Chamaecrista repens (Vogel 1837: 60) H.S. Irwin & Barneby (1982: 742)

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 : 27-28

11. Chamaecrista repens (Vogel 1837: 60) H.S. Irwin & Barneby (1982: 742) . ( Fig. 3h )

Subshrubs, branches pilose, inermous. Nectary petiolar, stipitate. Stipules lateral stipules, narrow–triangular. Leaves paripinnate, 20–22–foliolate, leaflets opposite, obovate, venation actinodromous, translucid punctuation absent. Inflorescence cymose, axillary. Flowers pedicellate, asymmetric, diplostemonous; calyx dialysepalous, sepals 5, corolla dialypetalous, violet, petals 5; androecium dialystaminous, homodinamous, anthers longitudinal; ovary superior, sessile, pluriovulate. Fruit legume, sessile, linear, plane, margin straight, epicarp glabrous, brown. Seeds trapezoid, plane, coat black, hilum basal.

Examined material:— BRAZIL. Paraíba: Maturéia, Pico do Jabre, 13 May 2019, fl., Aureliana Gomes 3011 ( HACAM); 14 October 2019, fl. & fr., Aureliana Gomes 87227 ( UFP).

Distribution and ecology:— The species occurs in all regions of Brazil, mainly in the Northeast region (AL, BA, CE, MA, PB, PE, PI, SE), associated with the Amazon, Caatinga, Cerrado and Atlantic Rainforest domains in mountain, coastal and depression ( Flora do Brasil 2020). It is also distributed in Paraguay, Uruguay, Argentina and Bolivia ( Camargo & Miotto 2004). In the study area, it was collected at the base of the outcrop, at 800 m.

Phenology— Registered with flowers in may and flowers and fruits in October.

Taxonomic discussion:— Chamaecrista repens can be recognized, mainly, by the subshrub habit, pilose branches, 20–22–leaflet leaves, asymmetrical pedicel flowers, with 5 violet petals.

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).