O genero Macroditassa (Apocynaceae-Asclepiadoideae) no Brasil

A taxonomic revision of the Brazilian species of the genus Macroditassa Malme (Apocynaceae-Asclepiadoideae) is presented. The genus belongs to the subfamily Asclepiadoideae R.Br. ex Burnett, tribe Asclepiadeae (R.Br.) Duby, subtribe Metastelmatinae Endl. ex Meisn. and is the most closely related to the Ditassa R.Br. genus. Macroditassa has 14 taxa of which 11 are found in Brazil, where they occurr in the Atlantic forest, disturbed areas, clearings and gullies, cerrado, cerradao, campo rupestre, campos (high-altitude savannas) and sandy coast plains (restingas). In this paper the identification key of the taxa, descriptions and illustrations, data on flowering and fruiting, as well as maps showing the geographic distribution are presented.