A study on flora of spermatophyte of 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,while the temperate distribution makes 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,while the genera 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,apart from Yunnan,Myanmar and Thailand region of Malaysian forest flora.Occurred at the northern margin of tropical Southeast Asia,the flora also shows characters of marginal tropics.