N. Vietnam, prov. Cao Bang, distr. Thach An, municipality Duc Xuan, (N 22°21′ E 106°27′), about 39 km to SSE from Cao Bang town. Primary broadleaved semideciduous forest on steep slopes near tops of remnant limestone ridge at 500 m alt. Epilite herb up to 40 cm hg in shadow place. Fruits brightly red. Common.
CBL 826 02 Dec. 1998
International Botanical Expedition of the U.S.A. National Geographic Society (grant No 6300-98)