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 36. Stylosanthes viscosa (Linnaeus 1759: 20–21) Swartz (1788: 108) . ( Fig. 3k ) Subshrubs , branches glandular, inermous. Nectary absent. Stipules lateral, triangular. Leaves imparipinnate, 3– foliolate, leaflets opposite, elliptic, venation camptodromous, translucid punctuation absent. Inflorescence spike, axillary, terminal. Flowers sessile, zygomorphic, diplostemonous; calyx gamosepalous, sepals 5, corolla dialypetalous, papilionaceous, yellow, petals 5; androecium monadelphous, heterodinamous, anthers longitudinal; ovary superior, sessile, pauciovulate. Fruit loment, sessile, ovate, plane, margin straight, epicarp glabrous, brown. Seeds reniform, plane, coat brown, hilum sub-basal. Examined material:— BRAZIL . Paraíba : Maturéia , Pico do Jabre , 800 m elev., 05 October 2018 , fl., Aureliana Gomes 3017 ( HACAM ) . Distribution and ecology:— It has a wide distribution in the American continent (Ramalho; Rosa, 2010). In Brazil , this species presents itself in a greater proportion in the Northeast region, followed by the North, CentralWest, Southeast and South regions of the country, associated with the domains of the Amazon, Caatinga, Cerrado and Atlantic Forest (BFG 2018, Mendonça et al. 2019 ). Phenology:— Registered with flowers in October. Taxonomic discussion:— Stylosanthes viscosa can be recognized, mainly, by the subshrubby habit, by the lateral stipules and 3–foliolate leaves, inflorescence in spike, yellow corolla flowers and loment fruits. Regarding the species of Papilionoideae, it shares, among other species of the group, the presence of glutinous branches, stipule adnate to the petiole and 3–foliolate leaves. However, it is distinguished from other species with 3–foliolate leaves due to the presence of a stipule adnate to the petiole.