Abstract: Exotic invasive species have long been known to bring about serious damages to ecosystem, which has imposed great threats to national eco-safety . Since the late 1990s, ecological impacts caused by Mikania micrantha H . B . K .,
an invasive plant species, have become the focus of different walks of society . No existing literature on M. micrantha , however , relates anything concerning its distribution in Yunnan Province . Based on field investigations and taxonomic
study on the specimen collected in Kunming Institute of Botany, the authers identified two species of Mikania Wild in Yunnan , namely M. cordata and M. micrantha . The present research also depicts the impacts of M. micrantha in Dehong, a pefecture in Southwestern Yunnan . Considering the biological features of the species , the author predicts there are possibilities of spreading of the species in Dehong prefecture , and possibly diffusing over other areas with identical climate patterns as Dehong . In the wake of this , it is highly advised that government departments and relative research institutes
pay great attention to the problem and take effective measures to deal with situation .

Key words: Yunnan

摘要： 外来入侵生物对生态系统产生的影响十分巨大, 已经成为国家生态安全的严重隐患。自上世纪90
年代末期以来, 入侵植物薇甘菊( Mikania micrantha H . B . K .) 在我国的生态危害引起了社会各界的广泛关注。但是, 至今我国所有关于薇甘菊的文献中, 均未提及该种在云南的分布。作者通过实地调查和查阅昆明植物研究所的相关标本, 确认云南分布有两种假泽兰属植物, 即假泽兰( Mikania cordata (Burm . f .) B . L . Robinson) 和薇甘菊( M. micrantha) , 并介绍了薇甘菊在云南西南部德宏州的危害现状。根据薇甘菊的生物学习性, 作者预测薇甘菊将进一步在德宏州扩散, 还可能入侵到与德宏州气候相似的其他地区,有关政府部门和研究机构对此问题应该给予高度重视。

关键词: 云南, 假泽兰属, 假泽兰, 薇甘菊, 外来入侵种FONT