S. Vietnam, Prov. Lam Dong, 30 km to NE from Dalat city, distr. Lac Duong, municipalite Da Chay. Primary closed evergreen broadleaved forest on W macroslope of Bi Dup mt system at 1700-1900 m alt. (N 12° 08′, E 108° 39′). Terrestrial fern on open steep slope. Not common. VH 3170 24.03.1997 International Botanical Expedition of the U.S.A. National Geographic Society (grant No 5803-96)