N. Vietnam, prov. Cao Bang, distr. Ha Lang, municipality Thanh Nhat (N 22°41′ E 106°40′), about 42 km to E from Cao Bang town. Primary open coniferous and mixed semideciduous forest along tops of remnant limestone ridge at 600 m alt. Epiphyte and terrestrial herb up to 1 m hg on steep slopes and on tops of ridge. Very common. Usual dominante of herb forest stratum.
CBL 730 27 Nov. 1998
International Botanical Expedition of the U.S.A. National Geographic Society (grant No 6300-98)