S. Vietnam, Prov. Lam Dong, distr. Lac Duong, municipalite Da Chay, 35 km to NE from Dalat city. Open secondary swamp along stream in river valley on W macroslope of Gia Rich mt. ridge at 1450 m alt. (N 12° 09′, E 108° 41′). Herb up to 0.8 m hg. Flowers yellow. Not common. VH 3770 07.04.1997 International Botanical Expedition of the U.S.A. National Geographic Society (grant No 5803-96)