N. Vietnam, prov. Cao Bang, distr. Thach An, municipality Thuy Hung, vicinities of Na Lit village (N 22°30′ E 106°27′), about 27 km to SE from Cao Bang town. Secondary closed evergreen broadleaved forest between remnant limestone ridges on alluvial valley along stream at about 100 m alt. Terrestrial herb up to 40 cm hg in open wet place. Flowers whitish. Common.
CBL 867 04 Dec. 1998
International Botanical Expedition of the U.S.A. National Geographic Society (grant No 6300-98)