Apocynaceae Gymnema ? sp. Thai Nguyen Prov., Dong Hy Distr., Tan Long Mun., Mo Ba vill., around point 21?46′34″ N, 105?53′11″ E, 252 m a.s.l.
Occasionnally clustered in rather open and wet places of heavily logged closed evergreen broad-leaved lowland forests on slopes of limestone mountains. Small herbaceous vine, up to 5-7 m tall; flowers greenish. HAL 9078 22 Aug 2006 Collectors: Phan Ke Loc, Nguyen Tien Vinh and Nguyen Sinh Khang
Collected with the financial support from NYBG, U.S.A.