S. Vietnam, Prov. Lam Dong, distr. Lac Duong, municipalite Da Chay, 35 km to NE from Dalat city. Closed primary broadleaved mt forest along stream canyon on W macroslope of Gia Rinh mt. ridge at 1500 m alt. (N 12° 09′, E 108° 41′). Epilitic herb on wet stream rocks, sometimes in water. Common. VH 2874 19.03.1997 International Botanical Expedition of the U.S.A. National Geographic Society (grant No 5803-96)