Fabaceae at National Forest (FLONA) of Assú, potiguar semiarid, Brazilian northeastern Louise

Fabaceae is the most diverse family in the flora of Brazil, including the Caatinga vegetation, the main natural region of the Brazilian Northeastern. This work consists in a taxonomic study of the family Fabaceae at the National Forest (FLONA) of Assú, Assú municipality, Rio Grande do Norte State, Brazil. Thirty seven species in twenty two genera and three subfamilies were recorded: Caesalpinioideae (07 spp.), Mimosoideae (11 spp.) and Papilionoideae (19 spp.), which Poincianella bracteosa, Mimosa camporum, Mimosa sensitiva, Galactia jussiaeana, Stylosanthes humilis and Vigna peduncularis representing new occurrences to the flora of the state. Keys for identification of its species, comments on the taxonomy, geographical distribution and flowering and fructification data, as well as illustrations for the species are presented.