Mimosa invisa Martius ex Colla (1834: 255)

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 : 31

21. Mimosa invisa Martius ex Colla (1834: 255) . ( Fig. 4f )

Vines, branches glabrous, aculeate. Nectary absent. Stipules lateral, narrow–triangular. Leaves bipinnate, paripinnate, 8–foliolate, leaflets opposite, oblong, venation actinodromous, translucid punctuation absent. Inflorescence spike, axillary. Flowers sessile, actinomorphic, isostemonous; calyx gamosepalous, sepals 4, corolla gamopetalous, tubular, rose, petals 4; androecium dialystaminous, homodinamous, anthers longitudinal; ovary superior, sessile, pluriovulate. Fruit craspedium, sessile, linear, plane, margin straight, epicarp pilose, brown. Seeds obovate, plane, coat brown, hilum basal.

Examined material:— BRAZIL. Paraíba: Maturéia, Pico do Jabre , 875 m elev., 13 October 2019, fl. & fr., Aureliana Gomes 2022 ( HACAM) .

Distribution and ecology:— The species has a wide distribution in South America. In Brazil, it occurs in all regions, being widely distributed in the Northeast (BA, CE, PE, PI, RN) associated with the Amazon, Caatinga, Cerrado and Atlantic Rainforest domains, found in rocky outcrops vegetation, and seasonal forests, as well as anthropized areas ( Flora do Brasil 2020).

Phenology:— Registered with flowers and fruits in October.

Taxonomic discussion:— Mimosa invisa can be recognized, mainly, by the shrub habit, glabrous branches, with rickly., inflorescence pink spikes and long craspedium with straight margin. This was the only representative of Mimosa with a vine habit, a characteristic that differs from the other similar species found in the study area, which show arboreous habit.

Figures

FIGURE 4. Species of Fabaceae Lindl. of the study area, Pico do Jabre State Park, Paraíba, Brazil. a Chamaecrista nictitans. b Anadenanthera colubrina. c Chamaecrista zygophylloides. d Albizia polycephala. e Senna macranthera. f Mimosa invisa. g Senna rizzinii. h Calliandra subspicata. i Enterolobium contortisiliquum. j Senna martiana. (Source: the authors).