贵州省重点保护植物区系成分分析

从科、属、种3个层次对贵州省珍稀濒危植物进行统计分析,结果表明:贵州省珍稀濒危植物区系起源古 老,区系成分复杂.其中国特有成分表现丰富,其中3种贵州省特有成分,即梵净山冷杉、辐花苣苔和贵州苏铁. 该区系成分表现出热带性质特征.珍稀濒危植物是以木本植物为主,而且高大乔木占绝大部分.该区系与西南地区 关系最密切,尤其是云南省,其次是华中、华南及华东地区.

A Floristic Study of Conservative Plants in Guizhou Province

Based on the red book of Chinese plants (Vol.1) and the list of national protected wild plants, there are 100 species of rare and endangered plants which belong to 48 families, 79 genera in Guizhou. From the statistics and analysis of the areal-types of family, genus and specie, the results indicate as follow: The rare and endangered plants in Guozhou show features of ancient origin and very complex in floristic elements. China-endemic species of rare and endangered plants in Guozhou are abundant. In additon, there are 3 endemic species to Guizhou province, i. e., Abies fanjingshanensis, Thamnocharis esquirolii and Cycas guizhouensis. The Tropical elements account for a great proportion, so the flora shows a tropical floristic feature. Most of the rare and endangered plants in Guizhou are trees, among which tall trees account for a huge proportion. The flora of the rare and endangered plants in Guizhou has the closest relationship with that of Southwest of China, especially with Yunnan. The two provinces share 60 species in common, 60.0% of overall species.