Pranom Chantaranotahi

• Khon Kaen University

Observations and phenetic analyses of the leaf anatomy of 23 Smilax species from Thailand were carried out to assess the utility of anatomical characters in elucidating the taxonomy of the genus. The outline of the petiole in transverse section is circular or elliptic. The abaxial outline of the midrib is rounded, acute or attenuate. Parenchymatous...

A new species, Psychotria oxyalabastron, is described, and P. laui is newly recorded from Thailand. The description, distribution area, ecological information and taxonomic note are provided.

Syzygium kampotense is a new species from Cambodia. Syzygium cerasiforme, S. foxworthianum, and S. angkae and S. thorelii are new records from Cambodia, Vietnam and China, respectively. Syzygium prainianum subsp. minor and S. densinervium var. insulare are placed under S. prainianum and S. densinervium, respectively. Eugenia cochinchinensis, E. ebu...

Twenty-three species of Strobilanthes Blume with capitate inflorescences are enumerated in Thailand. Strobilanthes phengklaii Kladwong & Chantar., a new species from North-eastern Thailand, is described and illustrated. Strobilanthes paniculiformis J.R.I.Wood, S. phyllostachya Kurz and S. squalens S.Moore are new records in Thailand. Strobilanthes...

Background and Aim Catnip essential oils have antimicrobial effects against bacteria, yeast, and fungi; however, there is limited information regarding their antimicrobial activity against pathogens that cause canine skin infections. This study aimed to identify the phytochemical constituents of catnip essential oil and assay its antimicrobial acti...

The leaf epidermal anatomy of 23 Crotalaria species was studied. The leaf epidermis was prepared by peeling and clearing methods and observed by a light microscope. The results of the leaf epidermis showed that the shape of an epidermal cell is polygonal, irregular or jigsaw-like and the anticlinal wall is straight, curved or undulated. There are t...

A synopsis of Heliotropiaceae in Thailand is presented and, as part of this, the taxonomic history, identification keys, distribution maps, herbarium specimen citations and diagnostic characters are provided. Two genera and 12 species are recognised and four new combinations are proposed of Tournefortia under the genus Heliotropium , namely H. hook...

Digitaria is a large pantropical genus, which includes a number of economically problematic agricultural weeds. Difficulties in species identification and the circumscription of the genus have previously hindered progress in understanding its evolution and developing a stable classification. We investigate the evolutionary history of Digitaria by c...

A synopsis of Heliotropiaceae in Thailand is presented together with the taxonomic history, identification keys, distribution, phenology, herbarium specimen citations and diagnostic characters of each species. The taxonomic character of the family is of terminal style with a conical stigma structure forming a basal ring around the style. There are...

Tarenna thorelii is reported as a new record for Thailand based on collections from Khon Kaen and Roi Et Provinces. A morphological description based on Thai specimens, distribution, ecological information, conservation status, and short notes on the species as well as an illustration are provided. In addition, a lectotype for T. thorelii is propos...

A new species of Madhuca from Thailand, M. kanchanaburiensis is described and illustrated. The species appears most similar to M. malaccensis and M. punctata, but differs in having conspicuous secondary veins toward the leaf margin, woolly filaments and longer corolla. The vernacular name and conservational status of this endemic species are also p...

There are two species of Pleurolobus and five species of Sohmaea in Thailand and Indo-China. Pleurolobus flexuosus and Sohmaea laxiflora are newly recorded for Cambodia. Taxonomic information of all species is provided. Lectotypes of six names, Desmodium cavaleriei, D. flexuosum, D. laxiflorum, D. macrophyllum, D. ormocarpoides var. velutina, and D...

We update the descriptions of seventeen native species of Peperomia in Thailand, including a new species, P. ranongensis, and a detailed morphological description for the uncommon species P. kotana based on Thai specimens. We provide a generic description, a key to all the species and provide lectotypifications for P. bavina, P. heyneana, P. latica...

The external pollen morphology of the family Sapotaceae in Thailand was examined using the acetolysis method to determine its taxonomic significance. Pollen of 39 specimens belonging to 32 species was investigated by means of light and scanning electron microscopy. Pollen grains are found to be monads, isopolar, colporate, lalongate, and variable i...

