S. Vietnam, Kontum Prov., Kon Plong Distr., Hieu Municipality, Mang La forest enterprise (14°39′N, 108°25′E). Primary evergreen broad-leaved wet forest on steep mt. slopes on sandstone & gneiss at elev. 1000-1200 m. Forb vine 3-4 m hg in open places along road. Flowers orange. Very common.
VH 5096 15.04.2000
International Botanical Expedition of the U.S.A. National Geographic Society (grant No 6383-98)