Fabaceae Lindl. in a Conservation Unit in the Semi-Arid Region of Paraíba, Brazil Author Gomes, Aureliana Santos Departamento de Geografia - Universidade Federal de Campina Grande: - Campus I, Centro de Humanidades. Unidade Acadêmica de Geografia-UAG, R. Aprígio Veloso, 882, Universitário, Campina Grande, PB, 58428 - 830, Brasil. Author Rodrigues, Erimágna De Morais Author Moura, Débora Coelho Departamento de Geografia - Universidade Federal de Campina Grande: - Campus I, Centro de Humanidades. Unidade Acadêmica de Geografia-UAG, R. Aprígio Veloso, 882, Universitário, Campina Grande, PB, 58428 - 830, Brasil. Author Melo, José Iranildo Miranda De Programa de Pós-Graduação em Ecologia e Conservação - Universidade Estadual da Paraíba - UEPB, Departamento de Biologia, Centro de Ciências Biológicas e da Saúde, Av. das Baraúnas 351, Campus Universitário, Bairro Universitário, Campina Grande, PB, 58429 - 500, Brasil. Author Ribeiro, Rayane De Tasso Moreira Universidade Federal Rural de Pernambuco, Departamento de Biologia, Laboratório de Taxonomia Vegetal (LATAX), Rua Dom Manoel de Medeiros, s / n, Campus Dois Irmãos, 52.171 - 900, Recife, PE, Brasil. Author Queiroz, Rubens Teixeira De Departamento de Sistemática e Ecologia- Universidade Federal da Paraíba - Campus I, Centro de Ciências Exatas e da Natureza, Jardim Universitário, Castelo Branco, João Pessoa, PB, 58051 - 900, Brasil. & Author for correspondence: rbotânico @ gmail. com text Phytotaxa 2022 2022-07-19 555 1 17 41 http://dx.doi.org/10.11646/phytotaxa.555.1.2 journal article 102841 10.11646/phytotaxa.555.1.2 2e2412c5-4709-4f24-b489-db901a316721 1179-3163 6875635 9. Centrosema sagittatum (Humboldt & Bonpland ex Willdenow 1809: 757) Brandegee (1905: 202) . ( Fig. 3d ) Vines , branches glabrous, inermous. Nectary absent. Stipules lateral, triangular. Leaves imparipinnate, 1–3– foliolate, opposite, sagittate, venation brochidodromous, translucid punctuation absent absent. Inflorescence raceme, axillary. Flowers pedicellate, zygomorphic, diplostemonous; calyx gamosepalous, sepals 5, corolla dialypetalous, papilionaceous, whitish, petals 5; androecium diadelphous, heterodinamous, anthers longitudinal; ovary superior, sessile, pluriovulate. Fruit legume, sessile, linear, plane, margin straight, epicarp glabrous, whitish. Seeds reniform, plane, coat marbled, hilum central. Examined material:— BRAZIL . Paraíba : Maturéia , Pico do Jabre , 900 m elev., 13 May 2019 , fl., Aureliana Gomes 2096 ( HACAM ) . Distribution and ecology:— The species has distribution in South America, among secondary vegetation ( Lima & Mansano2011 ).In Brazil , it is present in the Central-West,Northeast, Southeast and South regions in the phytogeographic domains of Caatinga, Cerrado, Atlantic Rainforest and Pantanal, in rocky fields, seasonal semideciduous forest, rain forest and in sandbank areas (INCT - Virtual Herbarium of Flora and Fungi). This species occurs preferably in the undergrowth of the forest ( Queiroz 2021 ). Phenology:— Found with flowers in May. Centrosema sagittatum can be easily recognized, mainly, by the vine habit, 1–3 foliolate imparipinnate leaves, opposite, sagittate leaflets, dialypetalous corolla, papilionaceous, whitish and reniform seeds.