S. Vietnam, Prov. Lam Dong, distr. Lac Duong, municipalite Da Chay, vicinities Klong Lanh village, 31 km to NE from Dalat city. Open secondary swamp along stream in river valley at foothills of NW macroslope of Bi Dup mt system at 1450 m alt. (N 12° 08′, E 108° 39′). Herb up to 20 cm hg. Flowers white. Common. VH 3891 12.04.1997 International Botanical Expedition of the U.S.A. National Geographic Society (grant No 5803-96)