S. Vietnam, Prov. Lam Dong, distr. Lac Duong, municipalite Da Chay and Prov. Khanh Hoa, distr. Khanh Son boundary region, 41 km to NE from Dalat city. Primary closed broadleaved cloud forest along Nui Hon Giao ridge at 1900 m alt. (N 12° 11′, E 108° 43′). Epiphyte on high trees. Flowers white. Not common. VH 4184 23.04.1997 International Botanical Expedition of the U.S.A. National Geographic Society (grant No 5803-96)