Thai Forest Bulletin (Botany) 2019-08-02T09:28:32+07:00 Dr. Rachun Pooma Open Journal Systems <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> Chromosome counts and karyotype reports from Fimbristylis (Cyperaceae) in Thailand 2019-07-11T15:46:28+07:00 Wilailux Zumstein Kamolhathai Wangwasit <p>The somatic chromosome numbers and karyotype of Thai <em>Fimbristylis</em> species were determined from root tips. The chromosome counts and karyotype formulae are 2n=20 (16m+4sm) for <em>F. argentea</em>, 2n=26 (2M+10m+14sm) for<em> F. dichotoma</em>, 2n=4 (2m+2sm) for <em>F. pubisquama</em>, 2n=10 (6m+4sm) for <em>F. insignis</em>, 2n=10 (8m+2sm) for <em>F. eragrostis</em>, <em>F. fusca</em>, <em>F. littoralis</em>, <em>F. ovata</em> and <em>F. umbellaris</em>, and 2n=10 (4m+6sm) for <em>F. thomsonii</em>. Chromosome numbers of <em>F. eragrostis</em>, <em>F. fusca</em>, <em>F. insignis</em>, <em>F. pubisquama</em> and <em>F. thomsonii</em> are newly reported. The present study determined several karyotype asymmetry values. In addition, correlation between the karyotype asymmetry values were shown in this study. The dispersion diagram was found based on A1 and A2. The Stebbins categories of <em>Fimbristylis</em> investigated taxa were 3A, 4A and 4B.</p> 2019-07-11T15:46:27+07:00 ##submission.copyrightStatement## Gentiana bolavenensis (Gentianaceae), a new species from Dong Hua Sao National Protected Area in southern Laos 2019-07-19T13:34:59+07:00 Ai Nagahama Shuichiro Tagane Phetlasy Souladeth Anousone Sengthong Tetsukazu Yahara <p>A new species of <em>Gentiana</em>, <em>Gentiana bolavenensis</em> (Gentianaceae) is described from Dong Hua Sao National Protected Area in southern Laos, with photographs, a vernacular name and a preliminary conservation status.</p> 2019-07-19T13:34:58+07:00 ##submission.copyrightStatement## Two new species and one new record of Dichapetalum (Dichapetalaceae) in Thailand 2019-08-02T09:28:32+07:00 Shuichiro Tagane Sukid Ruengruea Hidetoshi Nagamasu Somran Suddee <p>Two new species and one new record of <em>Dichapetalum</em> (Dichapetalaceae) are reported for Thailand. <em>Dichapetalum</em> <em>khaoluangense</em> from Khao Luang National Park, Nakhon Si Thammarat Province and <em>D. ranongense</em> from Khlong Na Kha Wildlife Sanctuary, Ranong Province are described and illustrated. <em>Dichapetalum cambodianum</em> is recorded in Trat Province.</p> 2019-08-02T09:28:31+07:00 ##submission.copyrightStatement##