N. Vietnam, prov. Cao Bang, distr. Bao Lac, municipality Yen Lac, vicinities of Yen Lac village (N 22°44′ E 105°50′). Secondary open broadleaved forest on alluvial foothills of remnant karst limestone ridges at 1050-1100 m elev. Climbing shrub up to 3 m hg on open rocks. Flowers pink. Very common. Usual codominante of secondary shrubs all over the area.
CBL 1353 14 April 1999
International Botanical Expedition of the U.S.A. National Geographic Society (grant No 6300-98)