Smilax bockii is proposed as an accepted name, and S. septemnervia is treated as a new synonym of S. seisuiensis. Smilax bockii and S. seisuiensis are reported as new records from Laos and Thailand, respectively. The lectotypes of S. bockii and S. stemonifolia are designated. Detailed descriptions, taxonomic notes, photographs and a distribution ma...

Strobilanthes spirei is proposed as a new combination of Clinacanthus spirei. Strobilanthes hypomalla and S. spirei are newly recorded for Thailand. The lectotypification of S. hypomalla is made. A detailed description of morphology and pollen features is provided as well as photographs, distribution map, ecology and taxonomic notes.

Mastixia langbianensis Phan Ke Loc & Chantar., a new species from southern Vietnam, is described. A key to the species of Mastixia in Vietnam is presented.

Two new species of genus Grewia, G. scabrifolia and G. thailandica from Thailand are described and illustrated. A revised key of the species to the Thai Grewia is also presented.

A palynological study of 16 species of Piper L. in Thailand was undertaken using light and scanning electron microscopy. The pollen is monad, heteropolar, monocolpate, kidney shaped or spheroidal. The ornamentation of pollen can be classified into four types: psilate, scabrate, fossulate and rugulate with sparsely distributed spinules. Pollen data...

During preparation of a revision of the genus Eranthemum (Acanthaceae), it became evident that nine specimens from eastern and south‐eastern floristic regions of Thailand and southern Laos represent a new species which is herein described, illustrated and given the name E. decumbens. The new species has affinities to E. strictum and E. roseum. A ke...

Work toward completion of the Annonaceae treatment for the Flora of Thailand revealed 18 species previously unrecorded for the country, six of them in the genus Fissistigma. In addition, several species previously placed in synonymy are re-instated, for which we propose three new combinations in the genera Mitrella, Monoon, and Sphaerocoryne.

Torenia maculata, is a newly recorded species for Thailand. A description, illustrations and comments on its ecology and distribution are provided.

The lectotype for Ardisia kerrii is designated here. Ardisia cordulata var. appresso-hirsuta is placed as a new synonym of A. demissa. Additionally, the correct locations of four species that were misinterpreted are also given. Now A. betongensis is excluded from the list of Thai Ardisia.

This paper presents five newly recorded species of Flemingia present in two subgenera; Flemingiastrum and Rhynchosioides. Four species are new for Thailand: F. nana, F. semialata, F. vestita and F. wallichii. One species, F. nana, is new for Myanmar, and one species, F. wightiana, is new for Laos. Two taxa, F. brevipes and F. latifolia var. siamens...

This paper presents five newly recorded species of Flemingia present in two subgenera; Flemingiastrum and Rhynchosioides. Four species are new for Thailand: F. nana, F. semialata, F. vestita and F. wallichii. One species, F. nana, is new for Myanmar, and one species, F. wightiana, is new for Laos. Two taxa, F. brevipes and F. latifolia var. siamens...

Gynochthodes betongensis, a new species from Thailand, is described and illustrated. Gynochthodes cinnamomoea (syn. Morinda cinnamomea) is placed in the synonymy of G. villosa. Gynochthodes hispida is newly recorded for Thailand. Lectotypes are designated for G. puberula and M. cinnamomea. A key to the Thai species is also presented.

New combinations for five taxa in the Hedyotis-Oldenlandia complex (Rubiaceae) in Thailand are proposed, namely Debia rosettifolia, Dimetia capitellata var. pubescens, D. prainiana, D. ridleyana and Scleromitrion kerrii. Six relevant taxa are lectotypified.

Seven genera and 22 species enumerated in Thailand with 3 genera (Barringtonia, Careya and Planchonia) and 18 species native, and 4 genera (Bertholletia, Couroupita, Grias and Gustavia) and 4 species introduced.

