S. Vietnam, Prov. Lam Dong, distr. Lac Duong, municipalite Da Chay, vicinities Klong Lanh village, 31 km to NE from Dalat city. Closed evergreen broadleaved secondary forest rich in primary elements on river slopes on W macroslope of Bi Dup mt system at 1500-1550 m alt. (N 12° 08′, E 108° 39′). Woody vine about 10 m lg. Flowers white. Not rare. VH 3952 14.04.1997 International Botanical Expedition of the U.S.A. National Geographic Society (grant No 5803-96)