Flora Of Mosses In Lancanjiang River Valley (Yunlong-Deqin Section), Yunnan Province, China

Lancanjiang River Valley (Yunlong-Deqin Section) lies in the centre of "Three Parallel Rivers" where consists of differenet kinds of geographical zones, vegetations, habitats and rich biodiversity as well. Based on the detailed field surveys in October 2008, we studied the the moss diversity of this region for the first time, and analyse its phytogeographical nature, identify the affinities with different regions, and discuss the relationship between the habitats and diversity. The major results are as follows:(1) Two hundred thirty-five species (including subspecies and varieties) in 32 families and 103 genera were recognized from Lancanjiang River Valley (Yunlong-Deqin section), among them 19 species and 2 genera are new to Yunnan province.(2) Temperate element and East-Asian element are the two commonest elements, accounting for 26% and 25.5% of the total flora respectively. The biggest families with more than 12 species are Pottiaceae, Bryaceae, Hypnaceae, Brachytheciaceae, Dicranaceae, Meteoriaceae, Polytrichaceae and Grimmiaceae which consist of 27,17,16,16,15,13,12 and 12 species, respectively. The biggest genera with more than 6 species are Brachythecimen, Entodon, Grimmia, Plagiomnium, Bryum and Philontis which includes 11,9,8,7,6 and 6 species, respectively.(3) Thirty species are endemic to China, which account for 12.8% of total species. Of which 7 species and 5 species are only found in southwest China and Yunnan Province. Those numers are relatively higher and imply that the moss flora of Lancanjiang River Valley (Yunlong-Deqin Section) is rather unique.(4) Detrended Correspondence Analysis was employed to analyse the moss flora affinities between Lancanjiang River Valley (Yunlong-Deqin section) and other 19 mountains in China. The result shows the the region of closest phytogeograhical affinity is Gutianshan, Zhejiang.(5) In terms of habitat preference,108 species of species are collected on rock,75 species on trunks and branches,42 species on soil,40 on humus, and 3 species on aquatic habitats, respectively. This reflects that the rock is the most important habitat.