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We describe and illustrate two species of Manihot that occur in Caatinga (semiarid) vegetation in Brazil and redescribe and lectotypify M. quinquefolia Pohl, which was only known from a single collection made by J. E. B. Pohl in 1827. Manihot elongata P.Carvalho & M.Martins is widely distributed and Manihot alterniflora P.Carvalho & M.Martins is endangered because of its small populations...
Malpighiaceae is one of the major families of tropical and subtropical lianas, easily recognized in the field due to its remarkable flower conservatism. The family has been the subject of different phylogenetic studies over the past fifteen years, which have demonstrated the paraphyly of its subfamilies, most of its tribes, and some of its largest genera. Some of the most drastic changes have occurred...
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