滇中南无量山种子植物区系联系及其地位

无量山种子植物区系迄今为止含207科,1027属,2548种,极其丰富,通过对区系相似性系数、云南各自然小区的共有种频率以及中国特有属三方面的分析,把无量山置于东亚植物区的中国-喜马拉雅森林植物亚区的云南高原地区。

ON THE FLORISTIC RELATIONSHIPS AND POSITION OF SEED PLANTS IN MT. WULIANGSHAN

Mt. Wuliangshan, located in the south-central part of Yunnan Province, is floristically rich for 2 547 species in 1 027 genera and 207 families of seed plants. The relationships of the seed plants in the region were discussed in three respects. First, it was showed based on the generic similarity coefficients that the region is a floristic knot within East asiatic Flora, from north to south, or from east to west. Secondly, it was concluded in the light of percentage of the species shared with all the natural floristic subregions of Yunnan that it is in the center of the province which is floristically important in the East Asiatic Flora, and it is partial to Sino-Himalayan Subkingdom rather than Sino-Japanese one. Thirdly, it was a conclusion according to the analysis of the Chinese endemic genera in the region that it is a transition from the older flora in SE Yunnan to the younger one in NW Yunnan, and is a link between floristically tropical characteristics and temperate one. Through the analyses of many respects, this paper supports the retreatment in which the flora of Mt. Wuliangshan was put into the Yunnan Plateau Region of Sino-Himalayan Subkingdom, East Asiatic Kingdom.