Thesis (M.Sc.)--Chulalongkorn University, 2009

The investigation of diversity of mosses in Doi Inthanon National Park, Chiang Mai province, was carried out in two representative areas, namely Khew Mae Pan and Ang Ka, during July 2007-July 2008. In total, 810 specimens of mosses were collected, comprising of 101 species in 59 genera 27 families. The moss families with the highest species was Sematophyllaceae (16 species), followed by Fissidentaceae and Meteoriaceae (10 species). Most taxa found belong to Indochines flora elements while the rest are of common Asian flora with two are worldwide distributed. One species enlisted in the ICUN red list was also found, namely Distichophyllum carinatum Dixon & W. E. Nicholson. It had been found that as many as 16 species of mosses were new records to Thailand, namely Clastobryopsis brevinervis M. Fleisch.,Clastobryopsis planula (Mitt.) M. Fleisch. var. planula, Clastobryopsis planula var. delicata (M. Fleisch.) B. C. Tan & Y. Jia, Clastobryopsis robusta (Broth.) M. Fleisch., Didymodon maschalogena (Renauld & Car-dot) Broth., Distichophyllum carinatum Dixon & W. E. Nicholson, Distichophyllum collenchymatosum Cardot., Distichophyllum maibarae Besch., Distichophyllum wanianum B. C. Tan & P. J. Lin, Fissidens obscurus Mitt., Glossadelphus prostratus (Dozy & Molk.) M. Flesich., Meteorium subpolytrichum (Besch.) Broth., Oligotrichum obtusatum Mitt., Oligotrichum semilamellatum (Hook. F.) Mitt, Rhizomnium striatulum (Mitt.) T. J. Kop., and Warburgiella bistrumosa (Müll. Hal.) M. Fleisch. In addition, it is suggested that Warburgiella bistrumosa may have wilder geographic distribution, and may no longer be an endemic to the Philippines.