S. Vietnam, Prov. Lam Dong, distr. Lac Duong, municipalite Da Chay, 40 km to NE from Dalat city. Closed primary wet broadleaved forest on S macroslope of Hon Giao mt. ridge at 1600 m alt. (N 12° 11′, E 108° 43′). Epiphyte on high trees. Flowers yellowisj. Not common. VH 4137 21.04.1997 International Botanical Expedition of the U.S.A. National Geographic Society (grant No 5803-96)