关键词: 中国被子植物区系, 区系间的联系, 被子植物起源

Abstract: On the basis of Wu's classification of distribution types of the Chinese seed plants,in which 3238 Chinese seed plant genera are classified into 15 types ad 34 subtypes,this paper discusses briefly the affinities between the Chinese flora and those of other regions of the world as well as the role of the CHinese flora in the origin of angiosperms.The main conclusions are summarized as follows:(1)The affinity with the flora of tropical Asian region;(2)The affinity with the flora of the Mediterranean region;(3)The affinity with the flora of central Asian region;(4)The affinity with flora of the European region(exluding the Mediterraneaen region);(5)The affinity with the flora of Australasia;(6)The affinity with the flora of tropical Africa;(7)The affinity with the flora of tropical America;(8)The affinity with the flora of North America;(9)Althought the role of the Chinese flora in the orgin of angiosperms has been a matter in dispute,undoubtedly there do exist many primitive families of angiosperms in the Chinese flora,such as the Eucommiaceae,Eupteleaceae,Cercidiphyllaceae and Tetracentraceae etc..Many linking groups,which connect different genera or different familes,also occur in the Chinese flora.

Key words: The Chinese flora of angiosperms, Floristic affinity, The origin of angiosperms