滇东南热带雨林种子植物区系的初步研究

A study on the flora of the seed plants of tropical rainforest of Southeast Yunnan

通过对滇东南地区热带雨林植被的初步调查 ,统计滇东南热带雨林种子植物区系有种子植物 119科 ,378属 ,6 73种 (包括变种和亚种 )。种子植物分布区类型组成是主产热带和亚热带的科占 82 .35% ;热带分布属占非世界属数的 93.87% ;典型热带分布种占总种数的 75.93%。热带分布属中以亚洲热带分布属最多 ,占非世界属数的 4 0 .2 7% ;典型热带分布种中以热带亚洲分布及其变型越南 (印度支那 )至云南 (华南 )分布占比例最高 ,分别为 71.4 7%和 16 .34 %。分布区类型分析表明滇东南热带雨林种子植物区系具有热带亚洲区系的特点 ,属于古热带植物区中的马来亚森林植物亚区之中的北部湾区系。进一步分析表明此区系具热带北缘的性质。分布区类型的组成也表明此区系古特有种丰富。

The flora of the seed plants in the tropical rainforest of Southeast Yunnan is studied initially. There are 119 families,378 genera,673 species of seed plants recorded from 15 plots of the tropical rainforest of Southeast Yunnan,including 155 species that are endemic to China. In the floristic composition of the forest,the families of mainly tropical and subtropical distribution make up 82.35% of total family;the genera of tropical distribution take up 93.87%;the species of tropical Asia distribution and its sub-patterns contribute 71.47% of total species. High percent of tropical distribution elements show that this flora is obvious of tropical Asian characteristics,a part of Tongking Gulf region of Malaysian forest flora. Occurred at the northern margin of tropical Southeast Asia,the forest flora also shows characters of marginal tropics.