九寨沟自然保护区蔷薇科植物区系特征研究

在对九寨沟自然保护区蔷薇科植物详细调查的基础上,对其亚科、属、种组成、分布区类型、区系特征等进行了统计和分析。结果表明:1.区内有蔷薇科植物4亚科、20属、97种;2.区内蔷薇科植物与外界物种的交流相对较少,在演化中处在比较原始的阶段;3.优势属明显,植物区系具明显的温带性质;4.植物区系起源古老;5.该区处在苹果属的重要演化地带内。

A FLORAL STUDY OF ROSACEAE AT JIUZHAIGOU NATURAL RESERVE OF CHINA

The plants of the Rosaceae family in the present flora at Jiuzhaigou Natural Reserve of China were investigated,and the composition of its subfamilies,genera and species was statistically analyzed.As a result,4 sub-families involving 20 genera and 97 species have been recorded.They seem to be relatively isolated and rarely communicate with the other members of the same family in the outside world.Therefore,they may be regarded as at a relatively primitive stage of evolution.The dominant genera are prominent and the members of the family show distinct temperate characteristics.This flora is of ancient origin.This area is located in an important evolutive region of Malus.