O Clado Mimosoide (Fabaceae - Caesalpinoideae) na Mata do Buraquinho, João Pessoa, Paraíba – Brasil

Abstract

With about 80 genera and 3,200 species, the Mimosoide clade is distributed in the tropical, subtropical and temperate regions of the globe. Morphologically, it is characterized by its bipinnate and pinnate leaves, extrafloral nectaries, inflorescences like glomeruli and spikes, actinomorphic flowers, gamosepal calyx, gammopetal corolla and seeds with closed pleurogram. The present work had the objective of morphologically circumscribing the taxa of the group present in the Mata do Buraquinho, a remnant of Atlantic Forest located in João Pessoa - Paraíba, expanding the knowledge, diversity and distribution of the species, considering that the taxonomic knowledge of the Fabaceae family, especially the Mimosoide clade, for Atlantic Forest areas is still scarce. The study was based on samples collected in the field between August 2019 and March 2020 and the observation of the collection of the Herbarium Lauro Pires Xavier (JPB), in addition to image analysis available in the virtual Herbaria of REFLORA and SpeciesLink. Thus, an identification key, descriptions and comments were created for the species. In the study 23 species belonging to 14 genera were registered, with Mimosa (6 species) being the most representative genus. Finally, the information obtained from the taxonomic study of the Mimosoide clade provided a range of knowledge about the diversity and distribution of species that make up the vegetation of the Mata do Buraquinho, showing the high diversity and richness for the conservation area in the state of Paraíba.