本种是在欧亚大陆的热带和温暖的地区里的广泛分布。
This species is very widely distributed in tropical and warm regions of the Old World.
云南既是东亚、东南亚和东喜马拉雅等植物区系的交汇区，又是欧亚大陆植物区系与赤道热带的唯一陆地交流通道；
Yunnan is the place where the floras of East Asia, SE Asia and East Himalayas meet, and the only land passage between the floras of Eu-Asian Continent and the equator ;
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