in Rio de Janeiro. The protologue of P. calcarata

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160 LANKESTERIANA
Figure 5. Pabstiella recurviloba. A - Habit; B - Basal portion of ramicauls showing rhizome and pseudo-lepanthiform
sheath; C - Apical portion of a successively several-owered raceme; D - Portion of inorescence with ower in side
view. Based on a clone of the holotype specimen (A. Toscano de Brito & M. Klingelfus 3331). Photograph by W. Collier
& A. Toscano de Brito.
A
B
C
D
5 mm
5 mm
5 mm
1 cm

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ToscAno de BriTo and Luer — New species and nomenclatural notes in Pabstiella 161
Figure 6. Pabstiella calcarata. Holotype of Pleurothallis calcarata Cogn. deposited at BR. Reproduced with permission.
Copyright: Jardin Botanique Meise.

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162 LANKESTERIANA
Figure 7. Pabstiella calcarata. Lectotype of Pleurothallis mentigera, here designated: P. Dusén 7433 (S-R-4966). By
permission of the Keeper, Herbarium of the Swedish Museum of Natural History.

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ToscAno de BriTo and Luer — New species and nomenclatural notes in Pabstiella 163
contains a detailed description, but lacks an illustration.
The lateral sepals were described as forming a spread
calcar and the lip as sessile. The holotype deposited
at BR (Fig. 6) contains two small specimens kept in
an envelope, of which only one is fertile and carries
a sole ower. To prevent damage to the more than a
century old and only ower left, we did not dissect it.
Glued on the upper right side of the sheet, a sketch,
presumably prepared by Cogniaux, shows dissected
oral parts and a ower in side view. The drawing
clearly depicts a spurred ower and a sessile lip just as
Cogniaux described. The lip on this sketch is a perfect
match to the lip kept in a smaller envelope located
at the lower, right portion of the herbarium sheet. A
closer examination of this lip, however, reveals that
it is apparently damaged at base and might most
certainly have had a distinctive claw similar to the
one found on the lip of Pleurothallis magnicalcarata
Loefgr. and Pleurothallis mentigera Kraenzl. The lip
claw on the type of Pleurothallis calcarata might have
been damaged prior to Cogniaux’s study, which would
explain his description and illustration of a “sessile”
lip of P. calcarata. The rest of the lip, however, agrees
in every detail with lips from owers of collections of
P. mentigera and P. magnicalcarata, including their
type specimens and the descriptions in the protologues.
Habit, inorescence, and the other oral segments are
also a good match. Therefore, we conclude that these
taxa are all conspecic. Pleurothallis mentigera and P.
magnicalcarata are for this reason here placed in the
synonym of Pabstiella calcarata. The type specimen
of P. calcarata at BR bears number “101 bis,” but this
number is not cited in the protologue.
The holotype of Pleurothallis mentigera Kraenzl.
was most probably deposited at B and was destroyed
during World War II (Christenson 1994). Isotypes exist
at S, AMES and HBG. The specimen at S (Fig. 7) has
been here selected as lectotype.
Pabstiella calcarata is distinguished by a deep
spur that is exceeded by the spur of four other species:
Pabstiella conspersa (Hoehne) Luer, P. mirabilis
(Schltr.) Brieger & Senghas, Pabstiella rupicola
Figure 8. Pabstiella calcarata. A - Habit; B – Flower, ¾ view. Based on A. Toscano de Brito 3470 (UPCB). Photograph by
W. Collier & A. Toscano de Brito.
B
A

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164 LANKESTERIANA
Figure 9. Pabstiella calcarata. A–B - Habit; C - Flower, side view; D - Flower, ¾ view. A - based on A. Toscano de Brito
3553 (UPCB); B–D - based on A. Toscano de Brito 3351 (UPCB).
CD
AB
1 cm
2 mm
5 mm

