S. Vietnam, Kontum Prov., Kon Plong Distr., Hieu Municipality, Mang La forest enterprise (14°39′N, 108°25′E). Primary broad-leaved closed evergreen wet mountain forest on sandstone steep slopes of forest river at elev. 1100-1200 m. Woody vine up to 10 m lg. Flowers white. Not common.
VH 5656 24.04.2000
International Botanical Expedition of the U.S.A. National Geographic Society (grant No 6383-98)