中国西南地区珍稀濒危及国家保护植物区系地理

根据《中国植物红皮书》(第一册)和1999年《国家重点保护野生植物名录(第一批)》,对分布于中国西南地区的珍稀濒危及国家保护植物进行了调查和统计分析,并探讨了其区系成分特点及地理分布特征,结果表明:西南地区有珍稀濒危及国家保护植物共计95科195属275种;其植物区系具有明显的热带亚热带性质,种子植物热带分布型的属数占总数的48.57%,热带分布型的科数占总数的46.91%;特有性强,共有52种中国特有植物;起源古老,有41种古老孑遗植物;此外,这些种的地理分布不均匀,主要集中分布在省与省或国与国交界的边境地区以及中、低山地区。

Studies on floristic of the rare and endangered plants and national conservative plants in SW China

Base on the Red Book of Chinese Plants(Vol.1)and the National Important Wild Conservative Plants List (List 1),we studied the floristic elements and the geographical distribution of the rare and endangered plants and national conservative plants in SW China. The results indicates that there are 275 species belonging to 195 genera and 95 families of rare and endangered plants and national conservative plants in SW China. The floristic elements have obvious tropical and subtropical characters,the number of tropical distribution genera accounts 48.57% of the total genera of the seed plant,and tropical distribution family accounts 46.91% of the total. There are 41 species of relic plants and 52 species of Chinese endemic plants. Furthermore,these plants have obvious uneven geographical distribution,and they mostly distribute in the national & provincial adjacent areas and lower to middle mountains.