N. Vietnam, prov. Cao Bang, distr. Nguyen Binh, municipality Ca Thanh (N 22°44′ E 105°50′). Primary semideciduous broad-leaved forest on steep slopes and bluffs of remnant karst limestone ridge at 1250-1300
m elev. Shrublet up to 1.5 m hg. in open place. Flowers pinkish-yellow, young leaves red-purple. Very common.
CBL 1265 13 April 1999
International Botanical Expedition of the U.S.A. National Geographic Society (grant No 6300-98)