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ToscAno de BriTo and Luer — New species and nomenclatural notes in Pabstiella 165
L. Kollmann, and P. syringodes (Luer) F. Barros.
Flower color varies from green, cream, yellow, dull
orange to brownish. Figures 8 and 9 illustrate habit,
inorescence, oral color and size variation of this
species. Figure 8 was based on a cultivated specimen
from the state of Rio de Janeiro (A. Toscano de Brito
3470, UPCB) and Figure 9 illustrates two cultivated
specimens from the state of Paraná (A. Toscano de
Brito 3552 and A. Toscano de Brito 3553, UPCB).
AddiTionAL mATeriAL exAmined: Brazil. Minas Gerais:
Itamonte, Parque Nacional do Itatiaia, 1820 m, 25
Jan. 2009, F. Barbarena 131(RB). Paraná: Piraquara,
collected by M. Klingelfus s.n., . cult. 11 July 2016,
A. Toscano de Brito 3553 (UPCB); Rio Branco do Sul,
Serra do Bromado, 9 Feb. 1982, G. Hatschbach 44555
(MBM); São José dos Pinhais, Vossoroca, collected by
M. Klingelfus s.n., . cult. 11 July 2016, A. Toscano
de Brito 3552 (UPCB). Rio de Janeiro: Petrópolis,
Estrada do Imperador, colleceted by M. Scalia Baltar
s.n., . cult. 18 Nov. 2015, A. Toscano de Brito 3470
(UPCB); Near Petrópolis, alt. ca. 1000 m, cultivated at
Orquidário Binot by Jorge and Maurício Verboonen,
30 November 1989, C. Luer 14519 (SEL). São Paulo:
Bananal, Sertão do Rio Vermelho, Serra da Bocaina, 20
May 1936, A.C. Brade 15259 (RB); Campos do Jordão,
September 1937, P. Campos Porto s.n. (RB); Campos
de Jordão, Itapeva, 1800 m, Feb. 1947, G. Pabst 370
(AMES); Campos de Jordão, Itapeva, March 1947, G.
Pabst 370 (AMES, HB); Corrego Alegre, 2 Jan. 1897,
A. Loefgren ex Comissão Geográca e Geológica de
São Paulo 3590 (AMES, SP).
Pabstiella elegantula (Cogn.) Luer, Monogr. Syst.
Bot. Missouri Bot. Gard. 112: 119. 2007. Fig. 10–11.
Basionym: Pleurothallis elegantula Cogn., Bull. Soc.
Roy. Bot. Belgique 43: 308. 1906 (published
1907), not Cogn. 1909. TYPE: Brazil. Rio de
Janeiro: without locality: A. Glaziou s.n. (holotype:
BR [658530]).
Synonyms: Pleurothallis avenacea Ames, Orchidaceae
2: 266. 1908, syn. nov. TYPE: without locality:
owered in cultivation 18 May 1907, O. Ames
s.n. (lectotype here designated: AMES [7389 -
collection “III”]). SYNTYPES: without locality:
owered in cultivation, 2 March 1904, O. Ames
s.n. (AMES [6098 - collection “I”]); owered in
cultivation, 14 January1903, O. Ames s.n. (AMES
[6098 - collection “II”]); owered in cultivation
28 February1905, O. Ames s.n. (AMES [7389 -
collection “I”]); owered in cultivation 28 March
1906, O. Ames s.n. (AMES [7389 - collection
“II”]).
Pleurothallis leucosepala Loefgr., Arch. Jard. Bot.
Rio de Janeiro 2: 49. 1918, syn. nov. TYPE: Brazil.
São Paulo: Guaratinguetá, 1917, P. Campos Porto
s.n. (holotype: RB [8251]).
Pleurothallis mathildae Brade, Orquídea (Rio de
Janeiro) 6: 12 (1943), syn. nov. TYPE: Brazil. Rio
de Janeiro: Nova Friburgo, 23 November 1940,
M.S. Odebrecht s.n. (holotype: RB [46413]).
Trichosalpinx mathildae (Brade) Toscano & Luer,
Kew Bull. 48: 326 (1993), syn. nov.
Specklinia avenacea (Ames) Luer, Monogr. Syst.
Bot. Missouri Bot. Gard. 95: 259. 2004, syn. nov.
Specklinia elegantula (Cogn.) Luer, Monogr. Syst.
Bot. Missouri Bot. Gard. 95: 260. 2004, syn. nov.
Specklinia leucosepala (Loefgr.) Luer, Monogr.
Syst. Bot. Missouri Bot. Gard. 95: 261. 2004, syn.
nov.
Pabstiella avenacea (Ames) Luer, Monogr. Syst.
Bot. Missouri Bot. Gard. 112: 119. 2007, syn. nov.
Pabstiella leucosepala (Cogn.) F. Barros & C.F.
Hall, Orquidário 26(1): 29. 2012, syn. nov.
Study of the type specimens of Pleurothallis
avenacea Ames, Pleurothallis elegantula Cogn, and
Pleurothallis mathildae Brade has shown that these
taxa are all conspecic. Differences in oral size, sepal
carination, and sheaths of the ramicauls are simply
extremes within a spectrum.
Pabstiella elegantula (Cogn.) Luer was rst
described in the genus Pleurothallis R.Br. It is a
frequent species in the Atlantic forests of Rio de
Janeiro and São Paulo, in southeast Brazil. Although
uniform in the shape of oral segments, the ower
size is otherwise very variable and this might have
contributed to the list of synonymies presented here.
For example, sepal length ranging from 5 to 9 mm
long may be found throughout a continuum. The
type specimen of Pleurothallis elegantula, with
sepals about 5 mm long, represents a small owered
extreme, P. mathildae, with sepals about 7 mm long,
and P. leucosepala, with 8 mm long sepals, represent

