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 fern 10-15 cm hg. Rare.
CBL 1519 18 April 1999
International Botanical Expedition of the U.S.A. National Geographic Society (grant No 6300-98)