中文摘要：

根据多年的实地调查和前人研究资料对新疆阿尔泰山两河源自然保护区地衣的物种组成及区系地理特征进行了研究。结果表明：新疆阿尔泰山两河源自然保护区地衣种类丰富,共8目、29科、64属、201种,不完全地衣1属2种。其中含五种以上的大科共有11科,占总科数的37.93%,集中了该地区58.73%的属和80.81%的地衣种类。地衣的地理成分可划分为7类,包括温带成分（36.95%）,泛热带成分（0.99%）,中国特有种（16.26%）,世界广布成分（9.85%）,东亚成分（3.94%）,环北极成分（31.03%）,两极分布种（0.99%）。该地区地衣区系成分以北温带成分为主,带有东亚种类,中国特有种类较显。

英文摘要：

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.