Abstract
Euploca decorticans, is here described and illustrated as a new species from a heretofore poorly collected mountain area in Goiás state, Brazil. It is most morphologically similar to E. salicoides, one of the most widely distributed taxa of the genus in Brazil but differs from that species in several features related to habit (height and growth aspect), leaves (shape, trichome types, and venation pattern), flowers (size, corolla shape, length, color), inflorescence (length), fruits (diameter and trichome types) and nutlets (shapes), among other features. We include a distribution map besides photos and drawings of the new species, and we also discuss its conservation status.
References
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<p>Melo, J.I.M. & Semir, J. (2009) Two new Brazilian species and new combinations in <em>Euploca</em> (Heliotropiaceae) from Brazil. <em>Kew Bulletin</em> 64: 285–289. https://doi.org/10.1007/s12225-009-9109-3</p>
<p>Melo, J.I.M. & Semir, J. (2010) Taxonomia do gênero <em>Euploca</em> Nutt. (Heliotropiaceae) no Brasil. <em>Acta Botanica Brasilica</em> 24: 111–132. https://doi.org/10.1590/S0102-33062010000100012</p>
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<p>Melo, J.I.M. (2015) Synopsis of Boraginaceae <em>sensu lato </em>in the Caatingas of the São Francisco River, Northeastern Brazil. <em>Anales del Jardín Botánico de Madrid</em> 72 (1): e013. https://doi.org/10.3989/ajbm.2398</p>
<p>Melo, J.I.M., Paulino, R.C, Oliveira, R.C. & Vieira, D.D. (2018) Flora of Rio Grande do Norte, Brazil: Boraginales.<em> Phytotaxa</em> 357: 235–260. https://doi.org/10.11646/phytotaxa.357.4.1</p>
<p>Melo, J.I.M., Paulino, R.C. & Silva, F.V. (2007) Chave Ilustrada para os gêneros de Boraginaceae <em>senso lato</em> nativos do Brasil. <em>Caatinga</em> 20: 172–180.</p>
<p>Melo, J.I.M., Ranga, N.T. & Cavalheiro, L. (2013) Boraginaceae.<em> In</em>: Rizzo, J.A. (Ed.) <em>Flora dos Estados de Goiás e Tocantins – Coleção Rizzo</em>, vol. 43. Editora da Universidade Federal de Goiás, Goiânia, pp. 1–64.</p>
<p>Melo, J.L.M. & Lyra-Lemos, R.P. (2008) Sinopse taxonômica de Boraginaceae <em>sensu lato</em> A. Juss. no Estado de Alagoas, Brasil. <em>Acta Botanica Brasilica</em> 22: 701–710. https://doi.org/10.1590/S0102-33062008000300008</p>
<p>Nuttall, T. (1837) Collections towards a flora of the territory of Arkansas. <em>Transactions of the American Philosophical Society </em>5: 137–203. https://doi.org/10.2307/1004943</p>
<p>QGIS Development Team (2015) QGIS Geographic Information System version 2.8.2-Wien. Open Source Geospatial Foundation Project. Available from: http://www.qgis.org/ (accessed 7 January 2021)</p>
<p>Ranga, N.T., Melo, J.I.M. & Silva, L.C. (2012) Boraginaceae. <em>In</em>: Wanderley, M.G.L., Shepherd, G.J., Melhem, T.S., Giulietti, A.M. & Martins, S.E. (Eds.) <em>Flora Fanerogâmica do Estado de São Paulo.</em> Vol. 7. FAPESP/IBt, São Paulo, pp. 117–142.</p>
<p>Schrader, H.A. (1819) De asperifoliis Linnei comentatis recitata. <em>Commentationes Societatis Regiae Scientiarum Gottingensis Recentiores</em> 4: 175–196.</p>
<p>Small, J.K. (1933) <em>Manual of the southeastern flora</em>. New York, 1131 pp.</p>
