19. Macroptilium martii (Bentham 1837: 77–78) Maréchal & Baudet (1977: 257)

Climbing, branches tomentose, inermous. Nectary absent. Stipules lateral, triangular. Leaves imparipinnate, 3– foliolate, leaflets opposite, ovate, venation actinodromous, translucid punctuation absent. Inflorescence raceme, axillary. Flowers pedicellate, asymmetric, diplostemonous; calyx gamosepalous, sepals 5, corolla dialypetalous, papilionaceous, red, petals 5; androecium diadelphous, heterodinamous, anthers longitudinal; ovary superior, sessile, pluriovulate. Fruit legume, sessile, linear, cylindric, margin straight, epicarp tomentulose, brown. Seeds reniform, turgid, coat marbled, hilum central.

Examined material:— BRAZIL. Paraíba: Maturéia, Pico do Jabre, 800 m elev., 13 May 2019, fl., Aureliana Gomes 3010 (HACAM) .

Distribution and ecology:— In Brazil, it is distributed throughout the Northeastern semi-arid region, and can also be found in Paraguay (Araújo et al. 2014; INCT:—Virtual Herbarium of Flora and Fungi).

Phenology:— Registered with flowers in May.

Macroptilium martii can be recognized, mainly, by the vine habit, leaves with ovate leaflets, asymmetric flowers, red, and by the cylindrical fruits. The species is popularly known as orelha de onça, because your leaflets are rounded the same a small ear (Queiroz, 2021).