Gymnanthemum extensum, also known as bitterleaf tree, zhan zhi ban jiu ju, nan chao woei, is a species of flowering shrub of the family Asteraceae. It is an up to 8 m shrub or small tree found naturally growing at to above sea level in open forests or thickets in slopes, valleys and by the roadside.
Distribution
Southern China (Guizhou, Yunnan), the Himalayas (Sikkim, Nepal, Bhutan) and the Shan Hills (Myanmar, Thailand). It has been cultivated in Thailand as a garden tree for the medicinal properties of its leaves and the fragrance of its flowers.
References
External links
Thai Ministry of Agriculture plant information Chemical & Pharmaceutical Bulletin 40(2):553-555 · January 1992 - Structures of two new bitter principles isolated from a Thai Medicinal Plant, Vernonia Extensa D.C.