浙江分布的中国种子植物特有属研究

Study on the Chinese Endemic Genera of Seed Plants Distributed in Zhejiang

浙江分布的中国种子植物特有属有４９属，含６３种，隶属于３０科，其中有３属为浙江特有属；在４９属中，单种属２９个，少种属１０个，多种属１０个；特有属的特征概括为：单种特有属的比例大，木本属占优势、具有相对的原始或古老性和珍稀濒危性以及具有明显的温带性质；浙西北山区，特别是西天目山是中国特有属在浙江的分布中心；浙江与全国各省区的共有属的关系为华东（４６属）＞华中（３６属）＞华南（３２）＞西北（１６属），而与东北和华北两地的关系很少有联系；浙江与毗邻省份的特有属相似性分析，其与江西和安徽的关系比与福建和江苏更为密切．

This paper deals with the study on Chinese endemic genera of seed plants distributed in Zhejiang. The results are summarized as follows: 1.There are 49 endemic genera (including 3 endemic genera of Zhejiang) of seed plants to China in Zhejiang province. Among them 29 genera are of monotypic, 10 genera are of oligotypic and 10 genera are of polytypic. 2.The characteristics of Chinese endemic genera of seed plants in Zhejiang province can be concluded as that:it has a large proportion of oligotypic and majority of woody plants, evident nature of temperate, and is ancient in origin, obviously rare and endangered. 3.The mountain in the northwest of Zhejiang, especially the West Tianmu Mountain is the centre of endemic genera of Chinese seed plants in Zhejiang. 4.Comparied with the abundance of Chinese endemic genera of seed plants among Zhejiang and neighbouring provinces, is Jiangxi>Anhui>Fujian>Jiangsu, and the similarity coefficient of genera indicates the closer relationship to that of Jiangxi and Anhui than to that of Fujian and Jiangsu. 5.Based on the statistics of common genera of Chinese endemic genera of seed plants between Zhejiang and some regions in China shows the closer relationship to that of E.China (46 genera) and C.China (36 genera) than to that of S.China (32 genera) and W.-S.China (32 genera) and W._N.China (16 genera) and minimum with N.China and E.-N.China.