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166 LANKESTERIANA
Figure 10. Pabstiella elegantula. Syntypes of Pleurothallis avenacea deposited at AMES. Herbarium sheet nr. 6098
contains two collections: number “I”, dated 2 March 1904, and number “II”, dated 14 January 1903. Courtesy of the
Orchid Herbarium of Oakes Ames, Harvard University Herbaria.

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ToscAno de BriTo and Luer — New species and nomenclatural notes in Pabstiella 167
Figure 11. Pabstiella elegantula. Syntypes of Pleurothallis avenacea deposited at AMES. Herbarium sheet 7389 contains
three distinct collections: collection “I”, dated 28 February 1905; collection “II”, dated 28 March 1906, and collection
“III”, dated 18 May 1907. Collection “III” has been here designated as lectotype of Pleurothallis avenacea. Courtesy of
the Orchid Herbarium of Oakes Ames, Harvard University Herbaria.

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168 LANKESTERIANA
intermediate forms, while the type specimens of P.
avenacea, with about 9 mm long sepals, are just large
owered extremes. The sheaths of the ramicauls are
also variable. Some specimens possess typical pseudo-
lepanthiform sheaths (as described by Toscano de Brito
& Luer, 2013) but in others the sheaths are apparently
glabrous with only obscurely thickened ostia.
Oakes Ames described Pleurothallis avenacea
based on a collection of unknown origin, according
to him “introduced to horticulture from Tropical
America” (Ames 1908). He cited in the protologue
two collection numbers from his herbarium, 6098 and
7389, without selecting one of them as the holotype.
These herbarium specimens are preserved at AMES.
Each herbarium sheet contains inorescences and
fertile ramicauls from distinct collections made from
cultivated plants which owered at different times.
The herbarium sheet 6098 (Fig. 10) contains two
collections numbered in Roman numerals: number “I”,
dated 2 March 1904, and number “II”, dated 14 January
1903. The herbarium sheet 7389 (Fig. 11) contains
three distinct collections; these are also numbered in
Roman numerals: collection “I” is dated 28 February
1905, collection “II” is dated 28 March 1906, and
collection “III” is dated 18 May 1907. With exception
of collection number “III” on herbarium sheet nr. 7389,
all other specimens seem to have been collected from
Ames’s orchid nursery located at his home in Boston.
Collection number “III” on herbarium sheet nr. 7389
came from his orchid nursery located in the family’s
country state that the Ameses named as Borderland,
which is located in the towns of Easton and Sharon,
in Massachusetts. The country estate remained in the
family for 65 years and is now a state Park (http://
www.mass.gov/dcr/parks/borderland/index.htm). The
illustration in the protologue of Pleurothallis avenacea
was prepared by Ames’s wife, Blanche, in 1907. It is
then safe to assume that the illustration was based on
the Borderland specimens mounted on sheet nr.7389,
which owered on 18 May 1907. This collection is also
the most representative, possessing complete fertile
specimens and many inorescences. It is therefore
chosen herein as the lectotype of Pleurothallis
avenacea.
AddiTionAL mATeriAL exAmined: Brazil. Without
locality: obtained from F. Miranda, owered in
cultivation by George Schudel at Middleburg, Florida,
25 June 1996, C. Luer 17933 (SEL). Rio de Janeiro:
Near Petrópolis, ca. 1000 m, cultivated at Orquidário
Binot by Jorge and Maurício Verboonen, 30 November
1989, C. Luer 14494 (SEL); Organ Mountains, near
Teresópolis, 2 December 1946, Hunnewell 18489A
(AMES).
Pabstiella leucopyramis (Rchb.f.) Luer, Monogr. Syst.
Bot. Missouri Bot. Gard. 112: 120. 2007. Fig. 12–15.
Basionym: Pleurothallis leucopyramis Rchb.f.,
Linnaea 41: 47. 1876. TYPE: Without locality:
owered in cultivation at Hamburg Botanical
Garden, 1874, W. Saunders 2185 (holotype: W [R-
53823]; drawings of the holotype: W [R-53821];
Isotype: K [000584222]).
Synonyms: Humboldtia leucopyramis (Rchb.f.)
Kuntze, Revis. Gen. Pl. 2: 667. 1891.
Pleurothallis pterophora Cogn., Fl. Bras. (Mart.)
3(4): 583. 1896, syn. nov. TYPE: BRAZIL. Rio de
Janeiro: Petrópolis, Retiro, Morro da Carangola,
22 December 1882, A. Glaziou 14305 (lectotype
here designated: BR [658598]; isolectotypes: K
[000940360], P [00489476], LE [LE00001425].
Rio de Janeiro: Alto Macaé, A. Glaziou
17267 (Syntype: P [00489477]; isosyntype: K
[000940363]).
Pleurothallis pterophora var. minor Cogn., Fl.
Bras. (Mart.) 3(4): 584. 1896, syn. nov. TYPE:
Brazil. Rio de Janeiro: Alto Macaé, 1892, A.
Glaziou s.n. (holotype: BR [658461]).
Trichosalpinx pterophora (Cogn.) Luer, Phytologia
54: 397. 1983, syn. nov.
Specklinia leucopyramis (Rchb.f.) Luer, Monogr.
Syst. Bot. Missouri Bot. Gard. 95: 261 (2004), syn.
nov.
Pabstiella pterophora (Cogn.) Chiron, Phytotaxa
46: 55. 2012, syn. nov.
Pleurothallis leucopyramis Rchb.f. (= Pabstiella
leucopyramis (Rchb.f.) Luer) was described by H.
G. Reichenbach from plants obtained from William
Wilson Saunders at Reigate, England, which owered
in cultivation at Hamburg Botanical Garden. Nothing
was known about its provenance, but during many
years it was thought to be Costa Rican in origin
(Reichenbach 1878; Veitch 1889). This collection
is preserved in Reichenbach herbarium at W and a
duplicate (two inorescences) is kept at K. Both K

