S. Vietnam, Prov. Lam Dong, distr. Lac Duong, municipalite Da Chay, 35 km to NE from Dalat city. Closed primary broadleaved mt forest on W macroslope of Gia Rinh mt. ridge at 1600 m alt. (N 12° 09′, E 108° 41′). Terrestrial fern on shadow canyon slopes along stream. Very rare. VH 3749 07.04.1997 International Botanical Expedition of the U.S.A. National Geographic Society (grant No 5803-96)