云南铜壁关自然保护区种子植物区系初步研究

通过对铜壁关自然保护区的初步调查,统计出该区共有种子植物201科,1 202属,3 517种,其中包括911个中国特有种。在科的分布区类型构成上,热带分布科占总科数的74.67%,温带分布科占25.33%。从属一级分布区类型的统计分析来看,热带分布属占总属数的74.21%,而温带分布属只占25.79%;热带分布属中以亚洲热带分布属最多,占总属数的28.17%。分布区类型分析表明,该地区的植物区系具有热带亚洲区系的特点,属于古热带植物区和马来西亚亚区中的滇、缅、泰地区,进一步分析表明,此区系具热带北缘的性质。

A Preliminary Study on Flora of Spermatophyte in Tongbiguan Nature Reserve in Yunnan

The flora of the seed plants in Tongbiguan Nature Reserve is studied initially.There are 201 families,1 202 genera,and 3 517 species of seed plants recorded from Tongbiguan,including 911 species that are endemic to China.In the floristic composition of the seed plants,the families of tropical distribution make up 74.67% of the total family number,while those of temperate distribution make up 25.33%.The statistics of the genus areal-types shows that the genera of tropical distribution make up 74.21% of the total genus number,while those of temperate distribution contribute 25.79%.Furthermore,the genera of tropical Asian distribution contribute 28.17% of the total sum of the genera.High percent of tropical distribution elements show that this flora is obvious of tropical Asian characteristics,a part of Yunnan,Myanmar and Thailand region of Malaysian forest flora.Occurring in the northern margin of tropical Southeast Asia,the flora also shows characters of marginal tropics.