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Siphoneugena carolynae (Myrtaceae), a new species from the Brazilian Atlantic Forest

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Abstract

This study describes Siphoneugena carolynae (Myrtaceae), a new species from the Brazilian Atlantic Forest, in the state of Rio de Janeiro. The species inhabits inselberg forests and differs from all other species of Siphoneugena by the following exclusive combination of morphological characters: relatively long petioles, leaf blades chartaceous with midvein canaliculate adaxially, inflorescences in racemes with a markedly compressed and indistinguishable main axis, hypanthium markedly constricted above the ovary, calyx calyptrate, ovaries with two locules, each with four ovules, and cotyledons densely covered with foveolate glands. We herein provide taxonomic notes, morphological plates (derived from both fresh and dried material), and a distribution map. Regarding the conservation status, the new species is preliminarily assessed as Data Deficient (DD), but comments on population size and possible threats to the habitat are presented.

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Acknowledgements

TF thanks CNPq (Conselho Nacional de Desenvolvimento Científico e Tecnológico) for the scholarship (Process n°. 141327/2020-0) and Universidade Federal Fluminense (UFF) and its herbarium (NIT) for laboratory support. We are also grateful to Pablo Viany Prieto and Pablo Fernando Feliz Moreira for company and help during the field works.

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Authors and Affiliations

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

    Thiago Fernandes, Diana Kelly Dias Caldas & João Marcelo Alvarenga Braga

  2. Departamento de Botânica, Universidade de Brasília, Brasília, DF, CEP 70910-900, Brazil

    Jair Eustáquio de Faria

  3. Universidade Federal Rural do Rio de Janeiro, BR-465, Km 7, Seropédica, RJ, 23890-000, Brazil

    Marcelo da Costa Souza

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  1. Thiago Fernandes
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Correspondence to Thiago Fernandes.

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Fernandes, T., de Faria, J.E., Caldas, D.K.D. et al. Siphoneugena carolynae (Myrtaceae), a new species from the Brazilian Atlantic Forest. Brittonia (2024). https://doi.org/10.1007/s12228-024-09784-0

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