All native and introduced Thai Piper are enumerated to include 46 species and two varieties. Typifications for accepted names and synonyms are made where necessary. Family and generic descriptions, based on Thai collections, are provided. A key to species and varieties and relevant synonymy are also presented. Additional morphological characters fo...

A synopsis of the genus Rungia in Thailand is presented. The 14 species are listed together with a synoptic account of each species and an identification key is provided. Rungia repens is selected as the type of Rungia. One species, Rungia brandisii is a new record for Thailand. Lectotypes are selected for Rungia adnata, R. brandisii, R. diversibra...

This taxonomic study of the genus Ototropis in Thailand is based on the specimens from 30 European and Asian herbaria and field surveys. We recognize six species: O. amethystina, O. hayatae, O. kingiana, O. megaphylla, O. multiflora and O. sequax. We provide a key to the species, species descriptions, lists of specimens examined, distribution, ecol...

Corchorus fascicularis is first reported for Thailand. Triumfetta repens is not currently reported from Thailand anymore, although given the overall distribution of this species it may have been overlooked. Lectotypifications of Colona elobata, Columbia flagrocarpa var. siamensis, C. winitii, Corchorus siamensis, Grewia lacei and G. winitii are pro...

Two Phyllanthus species are newly described from a limestone mountain in the north of Thailand. The first species, P. huamotensis Pornp., Chantar. & J.Parn., sp. nov. , is one of the most distinct Phyllanthus species easily distinguished by its reddish branchlets and stem, conspicuous reddish venation, especially on the lower leaf surface, red sepa...

During preparation of the account of the genus Millettia (Fabaceae: Faboideae) for the Flora of Thailand, some new field collections and specimens from herbaria were found to represent three new species, and here they are described and illustrated with a distributionmap. Lectotypes of Millettia names are designated for nine species, five new synony...

Two new species, Justicia flavescens and J. vasculosoides are described and illustrated from northern Thailand. Both species have restricted distributions. The conservation status of each species is assessed.

A synopsis of the genus Prismatomeris in Thailand is presented. Eight species are recognized and P. glabra is newly recorded for Thailand; P. tetrandra subsp. malayana is no longer recognized as a distinct taxon. Descriptions of the genus and the newly recorded species are provided, as well as a key to the Thai species and notes on ecology, distrib...

Morinda talmyi is a new combination proposed here for M. persicifolia var. talmyi. Morinda pandurifolia is confirmed as a synonym of M. persicifolia. Lectotypes for Morinda angustifolia var. scabridula, M. longifolia, M. nana, M. pandurifolia var. tenuifolia, M. persicifolia var. talmyi, M. pumila and M. scabrida are designated here.

The genus Codariocalyx Hassk. in Thailand is revised. Three species viz. C. gyroides (Roxb. ex Link) X.Y.Zhu, C. microphyllus (Thunb.) H.Ohashi and C. motorius (Houtt.) H.Ohashi are recognized. A key, descriptions, photographs, distribution maps, ecological and phenological data and vernacular names are provided. The anatomy of the leaf and stem ar...

A new species, Polyalthia khaoyaiensis, is proposed based on materials from central Thailand. The species appears most similar to Polyalthia meghalayensis and Polyalthia evecta, differing from these taxa in having shorter pedicels and usually two (rather than one) ovules per carpel. From P. meghalayensis it differs further in absence of a claw from...

Meizotropis buteiformis (Leguminosae), a new genus and species record for Thailand, is described and illustrated.

Two species, Millettia penicillata and M. pierrei, are recorded as new for Thailand. The latter is lectotypified and its characteristics are discussed with the close genera. Illustrations, descriptions, taxonomic notes and distribution map are provided.

A new record, Helicteres prostrata in Thailand is described and illustrated. Lectotypes of H. poilanei and H. vinosa are also selected.

Three species of Argostemma (Rubiaceae) are newly recorded for Lao PDR: A. ebracteolatum, A. pictum and A. verticillatum. Descriptions and photographs of the new records are provided, and a key to Argostemma in Lao PDR is presented.

