Claoxylon langbiangense (Euphorbiaceae), a New Species from Southern Vietnam

A new species of Claoxylon (Euphorbiaceae), C. langbiangense, from Bidoup-Nui Ba National Park, Lam Dong Province, southern Vietnam, is described and illustrated. It resembles C. longifolium of Cam-bodia, NE India, Indonesia, Laos, Malaysia, Papua New Guinea, Thailand and Vietnam, but is distin-guished by its serrate-dentate leaf margin, larger staminate flowers and shorter pistillate inflorescences. A vernacular name, preliminary conservation status for the species, and a key to the species of Claoxylon in Vietnam is also provided.