Mascagnia is a genus in the Malpighiaceae, a family of about 75 genera of flowering plants in the order Malpighiales. The genus Mascagnia comprises about 45 species that occur in diverse habitats from northern Mexico and the Caribbean to northern Argentina and south-eastern Brazil. The correct name for the species often called Mascagnia macroptera in the horticulture trade is Callaeum macropterum; the names are not interchangeable. Most of the plants sold in the US under the names Callaeum macropterum and Mascagnia macroptera are actually Callaeum septentrionale. Species currently recognized