<p>Watanabe, M.T.C. & Hiura, A.L. (2018) Flora das cangas da Serra dos Carajás, Pará, Brasil: Heliotropiaceae. <em>Rodriguésia</em> 69: 77–80. https://doi.org/10.1590/2175-7860201869108</p>
<p>Brown, R. (1810) <em>Prodromus Florae Novae Hollandiae et Insulae Van-Diemen, etc. </em>Nuremberg: L. Schrag.</p>
<p>Chamisso, L.K.A. von (1833) Spicilegium plantarum e familiis jam prius recensitis, praesertim Brasiliensium serius a Sellowio. Asperifoliae. <em>Linnaea</em> 8: 113–130.</p>
<p>Conceição, S.F. (2007) <em>A subfamília Heliotropioideae (Boraginaceae Juss.) no estado da Bahia</em>. <em>Dissertação de Mestrado</em>, Universidade Estadual de Feira de Santana, Feira de Santana, 138 pp.</p>
<p>Diane, N., Hilger, H.H., Förther, H., Weigend, M. & Luebert, F. (2016) Heliotropiaceae. <em>In</em>: V. Bittrich & J.W. Kadereit (Eds.) <em>Flowering Plants. Eudicots - The Families and Genera of Vascular Plants</em>. Vol. 2. Switzerland, Springer International Publishing, pp. 203–211. https://doi.org/10.1007/978-3-319-28534-4_17</p>
<p>Dubs, B. (1998) <em>Boraginaceae</em>. <em>In</em>: B. Dubs (Ed.) Prodromus Florae Matogrossensis. The Botany of Mato Grosso, Series B, 3. Küsnacht, Bertrona-Verlag, pp. 40–41.</p>
<p>Endlicher, S.F.L. (1839) <em>Genera plantarum secundum ordines naturales disposita.</em> Fr. Beck, Universitatis Bibliopolam, Wien, 1483 pp.</p>
<p>Fenzl, E. (1886) Vier neue Pflazennarten Süd-Amerikas. <em>Verhandlungen der Zoologisch- Botanischen Gesellschaft in Wien</em> 36: 287–289.</p>
<p>Förther, H. (1998) Die infragenerische Gliederung der Gattung <em>Heliotropium</em> L. und ihre Stellung innerhalb der subfam. Heliotropioideae (Schrad.) Arn. (Boraginaceae). <em>Sendtnera</em> 5: 35–241.</p>
<p>Fresenius, G. (1857) <em>Cordiaceae, Heliotropieae, Borragineae</em>. <em>In</em>: C.F.P. Martius, A.G. Eichler & I. Urban (Eds.) Flora Brasiliensis. v.8, pt. 1. Typographia Regia, Monachii, pp. 1–64.</p>
<p>Gray, A. (1874) Contributions to the botany of North America II: Notes on Boraginaceae. <em>Proceedings Academy of Arts and Sciences</em> 10: 48–61. https://doi.org/10.2307/20021413</p>
<p>Hilger, H.H. & Diane, N. (2003) A systematic analysis of Heliotropiaceae (Boraginales) based on trnL and ITS1 sequence data. <em>Botanische Jahrbücher für Systematik, Pflanzengeschichte und Pflanzengeographie </em>125: 19–51. https://doi.org/10.1127/0006-8152/2003/0125-0019</p>
<p>IUCN. (2012) <em>IUCN Red List Categories and Criteria</em>: version 3.1. Second edition. Gland, Switzerland and Cambridge, 32 pp.</p>
<p>Johnston, I.M. (1928) The South American species of <em>Heliotropium</em>. <em>Contributions from the Gray Herbarium of Harvard University</em> 81: 3–73.</p>
<p>JSTOR Global Plants (2021) JSTOR Global Plants. Available at: http://plants.jstor.org/ (accessed 11 June 2021)</p>
<p>Jussieu, A.L. de (1789) <em>Genera plantarum.</em> Herissant & T. Barrois, Paris, 498 pp.</p>
<p>Linnaeus, C. (1753) <em>Species Plantarum</em>. Laurentius Salvius, Stockholm, 1200 pp.</p>
<p>Melo, E. & França, F. (2003) Flora de Grão Mogol, Minas Gerais: Boraginaceae. <em>Boletim de Botânica da Universidade de São Paulo </em>21: 127–129. https://doi.org/10.11606/issn.2316-9052.v21i1p127-29</p>
