N. Vietnam, prov. Lai Chau, distr. Sin Ho, municipality Ta Ngau about 30 km of Lai Chau town to the N (N 22°18′ E 103°15′). Secondary open wet mossy evergreen broadleaved forest with remnants of primary elements on shale alluvial foothills of remnant karst limestone ridge at elev. about 1550 m. Climbing shrub with shoots up to 5 m lg in open place. Common.
NTH 2791 25 May 1999
International Botanical Expedition of the U.S.A. National Geographic Society (grant No 6300-98)