Benoistia is a genus of shrubs or trees of the spurge family (Euphorbiaceae) and the monotypic subtribe Benoistiinae. It was first described as a genus in 1939. The entire genus is endemic to Madagascar. It is dioecious.SpeciesBenoistia orientalis Radcl.-Sm. - N + E Madagascar Benoistia perrieri H.Perrier & Leandri - Madagascar Benoistia sambiranensis H.Perrier & Leandri - N Madagascar