S. Vietnam, Dak Lac Prov., Krong Bong Distr., Krong Kmar waterfall, N slope of Chu Yang Sinh mt system (12°29′N, 108°20′E). Remnants of primary evergreen dry broad-leaved forest on granite outcrops at elev. 400-450 m. Herb vine 3-4 m lg in open rocks. Flowers deep brown with yellow internal tepals. Not rare.
VH 5864 01.05.2000
International Botanical Expedition of the U.S.A. National Geographic Society (grant No 6383-98)