N. Vietnam, prov. Cao Bang, distr. Bao Lac, municipality Dinh Phung, Nam Linh mt. (N 22°47′ E 105°49′). Old secondary broadleaved wet mossy forest on steep slopes and bluffs of remnant karst limestone Nam Linh ridge at 1450-1550 m alt. Tree about 15 m hg. Flowers yellowish-white. Not rare.
CBL 1423 15 April 1999
International Botanical Expedition of the U.S.A. National Geographic Society (grant No 6300-98)