N. Vietnam, prov. Cao Bang, distr. Tra Linh, municipality Quang Vinh (N 22°51′ E 106°14′), about 21 km from Cao Bang town to the N. Open secondary broadleaved forest with bamboos along tops of remnant limestone ridge at 800-850 m alt. Remnant tree up to 15 m hg (former dominante of extincted primary coniferous forest). Rare due to logging and forest fires.
CBL 994 09 Dec. 1998
International Botanical Expedition of the U.S.A. National Geographic Society (grant No 6300-98)