S. Vietnam, Prov. Lam Dong, distr. Lac Duong, municipalite Da Chay, vicinities Klong Lanh village, 31 km to NE from Dalat city. Old open evergreen broadleaved secondary forest rich in primary elements along mt river on NW macroslope of Bi Dup mt system at 1450 m alt. (N 12° 08′, E 108° 39′). Prostrate herb on steep wet sandy shadow river slope. Flowers light pink-violet, central sepal with deep violet nerves. Not rare. VH 3888 12.04.1997 International Botanical Expedition of the U.S.A. National Geographic Society (grant No 5803-96)