The pollen morphology of four genera and 33 taxa of Lecythidaceae in Southeast Asia was investigated, including 26 taxa of Barringtonia, one taxon each of Careya and Chydenanthus, and five taxa of Planchonia to determine which, if any, taxonomically important characters were present and the implications they have for the systematics of the family....

Ehretia silvana, a tree from limestone habitat in Uthai Thani province, is newly recorded for Thailand. A description and illustrations are provided, together with a conservation assessment and a new key to the species of Ehretia in Thailand.

Seven taxa of Thai Campylotropis are recognized: C. bonii Schindl., C. capillipes (Franch.) Schindl. subsp. prainii (Collett & Hemsl.) Iokawa & H.Ohashi, C. decora (Kurz) Schindl., C. harmsii Schindl., C. parviflora (Kurz) Schindl., C. pinetorum (Kurz) Schindl. and C. sulcata Schindl. The reinstatement of C. parviflora is proposed here and C. cytis...

https://botany.dnp.go.th/eflora/florafamily.html?factsheet=Polygonaceae&volumeno=14

Gardenia saxatilis E.T. Geddes and Neohymenopogon parasiticus (Wall.) Bennet are newly recorded for Laos.

Recent fi eldwork to Central Laos region unveils two new records of Argostemma Wall., namely A. neurocalyx Miq. and A. siamense Puff for Laos. Detailed descriptions and photographs of these two species are provided here. A key to all Argostemma species enumerated for Laos is given.

A nomenclatural revision of 13 species of Piper is presented (P. arcuatum, P. caninum, P. crassipes, P. griffithii, P. kurzii, P. longum, P. muricatum, P. pedicellatum, P. porphyrophyllum, P. ribesioides, P. ridleyi, P. rostratum and P. sylvaticum). A total of 23 lectotypifications are made and many names are reduced to synonymy. Diagnostic charact...

A nomenclatural synopsis of 11 of the 28 Smilax species recorded in Thailand (S. bracteata, S. calophylla, S. corbularia, S. davidiana, S. extensa, S. hemsleyana, S. luzonensis, S. myosotiflora, S. myrtillus, S. perfoliata and S. prolifera) is presented. Three names, S. helferi var. maingayana, S. microchina and S. ocreata are placed into synonymy...

A new combination, Rotheca macrostachya is made. Rotheca vanprukii is reduced to synonymy with R. serrata. Notes and photographs are also provided.

Eleven synonyms for five Nephelium species: N. cuspidatum Blume, N. hypoleucum Kurz, N. juglandifolium Blume, N. lappaceum L. and N. melanomiscum Radlk. and 11 synonyms of Xerospermum noronhianum (Blume) Blume are discussed and typified.

Mucuna acuminata Grah. ex J.G.Baker is newly recorded for Thailand. Description and illustrations are provided.

Smilax asiatica Kladwong, Chantar. & D.A.Simpson and S. goeringii Kladwong, Chantar. & D.A.Simpson are proposed as new names for two later homonyms, S. laevis A.DC. and S. japonica (Kunth) P.Li & C.X.Fu, respectively. Two taxa are reduced to synonymy: S. petiolatumidus B.R.Moore, Narkkong, Th.Moore & Lutat is placed into the synonymy of Dioscorea c...

In the present study, three synonyms of Schizomussaenda henryi, namely Emmenopterys rehderi, Mussaenda dehiscens and Schizophragma macrosepalum are lectotypified. Additionally, a revised description of S. henryi is provided based on Thai materials examined. Schizomussaenda henryi from Thailand is illustrated.

The genus Cajanus in Thailand is revised. It comprises five species, C. cajan, C. elongatus, C. goensis, C. scarabaeoides and C. volubilis. A key, descriptions, distributions and ecological data, vernacular names and photographs are presented. A lectotype for Atylosia siamensis is designated here. One species, C. elongatus, is a new record for Thai...

Taxonomic study of genus Hylodesmum H.Ohashi & R.R.Mill in Thailand is revised. Three species are recognised, H. laxum (DC.) H.Ohashi & R.R.Mill subsp. laxum, H. leptopus (A.Gray ex Benth.) H.Ohashi & R.R.Mill and H. repandum (Vahl) H.Ohashi & R.R.Mill. A key to species, descriptions, ecological data, phenology, vernacular names and distribution ma...

