N. Vietnam, prov. Cao Bang, distr. Thach An, municipality Trong Con, (N 22°21′ E 106°27′), about 39 km to SSE from Cao Bang town. Open secondary forest on shale alluvial foothills at about 300 m alt. Terrestrial caudex plant with leaves up to 3 m lg. Rare.
CBL 853 03 Dec. 1998
International Botanical Expedition of the U.S.A. National Geographic Society (grant No 6300-98)