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.Perrier de la Bâthie, Joseph Marie Henry Alfred & Leandri, Jacques Désiré . 1939. Bulletin de la Société Botanique de France 85: 528.Tropicos, Benoistia H. Perrier & Leandri The entire genus is endemic to Madagascar.Kew World Checklist of Selected Plant FamiliesGovaerts, R., Frodin, D.G. & Radcliffe-Smith, A. (2000). World Checklist and Bibliography of Euphorbiaceae (and Pandaceae) 1-4: 1-1622. The Board of Trustees of the Royal Botanic Gardens, Kew. It is dioecious.
Species Benoistia orientalis Radcl.-Sm. - N + E Madagascar Benoistia perrieri H.Perrier & Leandri - Madagascar Benoistia sambiranensis H.Perrier & Leandri - N Madagascar
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