S. Vietnam, Prov. Lam Dong, distr. Lac Duong, municipalite Da Chay, 35 km to NE from Dalat city. Secondary open swamp along stream valley on NW macroslope of Bi Dup mt system at 1450 m alt. (N 12° 08′, E 108° 39′). Herb up to 0.5 m hg. Common. VH 2901 19.03.1997 International Botanical Expedition of the U.S.A. National Geographic Society (grant No 5803-96)