Centrosema sagittatum (Humboldt & Bonpland ex Willdenow 1809: 757) Brandegee (1905: 202)

Gomes, Aureliana Santos, Rodrigues, Erimágna De Morais, Moura, Débora Coelho, Melo, José Iranildo Miranda De, Ribeiro, Rayane De Tasso Moreira & Queiroz, Rubens Teixeira De, 2022, Fabaceae Lindl. in a Conservation Unit in the Semi-Arid Region of Paraíba, Brazil, Phytotaxa 555 (1), pp. 17-41 : 27

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.

Figures

FIGURE 3. Species of Fabaceae Lindl. of the study area, Pico do Jabre State Park, Paraíba, Brazil. a Centrosema brasilianum. b Platymiscium floribundum. c Macropsychanthus grandiflorus d Centrosema sagittatum. e Ancistrotropis peduncularis. f Poecilanthe grandiflora. g Erythrina velutina. h Chamaecrista repens. i Canavalia brasiliensis. j Bauhinia cheilantha. k Stylosanthes viscosa. l Crotalaria vitelina. (Source: the authors).