S. Vietnam, Prov. Lam Dong, distr. Lac Duong, municipalite Da Chay, 35 km to NE from Dalat city. Old closed evergreen broadleaved secondary forest rich in primary elements along mt river on W macroslope of Bi Dup mt system at 1500 m alt. (N 12° 08′, E 108° 39′). Epiphyte on high trees. Flowers purple-violet. Not rare. VH 3216 26.03.1997 International Botanical Expedition of the U.S.A. National Geographic Society (grant No 5803-96)