N. Vietnam, prov. Cao Bang, distr. Bao Lac, municipality Dinh Phung, Man Lung ridge (N 22°47′ E 105°49′). Secondary wet closed broadleaved evergreen forest on shale alluvial foothills of remnant karst limestone Man Lung ridge at 1400-1450 m elev. Woody vine 6-8 m lg in open place. Not common.
CBL 1501 18 April 1999
International Botanical Expedition of the U.S.A. National Geographic Society (grant No 6300-98)