N. Vietnam, prov. Cao Bang, distr. Bao Lac, municipality Dinh Phung, Man Lung ridge (N 22°47′ E 105°49′). Secondary mossy short tall grasslands on alluvial foothills of remnant karst limestone Man Lung ridge at 1400-1450 m elev. Terrestrial herb up to 0.6 m hg among limestone rocks. Flowers yellow. Common.
CBL 1486 18 April 1999
International Botanical Expedition of the U.S.A. National Geographic Society (grant No 6300-98)