黄耆属簇毛黄耆亚属生物地理学研究

簇毛黄耆亚属的种类主要沿亚洲的“山链”分布，即横断山，喜马拉雅，查谟和克什米尔，帕米尔—阿赖，兴都库什和苏莱曼山脉，表达了东亚、西亚和中亚的植物区系地理关系。本文基于亚属的分布式样，对其8个分布区进行了分析生物地理学中的成分分析。结果表明，这8个分布区可划分为4类，即1)华北—东北；2)横断山和西藏；3)西喜马拉雅，西巴基斯坦，塔吉克斯坦；4)内蒙古—新疆。在本亚属的分布式样中，有两个地理“结点”，即横断山和西喜马拉雅，后者主要指克什米尔。推断地理上的衍进方向是由东向西发展，喜马拉雅是连接东西分布的通道。

Biogeography of Astragalus Subgenus Pogonophace (Leguminosae)

The distribution of Astragalus subgenus Pogonophace, along the Asian mountain chains namely Hengduan Mountains, Himalayas, Jammu and Kashmir, Pamir Alai, Hindukush and Sulaiman, shows the floristic relationships of the East Asia, West Asia and Central Asia. On the basis of the phylogenetic analysis, the distribution pattern of Pogonophace was studied by means of COMPONENT analysis of the analytical biogeography. The eight distribution areas of Pogonophace were treated as the operational biogeographical units. The results indicated that the eight areas could be classified into four types, i.e., 1) North China Northeast China, 2) Hengduan Mountains and Xizang (Tibet), 3) Western Himalayas, Western Pakistan, and Middle Asia (Tajikistan), and 4) Inner Mongolia and Xinjiang belonging to Central Asia.Two phytogeographical nodes i.e. Hengduan Mountains and Western Himalayas ad hoc Kashmir were suggested. The area progressive direction was inferred to be from eastern to western distribution areas, and Himalayas was a corridor jointing the eastern and western distribution areas.