中文摘要：

西双版纳是世界生物学多样性保护的关键和热点地区,倍受国际学术界的关注。笔者依据30多年来对西双版纳植被的调查,结合植物群落生态学与植物区系地理学研究,并参考世界类似热带植被的研究成果,对西双版纳植被的分类、物种组成、群落生态表现和植物区系特征等作了系统探讨,还进一步分析比较了其与世界类似热带森林植被的关系。结果显示,西双版纳的森林植被共包括32个较为典型的群系,且分属于7个主要的植被型,即热带雨林、热带季节性湿润林、热带季雨林、热带山地（低山）常绿阔叶林、热带棕榈林、暖热性针叶林和竹林。本文对西双版纳植被进行的全面记录和系统归纳,可为科学研究、生物多样性保护和自然保护区的管理提供参考。

英文摘要：

Xishuangbanna in southern Yunnan is a global biodiversity hotspot. Based on physiognomic and ecological characteristics,floristic composition and habitats,the primary forest vegetation in Xishuangbanna can be categorized into seven main vegetation types and thirty-two formations：tropical rainforest,tropical seasonal moist forest,tropical monsoon forest,tropical lower montane evergreen broad-leaved forest,topical palm forest,tropical coniferous forest and bamboo forest.Due to conspicuous similarity in regards to ecological and floristic characteristics,the tropical rainforest in Xishuangbanna is a type of tropical Asian rainforest.The monsoon forest in Xishuangbanna is a tropical deciduous forest under the influence of a strong monsoon climate and is considered a transitional vegetation type between tropical rainforest and savanna in physiognomy and distribution.The tropical montane evergreen broad-leaved forest is the main montane vegetation type in the region.It is considered a distinct vegetation type from the northern margin of mainland southeastern Asia,controlled by a strong seasonal climate,based on its floristic and physiognomic characteristics.This article is a synthetic study on the vegetation of Xishuangbanna and the aim is to provide a reference for scientific research, biodiversity conservation and nature reserve management.