S. Vietnam, Prov. Lam Dong, distr. Lac Duong, municipalite Da Chay, 29 km to NEE from Dalat city. Old open evergreen broadleaved secondary forest rich in primary elements along mt river on W macroslope of Bi Dup mt system at 1450 m alt. (N 12° 08′, E 108° 39′). Epiphyte on old mossy trees over river. Flowers yellowish-orange, lip deep purple-brown. Abundant. VH 4018 16.04.1997 International Botanical Expedition of the U.S.A. National Geographic Society (grant No 5803-96)