S. Vietnam, Prov. Ninh Thuan, distr. Ninh Son, municipalite Phuoc Binh, 37 km to NE from Dalat city. Closed primary very wet broadleaved mt forest along deep stream canyon Da Coi river at 1100 m alt. on E macroslope of Gia Rinh mt. ridge. (N 12° 06′, E 108° 43′). Creeping epiphytic vine up to 6 m lg. Common. VH 3544 02.04.1997 International Botanical Expedition of the U.S.A. National Geographic Society (grant No 5803-96)