S. Vietnam, Prov. Lam Dong, distr. Lac Duong, municipalite Da Chay, 40 km to NE from Dalat city. Closed primary very wet broadleaved forest along stream canyon on SW macroslope of Hon Giao mt. ridge at 1600-1700 m alt. (N 12° 11′, E 108° 43′). Creeping epiphytic or epilitic vine 2-3 m lg in shadow wet places of deep stream canyon. Not rare. VH 4400 26.04.1997 International Botanical Expedition of the U.S.A. National Geographic Society (grant No 5803-96)