四川分布的中国种子植物特有科属研究

对传统“特有”概念作了补充说明，确认四川有中国种子植物特有类群129属，12个特有科，在国产特有类群中占有较大比例。生活型虽然以草本为主，但高比例（近1／3）的木本类型以及木本类型多为原始的古特有成分却反映出植物区系的古老性和悠久发展历史。地理分布以盆地四周山地最丰富，西部高原和盆地中部缺乏或少有特有科、属。总体上可划分为3个分布中心区，包括西南区、东南区和东北区。新特有成分以西南区较多，而古特有成分大多集中中东南区和东北区。特有属与邻近地区的相似性还反映了四川植物区系和邻近地区植物区系的整体性。丰富的特有科、属同时也反映出四川种子植物区系的多样性。

On the Genera and Families of Spermatophyte Endemic to China in Sichuan Region

This paper gives a supplemental explain about the traditional concept of 'endemic plant' and a preliminary statistics of taxas of spermatophyte endemic to China in Sichuan region.The statistics shows that there are 129 endemic genera and 12 endemic families in this region,which is a high proportion of the endemic taxas of spermatophyte in China.Although a part of them is herbage,but there is a big proportion of woody life type which accounts for about one third of both types and belongs to the primitive paleoendemic components,it gives that the flora in Sichuan is very old and has a long history of its development.The endemic taxas are very rich in the mountain area around the basin and lack in the center of basin or the west plateau of Sichuan.The distribution of endemic taxas in Sichuan could be divided into three abundant areas:south-west,south-east and north-east regions.The south-west region has more tertiary endemics and others own more paleoendemics.The similarities of endemic genera between Sichuan and the adjacent areas imply the integrality of their flora,and its abundance reflects the biodiversity of the flora in Sichuan.