N. Vietnam, prov. Cao Bang, distr. Tra Linh, municipality Luu Ngoc, vicinities of Lung Mu village (N 22°47′ E 106°18′), about 14 km from Cao Bang town to the N. Secondary shrubs and grasslands on alluvial valley between remnant limestone ridges and mesas at 600-650 m alt. Terrestrial herb up to 30 cm hg in open wet place between limestone rocks. Flowers yellow. Not common.
CBL 1173 13 Dec. 1998
International Botanical Expedition of the U.S.A. National Geographic Society (grant No 6300-98)