Abstract
Here we describe Eugenia nordestina (Myrtaceae), a new species endemic from northeastern Brazil; it was registered predominantly in stepic-savanna vegetation (“Caatinga”) from the states of Ceará and Piauí, frequently associated with the sedimentary basin of Ibiapaba Complex. The new species is morphologically close to E. dysenterica, differing by the bark longitudinally cleft with a stiff-exfoliating periderm (vs. bark cleft in both orientations, with a very thick and non-exfoliating periderm), bracteoles 4,5–6 mm long (vs. 0.9–3.2 mm), calyx lobes 5–6.5 mm long (vs. 3.1–4.3 mm long), petals without glandular dots (vs. with sparse glandular dots) and fruits 1.3–2.3 × 1–2 cm (vs. 1.8–3 × 2.5–3.5 cm). A distribution map and field photographs are also provided.
References
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<p>Moro, M.F., Macedo, M.B., Moura-Fé, M.M., Castro, A.S.F. & Costa, R.C. (2015) Vegetação, unidades fitoecológicas e diversidade paisagística do estado do Ceará. <em>Rodriguésia</em>. 66: 717–743. https://doi.org/10.1590/2175-7860201566305</p>
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<p>Santana, K.C., Oliveira, M., Mazine, F. & Funch, L. (2017) Flora da Bahia: <em>Eugenia</em> sect. <em>Eugenia</em> (Myrtaceae). <em>Sitientibus Série Ciências Biológicas </em>17: 1–14. https://doi.org/10.13102/scb2624</p>
<p>Sobral, M. (2010) Ten new Myrtaceae from eastern and northeastern Brazil. <em>Journal of the Botanical Research Institute of Texas</em> 4: 133–158.</p>
<p>Thiers, B. (2022) <em>Index Herbariorum: a global directory of public herbaria and associated staff.</em> New York Botanical Garden’s Virtual Herbarium. Available from http://sweetgum.nybg.org/science/ih/ (accessed 10 January 2022).</p>
<p>WCSP (2021) <em>World checklist of selected plant families</em>. Royal Botanic Gardens, Kew. Available from http://wcsp.science.kew.org/ (accessed 21 July 2021).</p>
<p>Briggs, B.G. & Johnson, L.A.S. (1979) Evolution in the Myrtaceae—evidence from inflorescence structure. <em>Proceedings of the Linnean Society of New South Wales</em> 102: 157–256.</p>
<p>Candolle, A.P. de (1828) <em>Prodromus Systematis Naturalis Regni Vegetabilis. Vol. 3</em>. Trettel & Würtz, Paris, 268 pp.</p>
<p>Costa-Lima, J.L. & Chagas, E.C.O. (2018) Six new species of <em>Eugenia</em> (Myrtaceae) from the Atlantic Forest of northeastern Brazil. <em>Phytotaxa</em> 373: 211–220. https://doi.org/10.11646/phytotaxa.373.3.4</p>
<p>Coutinho, K., Oliveira, M.I.U. & Funch, L.S. (2015) Four new species of <em>Eugenia</em> (Myrtaceae) from the Caatinga and Atlantic Forest of northeastern Brazil. <em>Phytotaxa</em> 23: 215–226. https://doi.org/10.11646/phytotaxa.234.3.2</p>
<p>Faria, J.E.Q. de. (2010) <em>O gênero Eugenia L. (Myrtaceae) nos estados de Goiás e Tocantins, Brasil</em>. Curso de Programa de Pós-Graduação em Botânica, Instituto de Ciências Biológicas - Departamento de Botânica, Universidade de Brasília, Brasília. 250 pp. Available from https://repositorio.unb.br/handle/10482/6568 (accessed 30 July 2021)</p>
<p>Faria, J.E.Q. de. (2014) <em>Revisão taxonômica e filogenia de Eugenia sect. Pilothecium (Kiaersk.) D. Legrand (Myrtaceae)</em>. Tese (Doutorado em Botânica), Universidade de Brasília, Brasília, 215 pp. Available from https://repositorio.unb.br/handle/10482/18256 (accessed 30 July 2021).</p>
<p>Govaerts, R., Sobral, M., Ashton, P., Barrie, F., Holst, B.K., Landrum, L.R., Matsumoto, K., Mazine, F.F., Nic Lughadha, E., Proença, C., Soares-Silva, L.H., Wilson, P.G. & Lucas, E. (2008) <em>World checklist of Myrtaceae</em>. Richmond: Kew Publishing, Royal Botanic Garden, 470 pp.</p>
<p>Hickey, M. & King, C. (2000) <em>The Cambridge illustrated glossary of botanical terms.</em> Cambridge University Press, Cambridge, 208 pp.</p>
