S. Vietnam, Prov. Lam Dong, distr. Lac Duong, municipalite Da Chay, 35 km to NE from Dalat city. Old closed evergreen broadleaved secondary forest rich in primary elements along mt river on W macroslope of Bi Dup mt system at 1500 m alt (N 12° 08′, E 108° 39′). Woody vine up to 10 m lg. Flowers yellowish-grey. Common. VH 3202 26.03.1997
International Botanical Expedition of the U.S.A. National Geographic Society (grant No 5803-96)