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. Palm up to 1 m hg. Common codominante of the shrub forest stratum (also in primary forest formations along ridge tops).
CBL 997 09 Dec. 1998
International Botanical Expedition of the U.S.A. National Geographic Society (grant No 6300-98)