RESUMO Este trabalho apresenta um estudo taxonômico das espécies de Leguminosae - Dalbergieae para a Mata do Buraquinho, João Pessoa, Paraíba, uma área mista contendo elementos de Mata Atlântica, da flora amazônica e da Hileia Baiana. O trabalho tem por base coletas de campo e a análise morfológica de materiais depositados em herbários. Foram encontradas 11 espécies nativas distribuídas em sete gêneros: Aeschynomene evenia, A. viscidula, Andira legalis, A. nitida, Arachis pintoi, Machaerium hirtum, Pterocarpus rohrii, Stylosanthes capitata, S. guianensis, S. viscosa e Zornia latifolia. Desse total de espécies, seis com hábito subarbustivo, quatro com hábito arbóreo e uma herbácea. A ocorrência de Aeschynomene evenia, Andira legalis, Arachis pintoi e Stylosanthes gracilis é registrada pela primeira vez para o Estado da Paraíba. São apresentados chave de identificação, descrições, comentários sobre a morfologia e ilustrações para as espécies.

ABSTRACT This work presents a taxonomic study of species of Leguminosae - Dalbergieae from Mata do Buraquinho, João Pessoa, Paraíba State, which is a mixed area composed by elements of Rain Forest, the Amazonian flora, and the Bahian Hileia. The study was based on field collections and morphological analysis of herbarium specimens. As a result, 11 native species distributed into seven genera were found: Aeschynomene evenia, A. viscidula, Andira legalis, A. nitida, Arachis pintoi, Machaerium hirtum, Pterocarpus rohrii, Stylosanthes capitata, S. guianensis, S. viscosa, and Zornia latifolia. Of these species, six are bushes, four are trees, and one is an herb. The occurrence of Aeschynomene evenia, Andira legalis, Arachis pintoi, and Stylosanthes gracilis is recorded for the first time in the state of Paraíba. Identification key, descriptions, comments on the morphology and illustrations for the species are presented.

ABSTRACT In heterantherous flowers, some anthers have an attraction and feeding function, while others are related to plant reproduction. Microlicia cordata has dimorphic stamens organized in two cycles: the antesepalous one with large stamens and pink anthers, and the antepetalous one with small stamens and yellow anthers. Division of labor was analyzed using the parameters of structure, composition, amount and estimated viability of pollen, and the color of floral parts. The anthers of the pollinating stamens were larger than the anthers of the feeding stamens, although anatomically similar. There was a difference in the amount of pollen produced by the anthers of the two cycles, but no difference was found in pollen viability. Considering a bee color vision model, the color of the anthers of the pollinating stamens contrasted less with that of the corolla, and thus is probably less attractive to visitors. Conversely, the anthers of the feeding stamens and the ventral appendage of the connective of the pollinating stamens contrasted more with the corolla, presenting the same color to the pollinators. These results are in accordance with the idea of division of labor among anthers of heterantherous flowers, especially regarding the quantity of pollen and the color of the floral parts.