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ToscAno de BriTo and Luer — New species and nomenclatural notes in Pabstiella 169
Figure 12. Pabstiella leucopyramis. Lectotype of Pleurothallis pterophora, here designated: A. Glaziou 14305 (BR).
Reproduced with permission. Copyright: Jardin Botanique Meise.

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170 LANKESTERIANA
Figure 13. Pabstiella leucopyramis. Isolectotype of Pleurothallis pterophora deposited at P containing detailed owering
season and provenance information. Reproduced with permission of the Muséum National d’Histoire Naturelle (Paris).

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ToscAno de BriTo and Luer — New species and nomenclatural notes in Pabstiella 171
Figure 14. Pabstiella leucopyramis. Holotype of Pleurothallis pterophora var. minor deposited at BR (A. Glaziou s.n.).
Reproduced with permission. Copyright: Jardin Botanique Meise.

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172 LANKESTERIANA
Figure 15. Pabstiella leucopyramis. A - Habit; B - Portion of inorescence with owers in side view; C - Flower, ¾ view.
Based on A. Toscano de Brito 3500 (UPCB). Photograph by W. Collier & A. Toscano de Brito.
A
BC
2 cm
3 mm
3 mm

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ToscAno de BriTo and Luer — New species and nomenclatural notes in Pabstiella 173
and W collections were studied by the authors. The
collection at W bears Saunders’s number 2185, but this
number is not cited in the protologue.
Study of the type specimens of Pleurothallis
pterophora Cogn., an endemic species in southeast
Brazil and recently transferred to Pabstiella by Chiron
(2012), has shown that this species and P. leucopyramis
are inseparable. They share the same vegetative and
oral morphology.
Cogniaux (1896) cited three syntype specimens in
the protologue of Pleurothallis pterophora, namely:
two Glaziou’s collections, 14305 and 17267, from Rio
de Janeiro, and a Schenck’s collection 1337, from Santa
Catarina. We did not locate Glaziou’s nr. 17267 at BR or
Schenck’s nr. 1337. However, duplicates of Glaziou’s
collections exist at K (14305 and 17267), P (14305 and
17267), BR (14305) and LE (14305). We here select
the specimen A. Glaziou 14305 deposited at BR (Fig.
12) as the lectotype of Pleurothallis pterophora Cogn.
Many of Glaziou’s collections are known to usually
lack precise localities. However, study of a duplicate
of this collection deposited at P (Fig. 13) provides
detailed owering season and provenance information
of the lectotype of Pleurothallis pterophora. The
collection was made in December 1882 and comes
from Morro da Carangola, in Retiro, today a district
of the city of Petrópolis, in the state of Rio de Janeiro.
The holotype of Pleurothallis pterophora var. minor
Cogn. (Fig. 14) was also examined and proved to be
just a small individual of Pabstiella leucopyramis.
Figure 15 illustrates a collection from Venda Nova do
Imigrante, state of Espírito Santo, in southeast Brazil.
Pabstiella pristeoglossa (Rchb.f. & Warm.) Luer,
Monogr. Syst. Bot. Missouri Bot. Gard. 112: 120.
2007. Fig. 16–19.
Basionym: Pleurothallis pristeoglossa Rchb.f. &
Warm., Otia Bot. Hamburg. 2(1): 92. 1881. TYPE:
Brazil. Minas Gerais: Lagoa Santa, E. Warming 75
- number not cited in the protologue - (holotype: C
[Lost]; lectotype here designated: Reichenbach’s
original drawings of a ower from the holotype,
prepared in December 1880, and deposited at W [R-
53811]; epitype here selected: Warming’s original
drawing nr. 75, partially reproduced in Warming,
Symbolae 29: 358, tab. 4. g. 3. 1883[publ. in
1884], and now deposited at C).
Synonyms: Humboldtia pristeoglossa (Rchb.f. &
Warm.) Kuntze, Revis. Gen. Pl. 2: 668. 1891.
Specklinia pristeoglossa (Rchb.f. & Warm.) Luer,
Monogr. Syst. Bot. Missouri Bot. Gard. 95: 263.
2004.
Pabstiella cipoensis L.Kollmann, Candollea 65:
98. 2010. TYPE: Brazil. Minas Gerais: Serra do
Cipó, 15 July 1998, . in cult. 30 August 2007,
L. Kollmann & R.L. Kolmann 10000 (holotype:
MBML [39764]; isotype: RB [498577]), syn.nov.
Pleurothallis pristeoglossa Rchb.f. & Warm. [=
Pabstiella pristeoglossa (Rchb.f. & Warm.) Luer] was
discovered by Eugen Warming (1841–1924) during
his expeditions to Lagoa Santa in the Brazilian state
of Minas Gerais, between 1863 and 1866. Warming
prepared detailed illustrations of the orchids he
collected and these, together with spirit specimens and
notes, were sent to Reichenbach for identication. Over
60 species were found to be new (Warming 1884) and
were published by Reichenbach (1881) in Otia Botanica
Hamburgensia. Warming co-authored all new species
he collected, except those named after him. Warming’s
original drawings and collections are preserved at C. In
Reichenbach orchid herbarium at W, the only herbarium
sheet attributed to this species is numbered 53811 and it
has been marked as “typus” by the staff at W (Fig. 16). It
contains two illustrations: An incomplete, tracing copy
of Warming’s drawings (Fig. 16A), whose originals are
preserved at C, and a sketch prepared by Reichenbach,
in December 1880, based on a spirit preserved ower
from a specimen collected by Warming 75 (Fig. 16B).
The drawing on the right side of the sheet (Fig. 16B)
bears the following note in Reichenbach’s handwriting:
“Rchb.f. ad sp. Warming alc” (= Rchb.f. ad specimen
Warmingiani alcoholi). This means that Reichenbach
made the drawing based on a Warming’s specimen
preserved in alcohol. He did not explicitly cite a collection
in the protologue, but this was the standard practice of
the time. He only cited Warming’s illustration at that
time still unpublished. It is not clear whether Warming’s
spirit collection comprised a complete specimen or only
owers. The description provided in the protologue of
Pleurothallis pristeoglossa is fairly detailed, including
information on vegetative and inorescence parts,
something that Reichenbach could not have done
studying owers alone. Warming’s spirit collection was
not located by the staff at C (H. Pedersen 2013, pers.

