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Type: Article
Published: 2017-11-07
Page range: 130–140
Abstract views: 22
PDF downloaded: 1

REVISITING THE TAXONOMIC DIVERSITY OF GUIBOURTIA IN THE NEOTROPICS (LEGUMINOSAE, DETARIOIDEAE)

Universidade Federal de Goiás, Instituto de Ciências Biológicas, Departamento de Botânica, Programa de Pós-Graduação em Biodiversidade Vegetal, Campus Samambaia, CEP 74690-900, Goiânia, GO, Brazil.
Instituto de Pesquisa Jardim Botânico do Rio de Janeiro, DIPEQ, Rua Pacheco Leão, 915, CEP 22460-030, Jardim Botânico, Rio de Janeiro, RJ, Brazil.
Universidade Federal de Mato Grosso do Sul, Instituto de Biociências, Caixa Postal 549, 79070-900, Campo Grande, MS, Brazil
Universidade Estadual de Campinas, Instituto de Biologia, Departamento de Biologia Vegetal, Rua Monteiro Lobato 255, CEP 13083-862, Cidade Universitária Zeferino Vaz, Campinas, SP, Brazil.
Cerrado Copaifera Cuba Fabaceae Hymenaea Peltogyne taxonomy Eudicots

Abstract

Guibourtia is a genus of Leguminosae comprising ca. 15 mostly African species, but it is also represented in the Neotropics, with populations in Cuba and South America. The Neotropical populations have been treated as comprising one to several species and/or infraspecific taxa. To access the distinctiveness of these putative taxa in the Neotropics, we analyzed morphological variation in herbarium specimens. Morphological discontinuities in leaflet shape, texture, and venation, and ovary pubescence support the recognition of two geographically disjunct species: G. hymenaeifolia in Cuba and G. chodatiana in South America. Another taxon, Guibourtia confertiflora is known from only a single specimen from northeastern Brazil. It possess characteristics of both Guibourtia and the related genus Peltogyne, and in most respects, it resembles the sympatric species Peltogyne pauciflora. We tentatively exclude it from our analysis pending further study. We provide an identification key, descriptions and illustrations of all treated taxa, taxonomic comments and formalization of synonyms and lectotypifications.