Thai Forest Bulletin (Botany) <p>Thai Forest Bulletin (Botany)&nbsp;- here referred to as TFB (Botany) -&nbsp;was first published in 1954 by the Royal Forest Department, under the leadership of its first editor Prof. Dr. Tem Smitinand. In 2002, the journal was published by the Department of National Parks, Wildlife and Plant Conservation with Prof. Dr. Thawatchai Santisuk as editor, supported by editorial board members from several prominent herbaria in Europe. At present, the TFB (Botany) is published by the Forest Herbarium in Bangkok, with Dr. Rachun Pooma and Dr. Tim Utteridge as editors. The journal is published once a year, usually in September-December with the manuscript no submission deadline, and articles are published in English. All manuscripts are peer reviewed by international scientists and edited by native English language speakers on the editorial board before acceptance and publication.&nbsp;TFB (Botany) will become both printed and electronic journal starting with volume 44 (2016), and through the TFB (Botany) Archive, every article published since 1954 is available and completely searchable online.</p> <p>ISSN : 0495-3843&nbsp;(print), 2465-423x (electronic)</p> Forest Herbarium (BKF) en-US Thai Forest Bulletin (Botany) 0495-3843 Rhynchoglossum ausculum (Gesneriaceae), a new species from South-Western Thailand <p>The new species of <em>Rhynchoglossum</em> <em>ausculum</em>, from South-Western Thailand is described and illustrated. An emended key to the Thai species of <em>Rhynchoglossum</em> is provided.</p> Nannapat Pattharahirantricin Manop Poopath Copyright (c) 2021 Forest Herbarium 2021-07-24 2021-07-24 49 2 157 162 10.20531/tfb.2021.49.2.01 Additions to Annonaceae in the Flora of Thailand <p>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 <em>Fissistigma</em>. In addition, several species previously placed in synonymy are re-instated, for which we propose three new combinations in the genera <em>Mitrella</em>, <em>Monoon</em>, and <em>Sphaerocoryne</em>.</p> David M. Johnson Pasakorn Bunchalee Piya Chalermglin Pranom Chantaranothai Charan Leeratiwong Nancy A. Murray Richard Saunders Yotsawate Sirichamorn Yvonne Su Phanom Sutthisaksopon Copyright (c) 2021 Forest Herbarium 2021-07-28 2021-07-28 49 2 163 172 10.20531/tfb.2021.49.2.02 The genus Phyllocyclus (Gentianaceae) in Thailand <p>An account of the genus <em>Phyllocyclus</em> (Gentianaceae) for Thailand is presented. Three species are recognized, including two recently reported species, <em>Phyllocyclus petelotii</em> and <em>P. parishii</em>. A key to the Thai species, descriptions, illustrations, and conservation status are provided.</p> Kotchaphan Sisakhon Kongkanda Chayamarit Narong Wongkantrakorn David Middleton Wittawat Kiewbang Watchara Salee Srunya Vajrodaya Copyright (c) 2021 Forest Herbarium 2021-09-10 2021-09-10 49 2 173 177 10.20531/tfb.2021.49.2.03 Torenia maculata (Linderniaceae), a new record for Thailand <p><em>Torenia maculata</em>, is a newly recorded species for Thailand. A description, illustrations and comments on its ecology and distribution are provided.</p> Phanom Sutthisaksopon Pranom Chantaranothai Somran Suddee Copyright (c) 2021 Forest Herbarium 2021-09-15 2021-09-15 49 2 178 181 10.20531/tfb.2021.49.2.04 Twelve new records of Pteridophytes from Bolaven Plateau, southern Laos <p>Twelve pteridophytes from six families are reported from the Bolaven Plateau, southern Laos, as new records to the flora of Laos. For each species, voucher specimens, photographs and additional information including geographical distribution, ecology and taxonomic notes are provided.</p> Thyraphon Vongthavone Shuichiro Tagane PHONGPHAYBOUN PHONEPASEUTH KEOOUDONE SOUVANNAKHOUMMANE Phetlasy Souladeth Copyright (c) 2021 Forest Herbarium 2021-09-30 2021-09-30 49 2 182 190 10.20531/tfb.2021.49.2.05 Two new species and a new record of Begonia (Begoniaceae) from Vangvieng karst limestone in central Laos <p><em>Begonia cataracta</em> and <em>B. voluptuaria</em> are described as new species and <em>B. incerta</em> is noted as a new record for Laos. Descriptions, illustrations and photographs are provided for the new species and photographs for the new record. Preliminary conservation assessments are made for the two new species which are assessed as Vulnerable and Critically Endangered respectively.</p> Soulivanh Lanorsavanh Keooudone Souvannakhoummane Vichith Lamxay Khamfa Chanthavongsa Copyright (c) 2021 Forest Herbarium 2021-10-11 2021-10-11 49 2 191 200 10.20531/tfb.2021.49.2.06 Begonia sirindhorniana (Begoniaceae) a new species from Thailand <p><em>Begonia sirindhorniana</em>, a new species from South-Western Thailand is described and illustrated.