Lachesiodendron viridiflorum ( Kunth 1821: 81–83 ) P.G. Ribeiro, L.P. Queiroz & Luckow (2018: 45–51)

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 : 29-30

17. Lachesiodendron viridiflorum ( Kunth 1821: 81–83) P.G. Ribeiro, L.P. Queiroz & Luckow (2018: 45–51)

Trees, branches glabrous, spines. Nectary petiolar, sessile. Stipules caducous. Leaves bipinnate, 14–16–foliolate, leaflets opposite, oblong, venation actinodromous, translucid punctuation absent. Inflorescence spikes, axillary. Flowers sessile, actinomorphic, diplostemonous; calyx gamosepalous, sepals 5, corolla gamopetalous, tubular, green, petals 5; androecium dialystaminous, homodinamous, anthers longitudinal; ovary superior, sessile, pluriovulate. Fruit legume, sessile, linear, plane-corrugate, margin straight, epicarp glabrous, brown. Seeds obovate, plane, coat brown, hilum basal.

Examined material:— BRAZIL. Paraíba: Maturéia, Pico do Jabre , 950 m elev,. 04 November 2019, fl., Aureliana Gomes 472 ( JPB) .

Distribution and ecology:— The species occurs in Argentina, Bolivia, Colombia, Ecuador, Guatemala, Mexico, Peru and Venezuela and in Brazil, where it is registered in the Central-West (MS), Northeast (AL, BA, CE, PB, PE, PI, RN, SE) and Southeast (MG), associated with the Caatinga and Cerrado domains in areas of seasonal deciduous forest (Freire Júnior & Silva 2019; Flora do Brasil 2020).

Phenology:— Registered with flowers in November.

Taxonomic discussion:— Lachesiodendron viridiflorum can be recognized, mainly, by the armed branches with thorns, inflorescence in spikes, green flowers and sessile legume. Among the species of the Mimosoideae clade found in the area, this species was the only with thorns, while all other species of the clade are armed and aculeate.