S. Vietnam, Prov. Lam Dong, distr. Lac Duong, municipalite Da Chay, 40 km to NE from Dalat city. Closed primary very wet broadleaved forest along stream canyon on SW macroslope of Hon Giao mt. ridge at 1600-1700 m alt. (N 12° 11′, E 108° 43′). Terrestrial and epilitic fern with fronds up to 2 m lg on steep rocky slopes of deep stream canyon. Common at 1600-1700 m alt on SW ridge macroslope. VH 4392 26.04.1997 International Botanical Expedition of the U.S.A. National Geographic Society (grant No 5803-96)