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174 LANKESTERIANA
Figure 16. Pabstiella pristeoglossa. Herbarium sheet at W containing two illustrations of Pleurothallis pristeoglossa: A -
Incomplete, tracing copy of Warming’s drawings whose originals are preserved at C, and B - Reichenbach’s original
drawings based on a ower from the lost holotype specimen (Warming 75), lectotype here designated. Reproduced with
permission of the Natural History Museum Vienna.

Figure 17. Pabstiella pristeoglossa. Warming’s original illustration nr. 75 deposited at C and here designated as epitype of
Pleurothallis pristeoglossa. Reproduced with permission of the Natural History Museum of Denmark.
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LANKESTERIANA 16(2). 2016. © Universidad de Costa Rica, 2016.
176 LANKESTERIANA
comm.) and might have been lost or destroyed. It is here
assumed that this collection contained a complete, fertile
specimen. However, it is also possible that Warming’s
spirit collection comprised only owers (or ower) and
Reichenbach’s description was actually based on these
owers and on Warming’s detailed, original illustration.
The unpublished drawing prepared by Reichenbach,
which is located on the right side of the herbarium sheet
and shows a oral dissection of Warming’s specimen, is
here selected as the lectotype among the extant original
materials. Warming’s original illustration number 75
(Fig. 17) deposited at C is additional, original material
that complements Reichenbach’s drawings. It depicts a
complete specimen as well as detailed oral analyses.
It provides important, morphological features for
recognition of the species and is therefore here selected
Figure 18. Pabstiella pristeoglossa. A - Habit; B – Flower, side view; C - Dorsal sepal; D - Synsepal; E–F - Petals; G–H -
Lip; I – Ovary, column and lip, side view. Drawn by C. A. Luer based on M. Borges s.n. (MBML).

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Figure 19. Pleurothallis pristeoglossa. A - Habit; B - Flower, side view; C - Flower, ¾ view. Based on A. Toscano de Brito
3525A (UPCB). Photograph by W. Collier & A. Toscano de Brito.
C
B A
5 mm
1.5 cm
3 mm

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178 LANKESTERIANA
as the epitype of Pleurothallis pristeoglossa. A portion
of this illustration appeared in Symbolae ad Floram
Brasiliae centralis cognoscendam (Warming 1884: tab.
4. g.3). Figures 18 and 19 presented herein were based
on cultivated specimens from the state of São Paulo: M.
Borges s.n. (MBML) and A. Toscano de Brito 3525A
(UPCB).
Study of the holotype of Pabstiella cipoensis
L.Kollmann, which has recently been described from
Minas Gerais, has shown that this species is conspecic
with Pabstiella pristeoglossa. Their types present
exactly the same vegetative and oral morphology.
AddiTionAL mATeriAL exAmined: Brazil. Without
collection data: owered in cultivation by the Verboonens
at Orquidário Binot, Petrópolis, 2 October1996, C.
Luer 18085 (SEL). Rio de Janeiro: Organ Mountains,
obtained from Binot in Petrópolis, June 1979, owered
in cultivation at SEL, 18 Jan. 1980, O.I.C. 3313 (SEL).
São Paulo: without locality, owered in cultivation 27
Feb. 2004, M. Borges s.n. (MBML); obtained from
Orquidário Colibri in São Lourenço da Serra, São Paulo,
and said to have been collected locally, . cult. 2 July
2016, A. Toscano de Brito 3525A (UPCB).
Pabstiella versicolor (Porsch) Luer, Monogr. Syst.
Bot. Missouri Bot. Gard. 112: 121. 2007. Fig. 20–23.
Basionym: Pleurothallis versicolor Porsch, Oesterr.
Bot. Z. 55: 155. 1905. TYPE: Brazil. São Paulo:
Santos, Alto da Serra, 1901, R. Wettstein & V. F.
Schieffner s.n. (WU [0071622, photo seen]).
Synonyms: Pleurothallis podoglossa Hoehne, Arq.
Bot. Estado São Paulo, n.s., f.m., 1(1): 12. 1938,
syn. nov. TYPE: Brazil. São Paulo: São Paulo,
forest of Jardim Botânico de São Paulo, August
1936, O. Handro s.n. (holotype: SP [38565]).
Trichosalpinx podoglossa (Hoehne) Luer,
Phytologia 54: 396. 1983, syn. nov.
Specklinia podoglossa (Hoehne) Luer, Monogr. Syst.
Bot. Missouri Bot. Gard. 95: 263. 2004, syn. nov.
Pabstiella podoglossa (Hoehne) Luer, Monogr.
Syst. Bot. Missouri Bot. Gard. 112: 120. 2007, syn.
nov.
Figure 20. Pabstiella versicolor. Illustration of Pleurothallis versicolor published by Porsch in 1906, which appeared in
Ergebnisse der Botanischen Expedition der Kaiserlichen Akademie der Wissenschaften nach Südbrasilien 1901. Band
I: 18, plate 12, gures 16–23. The illustration is here modied to show oral segments with estimate scales. A - Flower,
side view; B - Dorsal sepal, side view; C - Dorsal sepal, abaxial view; D - Synsepal, adaxial view; E–F - Petals, variation
in shape, adaxial view; G - Petal, abaxial view; H - Lip, ¾ view.

