Characteristics of Vegetation of the Alpine Frigid Zone in Shergyla Mountain,Xizang

Based on the documentation and investigation of plant resources,species richness and species composition of the alpine frigid zone in Shergyla Mountain,have been systemically analyzed in this paper.The results show:there are 33 families,103 genera and 285 species in seed plants of the alpine frigid zone in Shergyla Mountain.Among them there are 26 families,77 genera and 236 species of Dicotyledon and there are 1 families,1 genera and 4 species of Gymnospermae,and 44.01% species are endemic in China including 18.66% endemic to Xizang.There are 239 herb species including 230 perennial herbs or 83.86% species belong to the herbs.The flora components,life-form spectrum and leaf characters shows their typical temperate character.