Study On Taxonomy And Flora Of Hypnaceae In Guizhou

Guizhou province blongs to plateau of Yunnan and Guizhou,and locates at 103°36′～109°35′E in longitude and 24°37′～29°13′in latitude.West hypsography is higher than east,The average elevation is about 1100 meters,92.5%areas is mountainous region and knap,Especially the rock dissolved hypsography is very typically;The weather is warm and moist,it's a subtropics moist monsoon weather area,air temperature varies,small,it's raining frequently and the raining season is obvious;the type of soil is red soil,yellow soil district of subtropics evergreen and broad-leaved forests,it's mainly yellow soli in central and eastern distriction,and the red soil is main type of soil in southwestern district,the northwest district is mainly brown soil.It's the special position of geography and weather condition in Guizhou conceived abundant resources of moss.the bryophytes toxonomy of Hypnaceae amounts to three subfamilies,about 60 generas, distributes many districtions in the world,it often grows on all kinds of soil,these three subfamilies all have represent species in our country,According to the taxonomic system of Chen Bang-jie, there are 115 species and 3 varities of mosses belonging to 24 genera and 3 subfamilies in China, among them,the unique generas of China are Microctedum and Leiodontium,there are 21 unique speciesof China..Taxonomic study on Hypnaceae of Guizhou has not been conducted untill the author engages in it.In total of 1500 packages of specimens have been collected there,based on these specimens, 82 species(subspecies and varities are included) of 16 genera are identified,among which,2 genera(Isopterygiopsis,Trachythecium) and 31 species are firstly reported in Guizhou province.In this paper,author describes all the new recorded generas and takes photoes of some species. Generas contained no less than 5 species are defined as predominant Genera.And there are 9 predominant Genera composes of the bryophytes of Hypnacea in Guizhou.According to "The areal-types of Chinese genera of seed plants" by Wu Zheng-yi,12 types of the bryoflora in this region are recongnized.Among them,The East Asian elements are the most important one with 31 species corresponding to 37.35%of the total,the North Temprate elements consist of 28 species corresponding to33.73%of the total.The third one is the Tropical Asian elements including 14 species sharing 16.87%of the total.As a word,the Temprate elements,the Tropical elements and the East Asian elements construct the main body of bryophytes in this region.Accoding to the analysis on genera and species relationship between the bryoflora of Guizhou and those of other provinces,the auther selected 24 provinces.to compare.The similarity coefficients of genera and species between Guizhou andYunnan,Sichuan,Tibet,Jiangxi and Shanxi are all more than 50%.The results show that the relation between the bryoflora of Guizhou and that of these provinces is the most closest.Accoding the comparation on rich correlation coefficient of Hypnaceae flora between Guizhou and other provinces,we can conclude that the rich correlation coefficient of Hypnaceae flora in country in first five province in turn is Guizhou,Yunnan,Sichuan Xizang,Jiangxi,among of them the richness of Guizhou is the first.