A revision of the 45 species of Crotalaria in Myanmar, Thailand, Laos, Cambodia, Vietnam, Malaysia and Singapore is presented. Crotalaria humifusa is recorded as new for Thailand and Vietnam while C. phyllostachya are recorded as new for Thailand only. Crotalaria collettii is reduced to synonymy under C. alata. Lectotypes are designated for Crotala...

The present work aims to revise the family Lecythidaceae in Southeast Asia based on literature, herbarium collections from major relevant herbaria such as AAU, BCU, BK, BKF, BM, BO, CMU, CMUB, E, FOF, HN, HNL, HNU, K, KEP, KKU, L, P, PSU, QBG, SING and TCD, as well as a field survey. Five genera and 69 species were enumerated including 58 species o...

The pollen morphology of four genera and 31 species of the family Lecythidaceae from Southeast Asia was investigated to determine its taxonomic implication. The pollen samples were acetolyzed and investigated under light and scanning electron microscopies. The result showed that the pollen grains are monads, radially symmetrical, isopolar, small to...

The pollen morphology of 22 species of Barringtonia (Lecythidaceae) from Southeast Asia was investigated to determine its taxonomic implication. The pollen samples were acetolyzed and investigated under light and scanning electron microscopy. The result showed that the pollen grains are monads, radially symmetrical, isopolar, small to medium-sized,...

Three new species of Barringtonia (Lecythidaceae) are herein described, B. laxiflora Thammar., Pornp. & Chantar. and B. tomentosa Thammar., Pornp. & Chantar. from Vietnam, and B. parkinsonii Thammar., Pornp. & Chantar. from Myanmar. Distribution maps and illustrations are also presented.

Phyllanthus kaweesakii Pornp., Chantar. & J.Parn. sp. nov. is newly described from the limestone mountain ridges in the northeast of Thailand. Comparison of morphology, anatomy, pollen morphology, and DNA sequences of this species with the most similar existing species P. mirabilis Müll.Arg. was undertaken. The results indicated that the two taxa a...

Fimbristylis fusiformis, an unusual new species of Cyperaceae from Thailand, is described and illustrated. This taxon has a single terminal spikelet per culm with a semi-distichous glume arrangement, bisexual flowers that lack perianth parts, and pistil with persistent style whose base is slightly swollen and trigonous nutlets with pubescent ribs....

The Dimocarpus longan Lour. (Sapindaceae) species complex is reevaluated, and D. longan s.l. is divided into three species, of which two are divided into two varieties. Three new combinations, D. cinereus (Radlk.) Boonsuk & Chantar., D. cinereus var. echinatus (Leenh.) Boonsuk & Chantar., and D. scandens (Winit & Kerr) Boonsuk & Chantar., are here...

Phanera larseniana, a new species from north–eastern Thailand, is described and illustrated. It most closely resembles P. rubro-villosa but differs in the length of the floral parts, and in the number and position of the staminodes. The species is known only from a single locality in north-eastern Thailand. An illustration and photos of the new spe...

A new species of Pogostemon Desf., P. nudus Bongcheewin & Pramali, is described, illustrated and compared with the similar P. menthoides from Thailand. Morphological characters, especially the micromorphology of nutlets and leaf epidermis, and conservation status in accordance with the IUCN red list categories and criteria are described and discuss...

Seed morphology of 19 Crotalaria species in Thailand was studied using stereoscopic microscopy and scanning electron microscopy. Five different morphological types are described based on differences in shape, aril, fracture lines, size and seed coat surface. Each type is morphologically described, compared, illustrated, and the taxonomic implicatio...

Four new species of Peperomia (Piperaceae) from Thailand, namely P. heptaphylla, P. masuthoniana, P. multisurcula and P. sirindhorniana are described and illustrated. The reinstatement of P. dindygulensis is also proposed with supporting morphological evidence.

