S. Vietnam, Prov. Lam Dong, distr. Lac Duong, municipalite Da Chay, 32.5 km to NE from Dalat city. Closed primary broadleaved mt forest along very wet deep stream canyon on NNW macroslope of Bi Dup mt system in 6-7 km to NNW from main peak at 1600 m alt. (N 12° 07′, E 108° 41′). Terrestrial herb in open wet sandy places along mt stream. Not rare. VH 3410 30.03.1997 International Botanical Expedition of the U.S.A. National Geographic Society (grant No 5803-96)