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Issue: Vol. 718 No. 1: 16 Sept. 2025
Type: Article
Published: 2025-09-16
DOI: 10.11646/phytotaxa.718.1.2
Page range: 15-26
Abstract views: 614
PDF downloaded: 14

A new species from Mimosa subseries Polycarpae (Leguminosae, Caesalpinioideae) in the Brazilian Pantanal

Programa de Pós-graduação em Biologia Vegetal, Instituto de Biociências, Universidade Federal de Mato Grosso do Sul, Avenida Senador Felinto Muller, s.n., Cidade Universitária, Campo Grande, Mato Grosso do Sul, 79070-900, Brazil; Programa de Pós-graduação em Biologia Comparada, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, Avenida Bandeirantes, 3900, Ribeirão Preto, São Paulo, 14040-901, Brazil; Laboratório de Taxonomia e Evolução de Plantas, Universidade Federal de São Carlos, Departamento de Botânica, Rodovia Washington Luis, km 235, São Carlos, São Paulo, 13565-905, Brazil
Instituto de Recursos Biológicos (IRB), Instituto Nacional de Tecnología Agropecuaria (INTA), Los Reseros y N. Repetto, s/n, Hurlingham, Buenos Aires, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Godoy Cruz 2290, CABA, Argentina
Laboratório de Sistemática Vegetal, Instituto de Biociências, Universidade Federal de Mato Grosso do Sul, Avenida Senador Felinto Muller, s.n., Cidade Universitária, Campo Grande, Mato Grosso do Sul, 79070-90, Brazil
eudicots Fabaceae polyploid taxonomy wetlands

Abstract

Mimosa humidicola (Leguminosae, Caesalpinioideae) is described and illustrated for the first time. It occurs exclusively in Pantanal, in wetlands and temporary flooded ponds in southern Mato Grosso and the northwest of Mato Grosso do Sul, both in the Brazilian Midwest. Morphological description and taxonomic, ecology and geographical comments are provided. It species can be distinguished by the pubescence of leaflets, the corolla-lobes carmine contrasting with its whitish filaments and the widely-oblong pods dense pubescent. We also present a synopsis for Mimosa subser. Polycarpae with an analysis of the geographical distribution, habit, and an identification key for its species in South America. Additionally, we cited a new occurrence of Mimosa balansae in the Brazilian Chaco.

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How to Cite

Nogueira, L.H., Morales, M. & Sartori, Ângela L. (2025) A new species from Mimosa subseries Polycarpae (Leguminosae, Caesalpinioideae) in the Brazilian Pantanal. Phytotaxa 718 (1): 15–26. https://doi.org/10.11646/phytotaxa.718.1.2