Three tribes, 12 genera and 38 species of the ginger family (Zingiberaceae) along five routes in Nam Nao National Park were surveyed between January 2012 and December 2013 to determine their diversity, ecological data, phenology, uses and conservation status. The highest diversity was found in the tribe Zingibereae (6 genera and 21 species), of whi...

The three species of Alysicarpus known from Thailand are described with notes on their distribution and ecological data, vernacular names and photographs. They are Alysicarpus bupleurifolius, A. rugosus and A. vaginalis. A key for the identification of the three species is provided. A lectotype for Alysicarpus wallichii is selected here.

A new species, Flemingia sirindhorniae Mattapha, Chantar. & Suddee, from Tak province, Thailand, is described and illustrated, and its affinities are discussed. It is a very rare species in Thailand and its conservation status is assessed here as Data Deficient (DD).

A new species, Syzygium sirindhorniae, from Thailand, is described, illustrated and compared with Syzygium bokoense. This species is known from a restricted locality in northern Thailand which is within a protected area. A conservation status of Near Threatened (NT) is merited.

The following 10 species in the genus Premna (Lamiaceae) are lectotypified: Premna annulata, P. collinsiae, P. dubia, P. fulva, P. garrettii, P. paniculata, P. quadridentata, P. repens, P. serrata and P. siamensis. Premna collinsiae is reduced to the synonymy of P. pubescens and P. paniculata is also fully described for the first time following the...

Recent cluster analysis suggests that the genus Hackelochloa Kuntze (Poaceae) should not be included in the genus Mnesithea s.l. It is thus an appropriate time to revise the genus Mnesithea found in Thailand for the ongoing Flora of Thailand project. The genus is represented in Thailand by seven species (one with two varieties) including M. striata...

Two species and four taxa of the genus Abrus Adans. are found in Thailand viz. A. precatorius, A. pulchellus ssp. pulchellus, A. pulchellus ssp. cantoniensis and A. pulchellus ssp. mollis. Keys to species and subspecies are provided. Micromorphology of leaf surface and pollen were prepared by peeling and acetolysis methods, respectively. The leaf s...

Lepisanthes alata (Blume) Leenh. is presented as a new record from Su-ngai Kolok, Narathiwat, peninsular Thailand. The Flora of Thailand key to Lepisanthes is emended. A description and photos of the species are provided. Lectotypes for Otophora alata Blume and O. edulis C.E.C.Fischer are also selected.

Argostemma laotica, a new species from Laos, is described and illustrated. The species appears most similar to A. concinnum but differs in having pubescent stem, corolla and ovaries, oblique leaf base, shorter pedicel and smaller anthers which a dehiscence by an apical pore. The conservation status of this new species is vulnerable (VU D2).

Sixteen lectotypifications of Asian Piper species are provided. Piper argyrites, P. baccatum, P. leptostachyum, P. majusculum, P. peepuloides, P. quinqueangulatum and P. sulcatum are accepted as species and many new synonyms are proposed. Useful diagnostic characters are described and geographical distribution data of each species are provided.

A new species of Desmodium (Leguminosae), D. brevipedicellatum W.Saisorn, Chantar. & Balslev from Thailand and Laos is described and illustrated. Two taxa, D. concinnum DC. and D. laxiflorum DC. subsp. lacei (Schindl.) H.Ohashi, are reported as new for Thailand. Lectotypes of D. amoenum Wall. ex Benth. and D. penduliflorum Wall. ex Benth. are desig...

The taxonomic implication of leaf epidermal characters of four genera and 46 species of the Brazil nut family (Lecythidaceae) in Southeast Asia including 37 species of Barringtonia, one each of Careya and Chydenanthus and seven of Planchonia were investigated. The leaf epidermis was examined by peeling method and studied under light microscopy and...

A revision of the genus Blumea DC. in continental Southeast Asia, including Myanmar, Thailand, Laos, Cambodia, Vietnam and Peninsular Malaysia, is presented covering aspects of taxonomic history, key to taxa, synonymy, descriptions, and notes on distribution, ecology and phenology. Blumeopsis is reduced. Twenty-seven species are recognised, one of...

