Sahut Chantanaorrapint

Drepanolejeunea laciniata (Lejeuneaceae ), a new species from northern Thailand

Abstract Drepanolejeunea laciniata Qiong He et R.L. Zhu sp. nov., is described and illustrated from Doi Inthanon National Park, Chom Thong District, Chiang Mai Province, northern Thailand. It is similar to Drepanolejeunea pulla (Mitt.) Grolle and D. erecta (Steph.) Grolle, but differs mainly in its large leaf lobule that is 1/2–2/3 as long as the leaf lobe, the free lateral lobular margin proximal to the notch bordered by 9–13 rectangular cells, the obovate perianth with dense apical laciniae, and usual presence of median ocelli in the leaf lobe.

Bryophyte Studies in Thailand: Past, Present, and Future

Abstract The historical development of bryophyte studies in Thailand is reviewed. Two historical periods are distinguished: the first period, 1899–1977, during which collections were made and studies were carried out by foreign botanists/bryologists in the framework of expeditions and the Flora of Thailand project; and the second one, 1977 to the present day, in which bryophyte work has been done mainly by Thai bryologists. In total, two species of hornworts, 20 of liverworts, and 63 of mosses have been described as new to science based on collections from Thailand. Of these, 48 are hitherto only known from Thailand and may be considered endemic to the country. Future work should focus more on taxonomic treatments of individual genera although further area-based research is also necessary.

Thismia angustimitra (Thismiaceae), a new species from Thailand

A new species of the genus Thismia (Thismiaceae) from Thailand is described and illustrated

Thismia filiformis, a new species of Thismiaceae (formerly Burmanniaceae) from Thailand

SummaryThismia filiformis is described and illustrated as a new species from Khao Yai National Park, Thailand. The conservation status and affinities of the new species are discussed.

An Account of the Genus Lejeunea (Marchantiophyta: Lejeuneaceae) in Thailand, Including Seven Newly Recorded Species

Abstract An account of the Lejeunea species of Thailand with their distributional ranges in Thailand and worldwide is presented. Seven species are newly recorded to Thailand: Lejeunea cocoes Mitt., L. lumbricoides (Nees) Nees, L. micholitzii Mizut., L. parva (S.Hatt.) Mizut., L. patersonii (Steph.) Steph., L. tamaspocsii G.E.Lee and L. umbilicata (Nees) Nees. Illustrations of the newly recorded species and a map of the provinces of Thailand with numbers of Lejeunea species recorded are also provided.

Drepanolejeunea actinogyna (Lejeuneaceae), a new species from southern Thailand

Abstract The new species, Drepanolejeunea actinogyna J. Inuthai, R. L. Zhu & Chantanaorr., is described and illustrated from southern Thailand. The new species belongs in the subgenus Pristolejeunea Grolle because of the presence of median ocelli in the leaf lobe. It is closely related to D. thwaitesiana (Mitt.) Steph. and D. nymanii Steph., but differs in the smaller plant size, the radially-symmetric perianth with triangular wings equal in size and a 2–3 cells long beak of the perianth, the free lateral margin of leaf lobule proximal to the notch bordered by 4 rectangular cells, and the curved tooth of the lobule.

The Epiphyllous Radula (Radulaceae, Marchantiophyta) in Thailand, with the Description of Radula grandilobula sp. nov.

Abstract A taxonomic review of the epiphyllous taxa of the genus Radula Dumort. in Thailand is presented, based on herbarium specimens and field surveys. Nine species are recognized, including two new records, R. nymanii Steph. and R. stenocalyx Mont. One new species, R. grandilobula Promma et Chantanaorr., is described and illustrated. The new species is characterized by the leaf-lobe subtriangular-ovate to falcate-ovate with a narrowly rounded to obtuse apex; the leaf-lobule falcate-ovate, upper half broadly extended, free margin recurved, apex strongly turning away from the stem; and the discoid gemmae occurring perpendicularly on ventral surface of leaf-lobes. A key to species, brief descriptions and illustrations are provided; ecology and geographical distribution of the species are also noted.

Taxonomic Studies on Thai Anthocerotophyta II. The Genus Notothylas (Notothyladaceae)

Abstract The genus Notothylas Sull. in Thailand is reviewed, based on herbarium specimens and field surveys. Eight species of the genus are recognized and two of them, N. pandei Udar et V. Chandra and N. yunannensis T. Peng et R.L. Zhu, are newly recorded in the country. The new species Notothylas frahmii Chantanaorr. is described and illustrated. A key to species, brief descriptions and selected illustrations for the species of Notothylas of Thailand are provided.

The Genus Plagiochasma (Aytoniaceae, Marchantiopsida) in Thailand

Abstract The genus Plagiochasma Lehm, et Lindenb. in Thailand is reviewed, based on herbarium specimens and especially on recently collections. The genus is reported for the first time from Thailand. Two species are recognized, namely P. appendiculatum Lehm, et Lindenb. and P. cordatum Lehm, et Lindenb. Descriptions, illustrations, and a key to species are provided.

Lectotypification of Thismia arachnites (Thismiaceae), a mysterious species newly reported for Thailand

SummaryThismia arachnites Ridl., previously known only from Perak, Malaysia, is newly reported in tropical lowland forest in south-eastern and peninsular Thailand. A detailed description and photographs are provided. In addition, a lectotype is also designated here.