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Figure 21. Pabstiella versicolor. Holotype specimen of Pleurothallis versicolor deposited at WU. By permission of the
Curator, Herbarium of the Institute of Botany, University of Vienna.

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180 LANKESTERIANA
Figure 22. Pabstiella versicolor. A - Habit; B – Flower, side view; C - Dorsal sepal; D - Synsepal; E–F - Petals; G–H - Lip;
I - Ovary, column (anther removed) and lip, side view. Drawn by C. A. Luer based on C. Luer 11612 (SEL).
Pleurothallis versicolor Porsch [=Pabstiella
versicolor (Porsch) Luer] was described based
on a collection by R. Wettstein & V. F. Schieffner
made during the botanical expedition of the Royal
Academy of Science of Vienna to southern Brazil in
1901. The specimen was collected in the municipality
of Santos in the state of São Paulo. An illustration
was not provided in the protologue, but Porsch (1906)

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Figure 23. Pabstiella versicolor. A - Apical portion of ramicaul, leaf and inorescence; B - Flower, side view; C - Ramicaul,
leaf and inorescence; D - Pseudo-lepanthiform sheaths of ramicaul. Based on A. Toscano de Brito 3280 (UPCB).
Photograph by W. Collier & A. Toscano de Brito.
AB
C D
5 cm 5 cm
3 mm
0.5 mm

