S. Vietnam, Prov. Khanh Hoa, distr. Khanh Son, 41 km to NE from Dalat city. Closed primary wet broadleaved cloud forest on E macroslope of Hon Giao mt. ridge at 1500-1600 m alt. (N 12° 11′, E 108° 43′). Terrestrial and epilite herb up to 0.3 m hg in shadow places. Flowers white. Common. VH 4160 22.04.1997 International Botanical Expedition of the U.S.A. National Geographic Society (grant No 5803-96)