S. Vietnam, Prov. Lam Dong, distr. Lac Duong, municipalite Da Chay, vicinities Klong Lanh village, 32 km to NNE from Dalat city (N 12° 08′, E 108° 39′). Open spring sphagnum swamp on high terrace of riwer
valley at the base of hills with old open Pinus kesiya forest at 1450 m alt. in 6-7 km from Bi Dup main peak to the W. Herb up to 1.2 m hg. Flowers white. Very common, especially in open wet places. Widely used as leaf wegetables. VH 3805 09.04.1997 International Botanical Expedition of the U.S.A. National Geographic Society (grant No 5803-96)