S. Vietnam, Prov. Lam Dong, distr. Lac Duong, municipalite Da Chay, 35 km to NE from Dalat city. Closed primary broadleaved mt forest on W macroslope of Gia Rich mt. ridge at 1700 m alt. (N 12° 09′, E 108° 41′). Prostrate herb in wet places. Flowers light lilac-whitish. Common. VH 2801 18.03.1997 International Botanical Expedition of the U.S.A. National Geographic Society (grant No 5803-96)