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182 LANKESTERIANA
later published a number of ne colored drawings
of a ower and oral dissections (Fig. 20). These
drawings and the type specimen at WU (Fig. 21)
leave no doubt that this species and Pleurothallis
podoglossa Hoehne are conspecic. They share the
same oral and vegetative morphology, including the
same pseudo-lepanthiform sheaths of the ramicauls.
Figure 22 shows an illustration based on a specimen
cultivated at São Paulo Botanical Garden (C. Luer
11612, SEL), and Figure 23 illustrates a collection
from Paraná, south of Brazil (A. Toscano de Brito
3280, UPCB).
AddiTi onAL mATeriA L exAmin ed: Brazil. Paraná. São
José dos Pinhais, Represa do Vossoroca, collected
and cultivated by M. Klingelfus s.n., flowered in
cultivation 26 July 2014, A. Toscano de Brito 3280
(UPCB). Rio Grande do Sul: Cambuí, Itaimbezinho,
collected by L.P. Queiroz s.n., 28 January 1983,
flowered in cultivation at São Paulo Botanical
Garden, nr. 13338, May 1986, C. Luer 11612 (SEL);
Canela, flowered in cultivation, May–April 2012,
J. Kelin 69 (UPCB). São Paulo: collected and
cultivated near Moji das Cruzes by M. Kayasima s.n.,
600 m, 10 March 2007, D.H. Baptista s.n. (SEL).
Without collection data: flowered in cultivation
by Rafael Bianchi Galanti, Embu, 11 March 2007,
D.H. Baptista s.n. (SEL); flowered in cultivation
at Orquidário Alvin Seidel, without date, A. Seidel
1309 (SEL).
new comBinATion
Pabstiella deltoglossa (Cogn.) Toscano & Luer, comb.
nov. Fig. 24.
Basionym: Pleurothallis deltoglossa Cogn., Bull. Soc.
Roy. Bot. Belgique 43: 315. 1906 (publ. 1907).
Synomym: Specklinia deltoglossa (Cogn.) Luer,
Monogr. Syst. Bot. Missouri Bot. Gard. 95: 260.
2004.
Pleurothallis deltoglossa Cogn. was described
based on a specimen collected by Comissão
Geográca e Geológica do Estado de São Paulo nr.
2567. The original Comissão’s number 2567 is actually
a mixture of two taxa, Pleurothallis acutidentata
Cogn. and Pleurothallis deltoglossa, both described as
new species by Cogniaux in 1907. We have examined
the type specimens of these two species during a
recent visit to BR. Images of these specimens can
be found in the website of Jardin botanique national
de Belgique (http://www.br.fgov.be/RESEARCH/
COLLECTIONS/HERBARIUM/advancedsearch.
php). One of them, the holotype of Pleurothallis
deltoglossa, is shown in Figure 24 of the present
article. In both cases, only one old, badly attened
ower remains in the type sheets of the specimens
preserved at BR. While Pleurothallis acutidentata is
most probably conspecic with the frequent and rather
variable Pleurothallis fusca Lindl. [= Pabstiella fusca
(Lindl.) Chiron & Xim.Bols.], Pleurothallis deltoglossa
was shown to be a distinct species presenting a number
of features that distinguishes it from other species
now placed in the genus Pabstiella. Although similar
in habit to several species related to Pabstiella fusca,
its oral morphology is quite distinct. As described by
Cogniaux (1907), the petals of Pleurothallis deltoglossa
are obovate with rounded apex, nely denticulate
above, and externally nely papillose, the lip, the most
