S. Vietnam, Prov. Lam Dong, 30 km to NE from Dalat city, distr. Lac Duong, municipalite Da Chay. Old open dry secondary coniferous forest with domination of Pinus kesiya on W macroslope of Bi Dup mt system at 1500 m alt. (N 12° 08′, E 108° 39′). Prostrate herb in wet places. Flowers lilac-purple. Common. VH 3247 26.03.1997 International Botanical Expedition of the U.S.A. National Geographic Society (grant No 5803-96)