Clado Mimosoide (Leguminosae-Caesalpinioideae) no Parque Estadual Mata da Pimenteira, Semiárido de Pernambuco, Brasil

Abstract

This work consists of a floristic-taxonomic study of the Mimosoid clade (Leguminosae - Caesalpinioideae), carried out in Mata da Pimenteira State Park, the first Conservation Unit in the state of Pernambuco, located in the municipality of Serra Talhada. The collections were monthly and executed during the period from March 2015 to March 2016. There were 14 species distributed in nine genera: Anadenanthera colubrina, Chloroleucon dumosum, Desmanthus pernambucanus, Enterolobium timbouva, Mimosa arenosa var. arenosa, M. candollei, M. ophthalmocentra, M. modesta var. ursinoides, M. pigra var. pigra, M. tenuiflora, Neptunia plena, Parapiptadenia zehntneri, Piptadenia stipulacea e Senegalia tenuifolia. Characteristics such as number of leaflets, shape and location of nectars, type of inflorescence, fruit and seed morphology were essential for the identification of taxa. Key identification, descriptions, comments of geographic distribution and taxonomic affinities of the species are presented.