S. Vietnam, Dak Lac Prov., Krong Bong Distr., Cu Pui Municipality, elevation from Dak Tour village (12°30′N, 108°30′E) to main peak of Chu Yang Sinh mt system (12°24′N, 108°26′E) along Dak Tour river (N slope). Primary closed mountain broad-leaved evergreen forest on very steep granite slopes along river canyon at elev. 1400 m. Climbing shrub or woody vine 4-5 m lg on open steep river side slope. Flowers white. Common.
VH 6395 12.05.2000
International Botanical Expedition of the U.S.A. National Geographic Society (grant No 6383-98)