A floristic study of the rare and endangered plants in Baimashan nature reserve

According to the Red Book of Chinese Plants (Vol.1) and the national important wild conservative plants list, there are 49 species of 44 genera in 37 families of the rare and endangered plants in Baimashan Nature Reserve. Among them ,there are 3 species of 3 genera in 3 families of Pteridophyta; 7 species of 6 genera in 6 families of Gymnosperm,taking up 39 species of 35 genera in 28 families of Angiosperm. 46.67% of all the rare and endangered plant species in Sichuan Province and 12.63% of such taxa in China. Classified in terms of growth types,there are 29 species of wooden and 20 species of herb. The rare and endangered plants in this area are characterized by ancient origin and the dominance of monotypic families and monotypic genera. The endemism to China is obvious, accounting for 22.73% of the total genera, and Baimashan Nature Reserve is an ideal basis for studying the ecological environment of Cathaya argyrophylla.