N. Vietnam, prov. Cao Bang, distr. Tra Linh, municipality Quoc Toan, vicinities of Lung Tao village (N 22°45′ E 106°19′), about 12 km from Cao Bang town to the NNE. Primary semideciduous open broadleaved forest on steep slopes and bluffs of remnant limestone ridge at 600-800 m alt. Palm up to 1 m hg in open place. Very common on tops of ridges at 800-900 m alt. in open places. Codominante of shrub stratum in extinct open coniferous forests (with Pseudotsuga brevifolia) distributed along tops of ridges.
CBL 1238 14 Dec. 1998
International Botanical Expedition of the U.S.A. National Geographic Society (grant No 6300-98)
Collectors: N.T.Hiep, N.Q.Binh, P.K.Loc, N.X.Tam, Averyanov L.