<p>Melo, J.I.M. & Sales, M.F. (2004) <em>Heliotropium</em> L. (Boraginaceae: Heliotropioideae) de Pernambuco, Nordeste do Brasil. <em>Rodriguésia </em>55: 65–87. https://doi.org/10.1590/2175-78602004558405</p>
<p>Melo, J.I.M. & Semir, J. (2006) <em>Euploca rodaliae</em> J. I. M. Melo & Semir - a new species of <em>Euploca</em> (Heliotropiaceae) from Brazil. <em>Candollea</em> 61: 453–456.</p>
<p>Melo, J.I.M. & Semir, J. (2009) Two new Brazilian species and new combinations in <em>Euploca</em> (Heliotropiaceae) from Brazil. <em>Kew Bulletin</em> 64: 285–289. https://doi.org/10.1007/s12225-009-9109-3</p>
<p>Melo, J.I.M. & Semir, J. (2010) Taxonomia do gênero <em>Euploca</em> Nutt. (Heliotropiaceae) no Brasil. <em>Acta Botanica Brasilica</em> 24: 111–132. https://doi.org/10.1590/S0102-33062010000100012</p>
<p>Melo, J.I.M. (2012) Flora do Parque Nacional do Catimbau, Pernambuco, Brasil: Boraginaceae <em>sensu lato</em>. <em>Biotemas</em> 25: 109–120. https://doi.org/10.5007/2175-7925.2012v25n4p109</p>
<p>Melo, J.I.M. (2015) Synopsis of Boraginaceae <em>sensu lato </em>in the Caatingas of the São Francisco River, Northeastern Brazil. <em>Anales del Jardín Botánico de Madrid</em> 72 (1): e013. https://doi.org/10.3989/ajbm.2398</p>
<p>Melo, J.I.M., Paulino, R.C, Oliveira, R.C. & Vieira, D.D. (2018) Flora of Rio Grande do Norte, Brazil: Boraginales.<em> Phytotaxa</em> 357: 235–260. https://doi.org/10.11646/phytotaxa.357.4.1</p>
<p>Melo, J.I.M., Paulino, R.C. & Silva, F.V. (2007) Chave Ilustrada para os gêneros de Boraginaceae <em>senso lato</em> nativos do Brasil. <em>Caatinga</em> 20: 172–180.</p>
<p>Melo, J.I.M., Ranga, N.T. & Cavalheiro, L. (2013) Boraginaceae.<em> In</em>: Rizzo, J.A. (Ed.) <em>Flora dos Estados de Goiás e Tocantins – Coleção Rizzo</em>, vol. 43. Editora da Universidade Federal de Goiás, Goiânia, pp. 1–64.</p>
<p>Melo, J.L.M. & Lyra-Lemos, R.P. (2008) Sinopse taxonômica de Boraginaceae <em>sensu lato</em> A. Juss. no Estado de Alagoas, Brasil. <em>Acta Botanica Brasilica</em> 22: 701–710. https://doi.org/10.1590/S0102-33062008000300008</p>
<p>Nuttall, T. (1837) Collections towards a flora of the territory of Arkansas. <em>Transactions of the American Philosophical Society </em>5: 137–203. https://doi.org/10.2307/1004943</p>
<p>QGIS Development Team (2015) QGIS Geographic Information System version 2.8.2-Wien. Open Source Geospatial Foundation Project. Available from: http://www.qgis.org/ (accessed 7 January 2021)</p>
<p>Ranga, N.T., Melo, J.I.M. & Silva, L.C. (2012) Boraginaceae. <em>In</em>: Wanderley, M.G.L., Shepherd, G.J., Melhem, T.S., Giulietti, A.M. & Martins, S.E. (Eds.) <em>Flora Fanerogâmica do Estado de São Paulo.</em> Vol. 7. FAPESP/IBt, São Paulo, pp. 117–142.</p>
<p>Schrader, H.A. (1819) De asperifoliis Linnei comentatis recitata. <em>Commentationes Societatis Regiae Scientiarum Gottingensis Recentiores</em> 4: 175–196.</p>
<p>Small, J.K. (1933) <em>Manual of the southeastern flora</em>. New York, 1131 pp.</p>
<p>Watanabe, M.T.C. & Hiura, A.L. (2018) Flora das cangas da Serra dos Carajás, Pará, Brasil: Heliotropiaceae. <em>Rodriguésia</em> 69: 77–80. https://doi.org/10.1590/2175-7860201869108</p>