N. Vietnam, prov. Cao Bang, distr. Ha Lang, municipality Thang Loi, vicinities of Lung Sam village (N 22°45′ E 106°42′). Secondary wet evergreen broadleaved forest with remnants of primary elements on steep slopes and bluffs of karst remnant limestone ridge at 500-550 m elev. Treelet or shrub 2-2.5 m hg in shady wet place in deep canyon along stream. Flowers pink. Not common.
CBL 1656 23 April 1999
International Botanical Expedition of the U.S.A. National Geographic