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 evergreen forest on steep slopes and bluffs of limestone remnant karst ridge at 1100 m elev. Shrub up to 1.5 m hg. Flowers pink-violet, anthers yellow. Very common. Codominante of secondary shrubs all over the area.
CBL 1430 16 April 1999
International Botanical Expedition of the U.S.A. National Geographic Society (grant No 6300-98)