S. Vietnam, Prov. Lam Dong, 30 km to NE from Dalat city, distr. Lac Duong, municipalite Da Chay. Open wet secondary grassland along stream in river valley on W macroslope of Bi Dup mt system at 1500 m alt. (N 12° 08′, E 108° 39′). Prostrate herb. Flowers blue-lilac. Common. VH 3257 26.03.1997 International Botanical Expedition of the U.S.A. National Geographic Society (grant No 5803-96)