关键词: 锦鸡儿属, 分布区关系, 数值分析, 起源与演化

Abstract: The analytic biogeographic methods, including the Component analysis, Cluster analy-sis and Minimum Spanning Tree, are employed to treat the area relationships of the genus Caragana. The distribution region of Caragana is divided into thirteen areal types according to the floristic regionalizations of Wu and Takhtajan. Seventy-two species and twelve series occurring in the areas are regarded as disribution characters. East Asia and Tethys are classified into two groups. The former includes Far East- Northeast China, North China- Qinling mountain, Hengduan mountain, Himalayas and East Asia subtropic areas, in addition to Mongolia plateau. The two areas, i.e. Far East-Northeast China and Altai-Sayan have a close relationship. Based on the area cladograms, the evolutionary directions of the areas may be considered from Far East -Northeast China in East Asia and from Altai-Sayan in other areas.

Key words: Caragana, Area relationships, Numerical analysis, Origin and evolution