distinctive oral part, is narrowly triangular with entire
margins, nely papillose above, and broadly trilobed
at apex. The extant, attened and apparently damaged
lip is kept in a small separate envelope on the type
sheet. The poor condition of this oral part precluded
a proper examination, but it agrees in overall with
Cogniaux’s description and especially with his sketches,
which accompany the type specimen. This species has
apparently never been recollected since its discovery
and description over a century ago, and can be now
extinct. However, it is also possible that it has just been
confused in public and private collections with some
of the several similarly endemic species to the Atlantic
forest of southeast Brazil and may be just waiting to be
rediscovered.
AcKnowLedgmenTs. The present paper is part of the
project “The Pleurothallid Orchids of Brazil: Contributions
to an inventory and an understanding of evolution, ecology
and conservation,” currently sponsored by the Marie
Selby Botanical Gardens, and “Estudos logenéticos e
taxonômicos em Pleurothallidinae e Oncidiinae - clado
Ornithocephalus (Orchidaceae), sponsored by Universidade
Federal do Paraná and Coordenação de Aperfeiçoamento
de Pessoal de Nível Superior (CAPES), Brazil. We thank
CAPES for grant Programa Pesquisador Visitante Especial
(PVE), nr. 88881.065009/2014-0, to ALVTB. We are also

LANKESTERIANA 16(2). 2016. © Universidad de Costa Rica, 2016.
ToscAno de BriTo and Luer — New species and nomenclatural notes in Pabstiella 183
Figure 24. Pabstiella deltoglossa. Holotype of Pleurothallis deltoglossa at BR. Reproduced with permission. Copyright:
Jardin Botanique Meise.

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184 LANKESTERIANA
grateful to the directors and curators of the herbaria cited
in this article for sending specimens on loan, allowing
access to their collections or making available images of
type specimens and historical material. We thank Gustavo
A. Romero and Irina Ferrera for their assistance during our
visits to AMES and for providing information on Oakes
Ames’s collections deposited at AMES, Henrik Ærenlund
Pedersen for help in obtaining information on Warming’s
collections deposited at C, and Leslie A. Garay for help
in obtaining literature. We acknowledge the services of
Coordenação de Proteção e Conservação Florestal, Diretoria
de Uso Sustentável da Biodiversidade e Florestas, IBAMA,
Brazil, and the Plant Inspection Station at J. F. Kennedy
International Airport, New York, U.S.A., for issuing the
CITES permits that allowed the exchange and transportation
of some specimens treated here; Sistema de Autorização e
Informação em Biodiversidade/Instituto Chico Mendes
de Conservação da Biodiversidade (SISBIO/ICMBio) for
the collecting permits; Jacques Klein, Luiz Filipe Varella,
Marcos Klingelfus and Sávio Caliman for providing
material for study; Wade Collier and Nancy Karam for help
in assembling the illustrations; Stig Dasltröm for inking
the line drawings, and the Pleurothallidinae Alliance for
making it possible.
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