Study on the flora of seed plants in Bajie Wetland Nature Reserve of Xizang, China

There are 132 species of wild seed plants in Bajie Wetland Nature Reserve of Xizang, China, which belong to 104 genera and 43 families. Among them, 2 families, 3 genera, 3 species belong to gymnosperms; 35 families, 82 genera, 102 species belong to dicotyledoneae and 6 families, 19 genera,27 species belong to monocotyledoneae. In the flora, the geographic distribution of seed plants in this area can be divided into 7 types, which comprise 66 genera of the temperate, 12 genera of the tropic and 26 genera of the cosmopolitan. Floristic analysis indicates that the flora of this area is poor. As its component, at the generic level the temperature and cosmopolitan elements, especially the medium or small ones, dominate. At the specific level there are rich endemic species and herbaceous species of different life forms. The study provides the information for the management and conservation of plant resources in this area and for the revision of "Flora of Xizang".