云南省元江自然保护区种子植物区系研究

Studies on Floristics of Seed Plants in Yuanjiang Nature Reserve in Yunnan Province

在实地考察和标本采集鉴定的基础上,对云南省元江自然保护区种子植物的组成、分布区类型和区系特征等进行了分析。结果表明:保护区有种子植物166科835属2080种,其中,裸子植物3科4属8种;被子植物166科835属2072种;种子植物区系表现出热带向亚热带过渡,具有明显的热带性质;种子植物区系为东亚植物区系,隶属于中国-喜马拉雅植物亚区,起源上受热带亚洲植物区系影响很大;特有类型丰富,有东亚特有科3科,中国特有属5属,中国特有种647种。

The ＂Valley-Savanna vegetation＂ is a special type of vegetation in mountane dry-hot valleys of southwest China. It has a special position in China, even within Asia. The composition, areal-types and floristic characteristics of seed plants in Yuanjiang Nature Reserve of Yunnan Province were studied on the basis of field survey. The results showed that there were 2 080 species of seed plants, belonging to 166 families and 835 genera, among of them 8 species are gymnosperm belonging to 3 families and 4 genera, and 2 072 species are angiosperm belonging to 163 families, 831 genera. The floristics of seed plants of Yuanjiang Nature Reserve is a transitional flora from tropical to subtropical area and with evident characteristics of tropical flora. The flora belongs to Sino- Himalaya subkingdom, Eastern Asiatic Kingdom. It is influenced by tropical Asian flora in origin and very rich in endemism （3 families endemic to East Asia, 5 genera and 647 species endemic to China）.