S. Vietnam, Prov. Lam Dong, distr. Lac Duong, municipalite Da Chay, 40 km to NE from Dalat city. Closed primary very wet broadleaved forest along stream canyon on SW macroslope of Hon Giao mt. ridge at 1600-1700 m alt. (N 12° 11′, E 108° 43′). Terrestrial prostrate herb on shadow steep slopes of deep stream canyon. Flowers yellowish-white. Abundant. Common on SW ridge macroslope at 1600-1800 m alt. VH 4401 26.04.1997 International Botanical Expedition of the U.S.A. National Geographic Society (grant No 5803-96)