Monvillea is a genus of flowering plant in the cactus family Cactaceae, native to South America. The genus was established by Nathaniel Lord Britton and Joseph Nelson Rose in 1920.
Species , Plants of the World Online accepted the following species: Monvillea amazonica (K.Schum.) Britton & Rose Monvillea diffusa Britton & Rose Monvillea euchlora (F.A.C.Weber ex K.Schum.) Backeb. Monvillea jaenensis Rauh & Backeb. Monvillea saxicola (Morong) A.Berger Monvillea smithiana (Britton & Rose) Backeb.
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