S. Vietnam, Prov. Ninh Thuan, distr. Ninh Son, municipalite Phuoc Binh in 34 km to NE from Dalat city. Closed primary broadleaved forest along mt ridge between Bi Dup and Gia Rinh mt. mt at 1800-1900 m alt. (N 12° 07′, E 108° 42′). Epiphyte. Flowers white, lip brownish-purple. Very common. VH 3631 03.04.1997 International Botanical Expedition of the U.S.A. National Geographic Society (grant No 5803-96)