Bryophytes diversity at the summit of Khao Luang, Huai Yang Waterfall National Park, Prachuap Khiri Khan Province

Bryophytes diversity at the summit of Khao Luang, Huai Yang Waterfall National Park. Prachaup Khiri Khan Province has been conducted from May 1999 to July 2002 at the elevation ranging from 1,000 to 1,200 meters above mean sea level. So far. 575 specimens were collected. They were classified into 81 species, 51 genera and 26 families, included 1 species of horn wort, 42 species of mosses and 38 species of liverworts (2 species of thalloid liverworts and 36 species of leafy liverworts). The common families are Lejeuniaceae, included 11 species in 7 genera, whilst Plagiochilaceae and Hypopterygiaceae included 7 and 6 species respectively. Of 81 collected species includes 44 epiphytes, 27 terrestrial and 10 species dwelling on two habitats. Also, there are 11 species which have not been recorded for Thailand: Aerobryopsis subdivergens (Broth.) Broth., Fissidens bogorensis Fleisch., Lejeunea discretea Lindenb., Plagiochila acanthophylla Gottsche subsp. japonica (Sande Lac.) Inoue, p. javanica (Sw.) Dumort., p. microdonta Mitt., p. yokogurensis Steph., Plagiochilion oppositus (Reinw., Blume et Nees) S. Hatt., Rhodobryum ontariense (Kindb.) Kindb., Spruceanthus semirepandus (Nees) Verd. and Symphyogynopsis filicum (Nadeaud) Grolle; and 1 species endemic to Thailand, namely Radula caduca Yamada. Full description of all species are given, key to families, genera and species for their identification are constructed, together with ecological data, their distributions. In addition, line drawings are also provided. The collected dry specimens are deposited at the Professor Kasin Suvathabhandu Herbarium, Department of Botany, Chulalongkorn University.