Heterostemma is a genus of plants in the family Apocynaceae, first described in 1834.Wight, Robert. 1834. Contributions to the Botany of India 42 It is native to India, China, Taiwan, Southeast Asia, Australia, and certain islands in the Pacific.TropicosFlora of China Vol. 16 Page 263 醉魂藤属 zui hun teng shu Heterostemma Wight & Arnott in Wight, Contr. Bot. India. 42. 1834. Forster, P. I. 1992. A taxonomic revision of Heterostemma Wight & Arn. (Asclepiadaceae: Stapelieae) in Australia and the West Pacific. Australian Systematic Botany 5: 71–80.
Species 45 species are currently accepted:
References