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

摘要:

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2 080种, 其中，裸子植物3科4属8种；被子植物166科835属2 072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。

Abstract:

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).