S. Vietnam, Prov. Lam Dong, distr. Lac Duong, municipalite Da Chay, vicinities Klong Lanh village, 31 km to NE from Dalat city (N 12° 08′, E 108° 39′). Secondary grasslands and shrub associations on river valley at foothills of W macroslope of Bi Dup mt system at 1450-1500 m alt. Herb up to 0.5 m hg in open wet place. Flowers white. Common. Common weed. VH 3908 13.04.1997 International Botanical Expedition of the U.S.A. National Geographic Society (grant No 5803-96)