S. Vietnam, Prov. Lam Dong, distr. Lac Duong, municipalite Da Chay, vicinities Klong Lanh village, 31 km to NE from Dalat city. Old open evergreen broadleaved secondary forest rich in primary elements along mt river on W macroslope of Bi Dup mt system at 1500-1550 m alt. (N 12° 08′, E 108° 39′). Woody vine about 6-8 m lg. Flowers light greenish. Not rare. VH 3919 13.04.1997 International Botanical Expedition of the U.S.A. National Geographic Society (grant No 5803-96)