S. Vietnam, Prov. Lam Dong, distr. Lac Duong, municipalite Da Chay, 31 km to NE from Dalat city (N 12° 08′, E 108° 39′). Closed primary evergreen broadleaved mt forest on NNW macroslope of Bi Dup mt system at 1700-1800 m alt. Epiphyte on high trees. Flowers white, lip white with yellow center and purple-violet epichile and sidelobes, petals with purple marks. Abundant at 1500-2200 m alt. VH 4515 02.05.1997 International Botanical Expedition of the U.S.A. National Geographic Society (grant No 5803-96)
Collectors: L. Averyanov, N.Q. Binh, N.T. Hiep, P.K. Loc, P. Lowry