S. Vietnam, Prov. Lam Dong, distr. Lac Duong, municipalite Da Chay, 29 km to NEE from Dalat city. Open wet grassland in river valley slope along stream on W macroslope of Bi Dup mt system at 1450 m alt. (N 12° 08′, E 108° 39′). Herb up to 1.8 m hg in open wet place. Flowers white, specific smelled, central petal with lemon center, anthers yellow. Very common. VH 3993 16.04.1997 International Botanical Expedition of the U.S.A. National Geographic Society (grant No 5803-96)