</p> Thamarat Phutthai Theerawat Thananthaisong Kunanon Daonurai Priwan Srisom Somran Suddee Mark Hughes Copyright (c) 2021 Forest Herbarium 2021-10-11 2021-10-11 49 2 201 205 10.20531/tfb.2021.49.2.07 The genus Gaertnera (Rubiaceae) in Thailand <p>Two species of <em>Gaertnera</em> in Thailand, viz. <em>G. junghuhniana</em> and <em>G. sralensis</em>, are enumerated and described. A lectotype is designated for <em>G. taiensis</em>, a synonym of <em>G. junghuhniana</em>. A key to species and data on distribution, habit and phenology are also provided.</p> Khanit Wangwasit Kamolhathai Wangwasit Copyright (c) 2021 Forest Herbarium 2021-10-15 2021-10-15 49 2 206 211 10.20531/tfb.2021.49.2.08 New species and new records for the climber genus Friesodielsia (Annonaceae) in the flora of Thailand <p>Six new species of <em>Friesodielsia</em> (Annonaceae) are described and illustrated, seven species are documented for Thailand for the first time, and <em>Oxymitra fornicata</em> var. <em>glabra</em> is raised to species rank as <em>Friesodielsia andamanica</em>. These additions bring the species diversity of <em>Friesodielsia</em> in Thailand to 16 species. A key to the Thai species is provided.</p> Charan Leeratiwong Piya Chalermglin Jiratthi Satthaporn Kithisak Aongyong David M Johnson Copyright (c) 2021 Forest Herbarium 2021-10-25 2021-10-25 49 2 212 230 10.20531/tfb.2021.49.2.09 Akaniaceae, a new family record for Laos <p>A collection from Phou Chom Voy Provincial Protected Area, Bolikhamxai, represents the first records for the family Akaniaceae as well as the genus <em>Bretschneidera</em> and the species <em>Bretschneidera sinensis</em> in Laos. Here we report the new and extended distributional range. A detailed description and photographs are provided for easy identification.</p> Soulivanh Lanorsavanh Vichith Lamxay Sawai Mattapha Keooudone Souvannakhoummane Khamfa Chanthavongsa Somchanh Bounphanmy Copyright (c) 2021 Forest Herbarium 2021-10-25 2021-10-25 49 2 231 235 10.20531/tfb.2021.49.2.10 Notes on the genus Ardisia (Primulaceae) in Thailand and Peninsular Malaysia <p>The lectotype for <em>Ardisia kerrii</em> is designated here. <em>Ardisia </em><em>cordulata</em> var. <em>appresso-hirsuta</em>&nbsp;is placed as a new synonym of <em>A. demissa</em>. Additionally, the correct locations of four species that were misinterpreted are also given. Now <em>A. betongensis</em> is excluded from the list of Thai <em>Ardisia.</em></p> Suparman Suparman Pimwadee Pornpongrungrueng Pranom Chantaranothai Copyright (c) 2021 Forest Herbarium 2021-11-22 2021-11-22 49 2 236 240 10.20531/tfb.2021.49.2.11 Uvaria clementis (Annonaceae), a new record for Thailand <p>A new species record for Thailand, <em>Uvaria clemantis</em>&nbsp;is discovered from Khao Luk Lom Mountain, Rattaphum District, Songkhla Province<strong>. </strong>A description and photographs are provided<strong>.</strong></p> Charan Leeratiwong Saijai Jornead Conor V. Meade Copyright (c) 2021 Forest Herbarium 2021-11-25 2021-11-25 49 2 241 244 10.20531/tfb.2021.49.2.12 Comments on the typification of two names in Bauhinia, now under Phanera (Leguminosae: Cercidoideae) <p>A lectotype is designated here for <em>Bauhinia cardinalis</em>, the basionym of <em>Phanera cardinalis</em> and a second-step lectotype is designated here for <em>B. penicilliloba</em>, the basionym of <em>P. penicilliloba</em>.</p> Subir Bandyopadhyay Gopal Krishna Anand Kumar Copyright (c) 2021 Forest Herbarium 2021-12-27 2021-12-27 49 2 245 246 10.20531/tfb.2021.49.2.13 The genus Pseudoraphis (Poaceae) in Thailand <p>A taxonomic study of the genus Pseudoraphis in Thailand was conducted. Four species, <em>P. balansae</em>, <em>P. brunoniana</em>, <em>P. minuta</em> and <em>P. spinescens</em> are reported. This genus is distributed in the Northern, Eastern, Central, South-Eastern, and Peninsular floristic regions of Thailand. All the species are aquatic or semi-aquatic, found in swampy places, marshes, lakes, paddy fields, ditches, moats and on sandy soils from sea level to 300 m. Morphological descriptions, distribution data, and ecological information are provided. All species are illustrated and a key to the species, based on morphological characters, is provided.</p> Paweena Wessapak Chatchai Ngernsaengsaruay Copyright (c) 2021 Forest Herbarium 2021-12-27 2021-12-27 49 2 247 257 10.20531/tfb.2021.49.2.14