S. Vietnam, Prov. Ninh Thuan, distr. Ninh Son, municipalite Phuoc Binh, 37 km to NE from Dalat city. Very old open dry secondary grassy coniferous forest with domination of Pinus kesiya along ridge on E macroslope of Gia Rinh mt. mt at 1300-1400 m alt. (N 12° 06′, E 108° 43′). Epiphyte on Lyonia trees. Flowers pale yellowish. Common. VH 3535 02.04.1997 International Botanical Expedition of the U.S.A. National Geographic Society (grant No 5803-96)