元江自然保护区种子植物区系特有现象

据调查,元江自然保护区共有野生种子植物166科835属2 080种.其中东亚特有科3科,中国特有属7属,中国特有种632种,其中云南特有种198种(元江特有种9种).该区的科级特有现象表明,区系属于东亚植物区系的一部分;属的特有现象并不显著,却有古热带起源的假贝母属和巴豆藤属,表明了区系的古老性和热带渊源;保护区内的中国特有种在云南与滇南、滇西南以及滇东南关系密切,在全国南方与西南地区关系密切,在东亚地区与中国-喜马拉雅地区最接近.

The Endemism in the Flora of Seed Plants in Yuanjiang Nature Reserve

According to investigation statistics,there are 2 080 species in 835 genera and 166 families of wild seed plants in Yuanjiang Nature Reserve.Among them,there are 3 endemic families to East Asia,7 endemic genera and 632 species to China,in which there are 198 endemic species to Yunnan(including 9 species to Yuanjiang).The endemism in the familial rank indicates that the flora of this region belongs to the East-Asia flora;the endemism in general is not evident,but the appearance of Craspedolobium and Bolostemma which originated from palaeotropical region indicates that the flora of this region is ancient and tropical origin.The Chinese endemic species have close relation with Yunnan,southern Yunnan,southwestern Yunnan and southeastern Yunnan;and southern China and southwestern China;as well as the closest to Sino-himalaya in East-Asia.