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| Siphoneugena carolynae T.Fern. & J.M.A.Braga, in Fernandes, Faria, Caldas, Costa Souza et Braga, 2024. |
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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| Siphoneugena carolynae. A. Fertile branch. B. Leaf adaxial surface (detail: flat midvein). C. Leaf abaxial surface. D. Axillary inflorescences. E. Detail of flower buds. F. Leafless branch with fruits at early stages of maturation. A-E from Fernandes 1018; F from Fernandes 1258. Photographs by Thiago Fernandes. |
Siphoneugena carolynae T.Fern. & J.M.A.Braga, sp. nov.
Thiago Fernandes, Jair Eustáquio de Faria, Diana Kelly Dias Caldas, Marcelo da Costa Souza & João Marcelo Alvarenga Braga. 2024. Siphoneugena carolynae (Myrtaceae), A New Species from the Brazilian Atlantic Forest. Brittonia. 76; 137–143. DOI: doi.org/10.1007/s12228-024-09784-0
