S. Vietnam, Prov. Lam Dong, distr. Lac Duong, municipalite Da Chay in 33.5 km to NE from Dalat city. Closed primary broadleaved forest on W macroslope of Gia Rinh mt. ridge at 1600-1650 m alt. (N 12° 07′, E 108° 41′). Terrestrial fern on steep dry slopes. Common. VH 3681 04.04.1997 International Botanical Expedition of the U.S.A. National Geographic Society (grant No 5803-96)