<p>INCT (Instituto Nacional de Ciência e Tecnologia) (2021)<em> speciesLink</em>. Available from: https://specieslink.net/ (accessed 8 September 2021).</p>
<p>IUCN [International Union for the Conservation of Nature] (2012) <em>IUCN Red List Categories and Criteria</em>. Version 3.1<em>, </em>second edition. Gland, Switzerland and Cambridge, 32 pp. Available from: https://www.iucnredlist.org/resources/categories-and-criteria (accessed 31 July 2021).</p>
<p>IUCN [International Union for the Conservation of Nature] (2019) <em>Guidelines for Using the IUCN Red List Categories and Criteria</em>. Version 14. Standards and Petitions committee. Available from: http://www.iucnredlist.org/documents/RedListGuidelines.pdf (accessed 31 July 2021).</p>
<p>Landrum, L. & Kawasaki, M.L. (1997) The genera of Myrtaceae in Brazil: an illustrated synoptic treatment and identification keys. <em>Brittonia</em> 49: 508–536. https://doi.org/10.2307/2807742</p>
<p>Linnaeus, C. (1753) <em>Species Plantarum. Vol. 1</em>. Imprensis Laurentii Salvii, Holmiae, 470 pp.</p>
<p>Lourenço, A.R.L., Amorim, B.S. & Alves, M. (2013) <em>Eugenia pipensis</em>, a new species of <em>Eugenia</em> sect. <em>Umbellatae</em> (Myrtaceae) from northeastern Brazil. <em>Phytotaxa </em>104: 30–34. https://doi.org/10.11646/phytotaxa.104.1.4</p>
<p>Lourenço, A.R.L., Costa-Lima, J.L. & Chagas, E.C.O. (2019) <em>Eugenia caipora</em>, a new species of <em>Eugenia</em> sect. <em>Pseudeugenia</em> (Myrtaceae) from northeastern Brazil. <em>Phytotaxa</em> 408: 129–135. https://doi.org/10.11646/phytotaxa.408.2.6</p>
<p>Martius, C.F.P. von & Spix, J.B. von (1828) <em>Reise in Brasilien: auf Befehl Sr. Majestät Maximilian Joseph I., Königs von Baiern, in den Jahren 1817 bis 1820 gemacht und beschrieben. </em>Zweiter Teil, München, pp. 415–885.</p>
<p>Mazine, 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: 225–236. https://dx.doi.org/10.11646/phytotaxa.289.3.2</p>
<p>Mazine, F.F., Valdemarin, K.S., Bünger, M., Faria, J.E.Q., Fernandes, T., Giaretta, A., Santana, K.C., Sobral, M., Souza, M.A.D. (2021) <em>Eugenia</em> <em>in</em> Flora do Brasil 2020. Jardim Botânico do Rio de Janeiro. Available from: http://floradobrasil.jbrj.gov.br/reflora/floradobrasil/FB10388 (accessed 31 July 2021)</p>
<p>Moro, M.F., Lughadha, E.N, Filer, D.L., Araújo, F.S. & Martins, F.R. (2014) A catalogue of the vascular plants of the Caatinga Phytogeographical Domain: a synthesis of floristic and phytosociological surveys. <em>Phytotaxa</em> 160: 1–118. http://dx.doi.org/10.11646/phytotaxa.160.1.1</p>
<p>Moro, M.F., Macedo, M.B., Moura-Fé, M.M., Castro, A.S.F. & Costa, R.C. (2015) Vegetação, unidades fitoecológicas e diversidade paisagística do estado do Ceará. <em>Rodriguésia</em>. 66: 717–743. https://doi.org/10.1590/2175-7860201566305</p>
<p>QGIS (2021) <em>QGIS Geographic Information System</em>, v. 3.16. QGIS Development Team. Open Source Geospatial Foundation Project. Available from http://qgis.osgeo.org (accessed 30 July 2021).</p>
<p>Radford, A.E., Dickison, W.C., Massey, J.R. & Bell, C.R. (1974) <em>Vascular Plant Systematics</em>. Harper Collins, New York, 891 pp.</p>
<p>Santana, K.C., Oliveira, M., Mazine, F. & Funch, L. (2017) Flora da Bahia: <em>Eugenia</em> sect. <em>Eugenia</em> (Myrtaceae). <em>Sitientibus Série Ciências Biológicas </em>17: 1–14. https://doi.org/10.13102/scb2624</p>
<p>Sobral, M. (2010) Ten new Myrtaceae from eastern and northeastern Brazil. <em>Journal of the Botanical Research Institute of Texas</em> 4: 133–158.</p>
<p>Thiers, B. (2022) <em>Index Herbariorum: a global directory of public herbaria and associated staff.</em> New York Botanical Garden’s Virtual Herbarium. Available from http://sweetgum.nybg.org/science/ih/ (accessed 10 January 2022).</p>
<p>WCSP (2021) <em>World checklist of selected plant families</em>. Royal Botanic Gardens, Kew. Available from http://wcsp.science.kew.org/ (accessed 21 July 2021).</p>