A tropical montane rain forest was investigated in Mengsong, south-west to Jinghong City of Xishuangbanna region in the south of Yunnan near the border between China and Myanmar.

• 摘要西双版纳勐宋的热带山地雨林是一种东南亚热带山地雨林的北缘类型，它在植物区系组成上和群落学特徵上是介于热带雨林和南亚热带常绿阔叶林之间的热带山地常绿阔叶林。