The Arjin Mountain National Nature Reserve Areas consist of 260 plant species belonging to 31 families and 108 genera,among which the dominant species are in the order of Gramineae Cruciferae,leguminosae,Compositae and Cyperaceae and so on According to the analysis of the plant species in the reservation areas,the elements of the Qinghai Tibet flora or those of the Pamirs Qinghai Tibet Central Asia alpine flora occupy a dominant place among the plants The proportion of the younger plant elements is ge...