Lichens floristic composition in Two-river Source Natural Reserve of Altay mountains,Xinjiang

In this paper the lichens species composition and eco-geographical characteristics in two-river source natural reserve of Altay mountains,Xinjiang were comparatively studied according to field investigation and literatures.The results show that there are 201 lichen species,belonging to 64 genera of 29 families.There are 11 major families which have more than 5 species,accounting for 58.73% genera and 80.81% species of the total taxa in this area.7 types of lichen flora in this region are identified,among them Temperate zone elements(36.95%),Pantropical element(0.09%),Endemic to China(16.26%),Cosmopolitan element(9.85%),East Asian element(3.94%),Circumpolar element(31.03%),Bipoliar species(0.99%).The species composition are complex,the north temperate elements including temperate zone and circumpolar elements play dominant role,and with east Asia elements at the same time including and there are significantly number of species endemic to China.