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Updates to the taxonomy of Swartzia (Leguminosae) in extra-Amazonian Brazil, with descriptions of five new species and a regional key to the genus

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Abstract

In advance of an updated monographic revision of Swartzia (Leguminosae), we discuss the taxonomy of the genus in extra-Amazonian Brazil and present descriptions of five new species. All of the new species are narrowly distributed in eastern Brazil in threatened Atlantic wet forest and coastal scrub habitats. Four of them—S. alagoensis, S. arenophila, S. revoluta, and S. submontana —belong to the diverse and taxonomically challenging section Acutifoliae, which has undergone extensive evolutionary radiation in the region. The fifth, S. thomasii, is a member of the otherwise Amazonian section Glabriplantae and is only subtly distinct from the Amazonian species S. reticulata. The new species and other recent additions to the genus are incorporated in a key to the species of Swartzia of extra-Amazonian Brazil.

Resumo

Como parte do estudo de atualização da monografia de Swartzia (Leguminosae), são apresentados dados sobre os táxons do Brasil extra-amazônico com a descrição de cinco espécies novas. Todas as novas espécies propostas neste trabalho apresentam distribuição restrita em habitats ameaçados na floresta atlântica brasileira e vegetação arbustiva costeira. Quatro novos táxons—S. alagoensis, S. arenophila, S. revoluta e S. submontana —pertencem à seção Acutifoliae, um grupo diverso e taxonomicamente complexo que teve alta radiação evolutiva na região. A quinta espécie, S. thomasii, pertence à seção Glabriplantae, um grupo mais comum na amazônia, e é apenas sutilmente distinta de S. reticulata, uma espécie amazônica. Devido ao fato da inclusão destes novos táxons e outras alterações recentes na taxonomia de Swartzia no Brasil extra-amazônico, é apresentada uma chave para distinguir as espécies de Swartzia desta área.

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Acknowledgements

We thank Gwilym Lewis, Michael Nee, and an anonymous reviewer for helpful comments on the manuscript, the curators of the herbaria cited for giving us access to their specimens and the following individuals and institutions for facilitating our fieldwork in eastern Brazil: J. G. Jardim, S. A. Sant’Ana (Centro de Pesquisas do Cacau), W. W. Thomas (The New York Botanical Garden), Rafaela Campostrini Forzza and Michel Barros (Jardim Botânico do Rio de Janeiro), Tiago da Cunha Arantes, and Maria Lenise Guedes (Universidade Federal da Bahia). BMT is especially grateful to the late André M. Carvalho, former curator of the CEPEC herbarium, for his hospitality and generous assistance during two trips to Bahia. Permission for field studies and collecting was granted by CNPq and SISBIO, a branch of the Environmental Ministry of Brazil. Funding was provided by the National Science Foundation (DEB-0309162 and DEB-0918498) and by CNPq, through a “Productivity in Research” grant to VFM (process number 312766/2009-2). The illustrations are from the skilled hand of Bobbi Angell.

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Authors and Affiliations

  1. Instituto de Biologia, Departamento de Botânica, Universidade Estadual de Campinas, CP 6109, CEP 13083-970, Campinas, SP, Brazil

    Rafael Barbosa Pinto

  2. Institute of Systematic Botany, The New York Botanical Garden, Bronx, NY, 10458-5126, U.S.A.

    Benjamin M. Torke

  3. Instituto de Pesquisas, Jardim Botânico do Rio de Janeiro, DIPEQ, Rua Pacheco Leão, 915, CEP 22460-030, Rio de Janeiro, RJ, Brazil

    Vidal de Freitas Mansano

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  1. Rafael Barbosa Pinto
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  2. Benjamin M. Torke
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  3. Vidal de Freitas Mansano
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Correspondence to Rafael Barbosa Pinto.

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Pinto, R.B., Torke, B.M. & Mansano, V.d.F. Updates to the taxonomy of Swartzia (Leguminosae) in extra-Amazonian Brazil, with descriptions of five new species and a regional key to the genus. Brittonia 64, 119–138 (2012). https://doi.org/10.1007/s12228-011-9219-8

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