S. Vietnam, Prov. Lam Dong, distr. Lac Duong, municipalite Da Chay, 40 km to NE from Dalat city. Closed primary very wet broadleaved forest along stream canyon on SW macroslope of Hon Giao mt. ridge at 1600-1700 m alt. (N 12° 11′, E 108° 43′). Woody grass up to 4-5 m hg. Very common. Usual dominante on open steep mt slopes at 1600-1650 m alt on SW ridge macroslope. VH 4388 26.04.1997 International Botanical Expedition of the U.S.A. National Geographic Society (grant No 5803-96)