N. Vietnam, prov. Cao Bang, distr. Bao Lac, municipality Dinh Phung, about 5 km to NW from Yen Lac village (N 22°44′ E 105°50′), about 50 km to NWW from Cao Bang town. Secondary shrubs on shale alluvial foothills of limestone remnant ridge at 1300 m alt. Shrublet about 1.5 m hg in open place. Common.
CBL 516 19 Nov. 1998
International Botanical Expedition of the U.S.A. National Geographic Society (grant No 6300-98)