S. Vietnam, Prov. Lam Dong, distr. Lac Duong, municipalite Da Chay, 35 km to NE from Dalat city. Closed secondary broadleaved mt forest on W macroslope of Gia Rinh mt. ridge at 1500-1600 m alt. (N 12° 09′, E 108° 41′). Vine about 3-4 m lg in open place. Flowers whitish. Common. VH 4044 18.04.1997 International Botanical Expedition of the U.S.A. National Geographic Society (grant No 5803-96)