S. Vietnam, Prov. Lam Dong, distr. Lac Duong, municipalite Da Chay, 32.5 km to NE from Dalat city (N 12° 07′, E 108° 41′). Very wet closed primary broadleaved mt forest along deep shadow stream canyon on NNW macroslope of Bi Dup mt system at 1800-1900 m alt. Epiphyte on mossy stems of old trees. Flowers pale greenish. Not common. VH 3328 28.03.1997 International Botanical Expedition of the U.S.A. National Geographic Society (grant No 5803-96)