New synonyms and lectotypifications in Sida (Malvaceae-Malveae) reveal the first record and extension of the distribution area of Sida maculata to Brazil

New synonyms and lectotypes in Sida sect. Cordifoliae (Malvaceae, Malveae) ) are proposed here and reveal the first record and extension of the distribution area of Sida maculata to the Brazilian semi-arid region. The species was first described in the 18th century for the Caribbean islands of Cuba and the Dominican Republic and for a long time was confused with S. cordifolia, , from which it is unquestionably distinct in its leaves, inflorescences and flowers. In Brazil, S. maculata is widely distributed from Maranh & atilde;o to the north of Minas Gerais and was identified for almost a century in herbaria and local floristic treatments as S. galheirensis. . Discussions and photographs of types of S. maculata and related taxa are presented, as well as an updated map of the species' geographical distribution.