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 Hon Giao mt. ridge at 1800-2000 m alt. (N 12° 11′, E 108° 43′). Parasitic ahrub up to 2 m hg. Flowers reddish-purple. Not common. VH 4143 21.04.1997 International Botanical Expedition of the U.S.A. National Geographic