S. Vietnam, Prov. Lam Dong, distr. Lac Duong, municipalite Da Chay, 29 km to NE from Dalat city. Primary mixed cloud forest with Fokienia hodginsii on peaks of Bi Dup ridge at 2150 m alt. in 1.5 km to N from main peak of mt system (N 12° 06′, E 108° 39′). Herb vine 2-3 m lg in open steep rocky slopes and bluffs. Not common. Not common. VH 4458 01.05.1997 International Botanical Expedition of the U.S.A. National Geographic Society (grant No 5803-96)
Collectors: L. Averyanov, N.Q. Binh, N.T. Hiep, P.K. Loc, P. Lowry