N. Vietnam, prov. Cao Bang, distr. Ha Lang, municipality Dong Loan, vicinities of Ban Lung and Lung Phuc (N 22°46′ E 106°44′), about 50 km to E from Cao Bang town. Open primary mixed mossy semideciduous and coniferous forest along tops of limestone ridge at 650-700 m alt. Shrub or treelet up to 3 m hg. Common.
CBL 626 25 Nov. 1998
International Botanical Expedition of the U.S.A. National Geographic Society (grant No 6300-98)