作为地理环境组成成分的植被,包括区系和群落两方面,其中植物区系也是环境诸成分相互作用长期发展的产物。根据植物区系成分进行分区,旨在反映一个地域的区系结构,阐明该地域的历史发展过程,为开发利用提供客观依据。

The present paper is a continuity of professor Wu Cheng-yi's work "The Regionaliza-tion of Chinese Flora". Based opon recent statistics and analysis of total spermatophytes in Xizang, 6 plant regions may be divided. They belong to 3 subkingdoms of 2 kingdoms. The south Himalaya slope of Xizang is a part of Malaysian subkingdom in Paleotropic king-dom.