S. Vietnam, Prov. Lam Dong, distr. Lac Duong, municipalite Da Chay, vicinities Klong Lanh village, 31 km to NE from Dalat city. Old open dry secondary coniferous forest with domination of Pinus kesiya on W macroslope of Bi Dup mt system at 1450 m alt. (N 12° 08′, E 108° 39′). Prostrate herb in wet places. Flowers light violet with purple-violet nerves. Common. VH 3479 31.03.1997 International Botanical Expedition of the U.S.A. National Geographic Society (grant No 5803-96)