A taxonomic revision of the genus Digitaria (Poaceae) is presented for mainland Southeast Asia (Cambodia, Lao PDR, Myanmar, Peninsular Malaysia, Thailand and Vietnam). A total of 27 species (29 taxa) is enumerated. Two cultivated species, D. eriantha and D. milanjiana, are excluded from this account. A key to sections and species is provided and su...

Arthur Francis George Kerr’s life is reviewed and related to a previously published account. Kerr’s collecting activity is analysed using an expanded version of the Thai Biogeography Group’s database of collections. 8,666 of the total 48,970 collections are Kerr’s and 3,178 are those of his colleagues and friends. Therefore, the total number of col...

A new species of Barringtonia (Lecythidaceae), B. thailandica, is described from eastern Thailand. This species resembles B. acutangula in habit, leaf and flower characters, but differs mainly by its ellipsoid-shaped fruit with eight ribs. Additionally, B. schmidtii is reinstated as an independent species and it can be distinguished from its closel...

The present work aims to revise the Brazil nut family (Lecythidaceae) in Thailand, Cambodia, Laos and Vietnam based on literature, herbarium collections from major relevant herbaria such as BCU, BK, BKF, BM, BO, CMU, CMUB, E, HN, HNL, HNU, K, KEP, KKU, L, PSU, QBG, SING and TCD, as well as a field survey particularly in Thailand. Three genera and 2...

The protection of tropical forests is one of the most urgent issues in conservation biology because of the rapid deforestation that has occurred over the last 50 years. Even in protected forests, the anthropogenic effects from newly expanding villages such as harvesting of medicinal plants, pasturing cattle and forest fires can induce environmental...

The present work aims to revise the genus Barringtonia J.R. Forst. & G. Forst. in Southeast Asia based on literatures, herbarium collections from 15 major herbaria, as well as a field survey between June 2013 and June 2015. Fifty five species were recorded. Barringtonia schmidtii Warb. ex Craib which had previously been reduced as a synonym of B. a...

The genus Elsholtzia (Lamiaceae) in Thailand is revised in preparation for the Flora of Thailand treatment. Eight species are found in Thailand, three of which, E. blanda, E. kachinensis and E. pilosa, are lectotypified. Elsholtzia griffithii and E. penduliflora are recorded for Thailand for the first time.

The present work aims to revise the genus Barringtonia J.R. Forst. & G. Forst. in Southeast Asia based on literatures, herbarium collections from 15 major herbaria, as well as a field survey between June 2013 and April 2015. Fifty five species were recorded. Barringtonia schmidtii Warb. ex Craib which had previously been reduced as a synonym of B....

Hedyotis puffii is described and illustrated based on material from Thailand. The new species differs from H. tavoyensis by its obtuse angled stems, usually with (0­­ ̶ )1 ̶ 2 glands on the calyx margin and the sinus of the calyx that has no interposed subulate teeth. The conservation status of this new taxon is vulnerable (VU D2). In addition the...

A taxonomic revision of the genus Butea in Thailand is presented. Two species, B. monosperma and B. superba are enumerated. Key to species, descriptions, distributions and vernacular names are given. The habit, bark, the length of anthers, an outline and ridge of petiole, shape of epidermal cells on adaxial surface and crystal types are characteris...

The taxonomy of genus Phyllodium in Thailand was studied. The results showed that six species are enumerated. Morphological descriptions and photographs, key to species, distribution and some ecological data are given. Moreover, both pollen morphological and leaf epidermal characters of three and five species. respectively are presented.

Kunstleria forbesii Prain, a new record from Southern Thailand, is described.

A synopsis of the 17 Mussaenda species occurring in Thailand is presented, one of which, M. garrettii Craib is endemic to Thailand. Mussaenda cambodiana Pierre ex Pit. var. lanceolata Craib, M. longisepala Geddes, M. glabra Vahl var. puberula King, M. mollis Geddes, M. oblonga King and M. villosa Wall. ex G.Don var. herveyana King are reduced to sy...

Uraria hispida (Franch.) Schindl. is newly reported from northern Thailand. Description, illustrations and distribution map based on Thai specimen are provided.