关键词: 特有科属, 分布型, 间断和替代现象, 散布路线, 中国

Abstract: It is a high level endemism of chinese flora with 8 endemic families and 268 endemic genera.This paper deals with the distribution patterns based on their geographical distribution and the relationship with environrnents and the cartographic method.They are classified into 9 distribution patterns and 23 subpatterns,i. e. 1)S.China─S.Yunnan. 2)Yunnan Plateau─S.Yunnan,3)Hengduan Mts.─S.Xizang, 4) SW.China─C.China─E.China,5)SW.China─N.China, 6) C.China─E.China.7) N.China,8)Arid─region of NW.China and 9)Qinghai─Xizang plateau and have been made the statistics of number and the analysis are made.Various disjunctive and vicarious distribution phenomena are introduced in some genera or species endemic to China.3 basic characteristies of distribution patterns and main dispersal routes of endemic genera.i.e.(1).It is unequal in every region distributing mainly in the tropical and subtropical region of the south part of Qialing-Dabei Mts─Changjiang River and appearing 8 abundance centers.(2).It is radial dispersal from SW.China toward all directions and along several routes like to S.China─SE.China,C.China ─E.China,Northern China and S.Xizang.(3).There are various distribution forms as continued,disjunctive and vicarious areal.

Key words: endemic families and genera, distribution patterns, disjunctive and viearious Phenomena, dispersal routes, China