大巴山自然保护区种子植物中国特有属的初步研究

大巴山自然保护区分布中国特有属45属,占本区的种子植物总属的4.98%。本区分布的中国种子植物特有属中均为少种属或单种属,单种属22属,少种属23属,分别占本区中国特有属总属数的48.9% 和51.1%。木本属22属,草本属23属,分别占本区中国特有属总属数的48.9% 和51.1%。本区的中国特有属植物主要分布在低山和中山,其中分布在低山的有6属,占总属数的13.3%, 分布在中山的有39属,占总属数的86.7%。其特点表现为众多的古特有属、较明显的过渡性质和丰富的珍稀物种,与四川和湖北的共有成分最多,是中国特有属川东鄂西特有现象中心的重要组成部分。

Preliminary study on the endemic genera to China of spermatophyte in Dabashan Nature Reserve

endemic genera to China of Spermatophyte were found in Dabashan Nature Reserve of China. They are taking the proportion of 4.98 percent to all the Spermatophytic genera. They are divided into 22 monogenera and 23 minor-genera. And monogenera was proportion of 48.9 percent to the Spermatophytic genera.,and minor-genera was that of 51.1 percent respectively. Among these plants 22 woody plants and 23 herb plants could be defined , accounting for 48.9 and 51.1 percent to the overall genera in this area respectively. These endemic genera to China of Spermatophyte distributed over the lower and middle mountains. 6 genera in the lower mountain and 39 genera in the middle one , were taken the proportion of 13.3 and 87.6 percent to the overall genera plants respectively. They were taken as the numerous ancient endemic genera and obvious transitional nature and abundant threatened species, and were considered that many of them existed in Sichuan and Hubei provinces, and that were important characteristic plants in Chuandong and the west of Hubei endemic center.