N. Vietnam, prov. Cao Bang, distr. Bao Lac, municipality Ca Thanh, about 3 km to SW from Yen Lac village (N 22°44′ E 105°50′), about 42 km to NWW from Cao Bang town. Primary broadleaved and mixed semideciduous forest on steep slopes near the tops of limestone karst remnant ridge at 1300-1350 m alt. Tree about 3 m hg. Not common.
CBL 341 18 Nov. 1998
International Botanical Expedition of the U.S.A. National Geographic Society (grant No 6300-98)