Vietnam, Ninh Thuan Prov., Nui Chua Nat. Park, Ninh Hai distr., Vinh Hai vill., on trail to Nui Chua peak, around point 11043′43′'N 109008′52′'E, at elev. 700-900 m a.s.l.
In closed primary evergreen submontane forest on steep granite slopes. Liane, up to more than 20-30 m long, dbh 0.3 m. Flowers whitish at first, later yellowish. Collectors: N.V. Trai, Q.D. Trong, N.Q. Hung, N.T.K. Thanh and T.N. Tuan. No: HLF 3530 Date: 05-04-2004 Plants collected with the financial support of Luce Foundation (USA)