Abstract
Eugenia aeterna, a new species of Eugenia sect. Eugenia is described and illustrated. It has been recorded in the Ombrophilous Forest of the Atlantic Forest Domain in the municipalities of Caraguatatuba and Ubatuba, São Paulo state, Brazil. The new species is apparently related to Eugenia ligustrina and E. longipedunculata being distinct from both by: cataphylls persistent until mature twigs, even in the vegetative phase of the plant (versus cataphylls deciduous); puberulent or pilose hypanthium (vs. glabrous hypanthium) and calyx lobes reflexed and appressed to the fruit (vs. calyx lobes erect in the fruit). Following IUCN red list criteria, Eugenia aeterna is classified Least Concern. Additionally, a distribution map is provided.
References
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<p>Willdenow, C.L. (1799) <em>Species Plantarum</em>. Editio Quarta. Berolini [Berlin] ed. 4, 2. 962 pp.</p>
<p>Barroso, G.M. (1991) <em>Sistemática de Angiospermas do Brasil</em>, vol. 2. Viçosa: Universitária.</p>
<p>Hickey, L.J. (1973) Classification of the architecture of dicotyledoneous leaves. <em>American Journal of Botany</em> 1: 17–33. https://doi.org/10.1002/j.1537-2197.1973.tb10192.x</p>
<p>Giaretta, A., Lucas, E. & Sano, P.T. (2021) Taxonomic monograph of <em>Eugenia</em> sect. <em>Schizocalomyrtus</em> (Myrtaceae: Myrteae), a group within <em>Eugenia</em> with unusual flowers. <em>Phytotaxa</em> 524 (3): 135–177. https://doi.org/10.11646/phytotaxa.524.3.1</p>
<p>IUCN (2012) <em>IUCN Red List Categories and Criteria: Version 3.1</em>, ed. 2. Gland, Switzerland and Cambridge, IUCN, UK, iv + 32 pp.</p>
<p>Lamarck, J.B.A.P. de M. (1789) <em>Encyclopédie méthodique Botanique</em> 3 (1). Plomteux, Liège, Panckoucke, Paris, pp. 196–207.</p>
<p>Legrand, C.D. (1961) Mirtaceas del estado de Santa Catarina (Brasil). <em>Sellowia</em> 13: 310–311.</p>
<p>Linnaeus, C. (1753) <em>Species Plantarum</em>. Stockholm, v. 1, 560 pp.</p>
<p>Mazine, F.F., Bünger, M., Faria, J.E.Q., Fernandes, T., Giaretta, A., Valdemarin, K.S., Santana, K.C., Souza, M.A.D. & Sobral, M. (2022) <em>Eugenia</em> <em>in Flora e Funga do Brasil</em>. Jardim Botânico do Rio de Janeiro. Available from: https://floradobrasil.jbrj.gov.br/FB10503 (accessed 12 December 2022)</p>
<p>Mazine, F.F., Faria, J.E.Q., Giaretta, A., Vasconcelos, T., Forest, F. & Lucas, E. (2018a) Phylogeny and biogeography of the hyper-diverse genus <em>Eugenia</em> (Myrtaceae: Myrteae), with emphasis on <em>E</em>. sect. <em>Umbellatae</em>, the most unmanageable clade. <em>Taxon</em> 67: 752–769.</p>
<p>Mazine, F.F., Sobral, M. & Valdemarin, K.S. (2018b) A new species of <em>Eugenia</em> (Myrtaceae) from Rio de Janeiro State, Brazil. <em>Phytotaxa</em> 343 (2): 160–166. https://doi.org/10.11646/phytotaxa.343.2.6</p>
<p>Mazine, F.F., Bünger, M.O., Faria, J.E.Q, Lucas, E. & Souza, V.C. (2016) Sections in <em>Eugenia</em> (Myrteae, Myrtaceae): nomenclatural notes and a key. <em>Phytotaxa</em> 289 (3): 225–236. https://doi.org/10.11646/phytotaxa.289.3.2</p>
<p>Miquel, F.A.W. (1849) Plantae Regnellianae: Myrtaceae. <em>Linnaea</em> 22 (5): 532–537.</p>
<p>Niedenzu, F. (1893) Myrtaceae. <em>In</em>: Prantl, K. & Engler, A. (Eds.) <em>Die Natürlichen Pflanzenfamilien</em>. Vol 3. Engelmann Press, Leipzig, pp. 57–105. https://doi.org/10.5962/bhl.title.4635</p>
<p>Payne, W.W. (1978) A glossary of plant hair terminology. <em>Brittonia</em> 30: 239–255. https://doi.org/10.2307/2806659</p>
<p>QGIS (2021) QGIS Development Team. QGIS Geographic Information System. Open Source Geospatial Foundation Project. Available from: http://qgis.osgeo.org (accessed 30 July 2021)</p>
<p>Ribeiro, J.E.L.S., Hopkins, M.J.G., Vicentini, A., Sothers, C.A., Costa, M.A.S., Brito, J.M., Souza, M.A.D., Martins, L.H., Lohmann, L.G., Assunção, P.A., Pereira, E., Silva, C.F., Mesquita, M.R. & Procópio, L.C. (1999) <em>Flora da Reserva Ducke: Guia de identificação das plantas vasculares de uma floresta de terra firme na Amazônia Central</em>. INPA-DFID, Manaus, 800 pp.</p>
<p>Santana, K.C., Oliveira, M.I.U., Mazine, F.F. & Funch, L.S. (2017) Flora da Bahia: <em>Eugenia </em>sect. <em>Eugenia</em> (Myrtaceae). <em>Sitientibus Série Ciências Biológicas</em> 17. https://doi.org/10.13102/scb2624</p>
<p>Swartz, O. (1788) <em>Nova Genera et Species Plantarum</em>. Stockholm, 158 pp.</p>
<p>Thiers, B. (2023) [continuously updated] Index Herbariorum: A global directory of public herbaria and associated staff. New York Botanical Garden’s Virtual Herbarium. Available from: http://sweetgum.nybg.org/science/ih/ (accessed 27 May 2022)</p>
<p>Valdemarin, K.S., Faria, J.E.Q., Mazine, F.F. & Souza, V.C. (2020) A New Species of <em>Eugenia</em> subg. <em>Pseudeugenia</em> (Myrtaceae, Myrteae) from Brazilian Atlantic Forest. <em>Systematic Botany</em> 45: 537–543. https://doi.org/10.1600/036364420X15935294613518</p>
<p>Valdemarin, K.S., Camargo, P.H.S.A., Moreno, D.J., Souza, V.C., Lucas, E. & Mazine, F.F. (2022) <em>Eugenia paranapanemensis</em> (Myrtaceae), The Pitanga-amarela, and a Key to <em>Eugenia</em> sect. <em>Eugenia</em> Species from São Paulo State, Brazil. <em>Systematic Botany</em> 47 (2): 498–505. https://doi.org/10.1600/036364422X16512564801669</p>
<p>Willdenow, C.L. (1799) <em>Species Plantarum</em>. Editio Quarta. Berolini [Berlin] ed. 4, 2. 962 pp.</p>