FLORA OF VIETNAM. Rhododendron sp. S. Vietnam, Prov. Khanh Hoa, distr. Khanh Son, 42 km to NE from Dalat. city. Primary closed broadleaved evergreen forest along bluffs. of giant waterfall in upper reaches of Lieng Ly river on E macroslope. of Hon Giao mt. ridge at 1300 m alt. (N 12° 12', E 108° 44'). Terrestrial and epilite on shadow wet stream rocky bluffs. Abundant. at 1100-1300 m alt. No VH 4294  24.04.1997. International Botanical Expedition of the U.S.A. National Geographic. Society (grant No 5803-96). . Collectors: L. Averyanov, N.Q. Binh, N.T. Hiep