N. Vietnam, prov. Cao Bang, distr. Bao Lac, municipality Dinh Phung, Man Lung ridge (N 22°47′ E 105°49′). Primary very wet cloud evergreen closed mixed forest (with Podocarpus and Fokienia) along tops of remnant karst limestone Man Lung ridge at 1550-1600 m elev. Creeping epiphyte fern with fronds up to 20 cm lg in shady wet place. Common.
CBL 1525 18 April 1999
International Botanical Expedition of the U.S.A. National Geographic Society (grant No 6300-98)