Marsdenia is a genus of plants in the family Apocynaceae first described as a genus in 1810.Brown, Robert. 1810. Prodromus Florae Novae Hollandiae 460. in Latin It is named in honor of the plant collector and Secretary of the Admiralty, William Marsden.Les Robinson - Field Guide to the Native Plants of Sydney, page 327 The plants are native to tropical regions in Asia, Africa, Australia, and the Americas.Flora of China Vol. 16 Page 243 牛奶菜属 niu nai cai shu Marsdenia R. Brown, Prodr. 460. 1810. Davidse, G., M. Sousa Sánchez, S. Knapp & F. Chiang Cabrera. 2009. Cucurbitaceae a Polemoniaceae. 4(1): i–xvi, 1–855. In G. Davidse, M. Sousa Sánchez, S. Knapp & F. Chiang Cabrera (eds.) Flora Mesoamericana. Universidad Nacional Autónoma de México, México D.F.Forzza, R. C. 2010. Lista de espécies Flora do Brasil . Jardim Botânico do Rio de Janeiro, Rio de JaneiroNasir, E. & S. I. Ali (eds). 1980-2005. Flora of Pakistan Univ. of Karachi, Karachi
Species , Plants of the World Online accepted the following 69 species:
Former species Species transferred to other genera (such as Anisopus, Blepharodon, Cionura, Cynanchum, Dischidanthus, Dischidia, Gongronema, Gymnema, Jasminanthes, Leichhardtia, Lygisma, Matelea, Pergularia, Sarcolobus, Secamonopsis, Sinomarsdenia, Sinomenium, Stephanotis, Stigmatorhynchus, and Vincetoxicum) include:
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