Abstract
Bauhinia orbiculata is a new species of Leguminosae found in the northern portion of the Chapada Diamantina mountain range in the state of Bahia, northeastern Brazil. It occurs in the seasonally dry shrubby vegetation locally known as ‘carrasco’, and is characterized by entire unifoliolate leaves with nine primary veins, rounded to obtuse apex and cordate base, dark ferruginous lower leaf surface, and linear and smooth floral buds. A detailed description, distribution map and illustrations are provided and its relationship with other eastern Brazilian species with entire leaves is discussed.
References
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<p>Thiers, B. (2022 [continuously updated]) <em>Index Herbariorum:</em> 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 24 September 2022)</p>
<p>Vaz, A.M.S. da F. & Lewis, G.P. (2015) Four new species of <em>Bauhinia</em> sect. <em>Pauletia</em> and a new description of <em>Bauhinia burchellii</em> Bentham (Leguminosae) from Brazil. <em>Phytotaxa </em>239 (3): 264–272. https://dx.doi.org/10.11646/phytotaxa.239.3.7</p>
<p>Vaz, A.M.S. da F. & Tozzi, A.M.G.A. (2003) <em>Bauhinia</em> ser. <em>Cansenia</em> (Leguminosae: Caesalpinioideae) no Brasil. <em>Rodriguésia</em> 54: 55–143. https://doi.org/10.1590/2175-78602003548305</p>
<p>Vaz, A.M.S.F. & Santos, A.C.B. (2022) <em>Bauhinia in Flora e Funga do Brasil.</em> Jardim Botânico do Rio de Janeiro. Available from: https://floradobrasil.jbrj.gov.br/FB22811 (accessed 24 September 2022)</p>
<p>Wunderlin, R.P., Larsen, K. & Larsen, S.S. (1987) Reorganization of the Cercideae (Fabaceae: Caesalpinioideae). <em>Biologiske Skrifter</em> 28: 1–40.</p>
<p>Barneby, R.C. (1985) The genus <em>Mimosa</em> (Mimosaceae) in Bahia, Brazil: New taxa and nomenclatural adjustments. <em>Brittonia</em> 37 (2): 125–153. https://doi.org/10.2307/2806089</p>
<p>Bisby, F.A. & Coddington, J. (1995) Biodiversity from a taxonomic and evolutionary perspective. <em>In: </em>Heywood, V.H. & Watson, R.T. (Eds.) <em>Global Biodiversity Assessment</em>. Cambridge University Press, Cambridge, pp. 27–56.</p>
<p>Candolle, A.P. de (1825) <em>Bauhinia</em> Section <em>Pauletia</em>. <em>Prodromus Systematis Naturalis Regni Vegetabilis</em> 2: 512.</p>
<p>Carvalho, M.L.S. & Queiroz, L.P. (2014) <em>Philcoxia tuberosa</em> (Plantaginaceae), a new species from Bahia, Brazil. <em>Neodiversity </em>7: 14–20. https://doi.org/10.13102/neod.71.3</p>
<p>Du Rietz, G.E. (1930) The fundamental units of biological taxonomy. <em>Svensk Botanisk Tidskrift </em>24: 333–428.</p>
<p>França, F. & Melo, E. de (2013). A complexidade da vegetação. <em>In:</em> França, F., Melo, E. de, Souza, I. & Pugliesi, L. (Eds.) <em>Flora de Morro do Chapéu</em>. vol. 1. UEFS, Feira de Santana, pp 17–19.</p>
<p>Guerra E, Morim, M.P. & Iganci, J.R.V. (2016) A new species of <em>Abarema</em> (Fabaceae) from Brazil. <em>Phytotaxa</em> 289 (1): 77–82. https://doi.org/10.11646/phytotaxa.289.1.6</p>
<p>Guimarães, E.F., Miguel, J.R. & Pereira, J.F. (1979) <em>Trigonia bahiensis</em> E.F.Guim., Miguel & Fontela. <em>Boletim Museu Botânico Municipal Curitiba</em> 36: 1–4.</p>
<p>Harley, R.M. (1995). Introduction. <em>In</em>: Stannard, B.L. (Eds.) <em>Flora of the Pico das Almas, Chapada Diamantina, Bahia, Brazil.</em> Royal Botanic Gardens, Kew. pp 1–39.</p>
<p>IUCN. (2012) <em>IUCN Red List Categories and Criteria:</em> Version 3.1. Second edition. Gland, Switzerland and Cambridge, IUCN, UK, iv + 32 pp.</p>
<p>Lewis, G.P. & Forest, F. (2005) Cercideae. <em>In</em>: Lewis, G., Schrire, B., Mackinder, B. & Lock, M. (Eds.) <em>Legumes of the World.</em> Richmond, U.K.: Royal Botanic Gardens, Kew, pp. 57–67</p>
<p>Linnaeus, C. (1753) <em>Species Plantarum</em>, vol. 1. Laurentius Salvius, Stockholm, 560 pp.</p>
<p>LPWG [Legume Phylogeny Working Group] (2017) A new subfamily classification of the Leguminosae based on a taxonomically comprehensive phylogeny. <em>Taxon </em>66: 44–77. https://doi.org/10.12705/661.3</p>
<p>Moricand, M.É. (1840) Plantes Nouvelles d’Amérique. <em>GeneÌve, Imprimerie de Jules-Gme Fich, Rue des Belles-Filles</em> 6: 77.</p>
<p>Queiroz, L.P. de, Oliveira, F.G., Cedraz, B., Melchor-Castro, R.R. & Fernandes, M.F. (2020) A new species of <em>Bauhinia</em> from coastal areas in Northeastern Brazil. <em>Phytotaxa</em> 435 (4): 293–300. https://doi.org/10.11646/phytotaxa.435.4.3</p>
<p>Roque, N., Ferreira, S.C. & Van Den Berg, C. (2017) <em>Lapidia</em>, a new monotypic genus of Asteraceae (Eupatorieae) from Brazil, and its phylogenetic placement. <em>Phytotaxa</em> 291 (1): 1–16. https://doi.org/10.11646/phytotaxa.291.1.1</p>
<p>Santos, A.C.B. dos, Queiroz, L.P. de, Paula, A.P.O. & Carvalho, R. de. (2022) A new species of <em>Bauhinia</em> ser. <em>Cansenia</em> (Cercidoideae, Leguminosae) endemic to the Atlantic Forest in the state of Bahia, Brazil. <em>Phytotaxa</em> 568 (2): 213–220. https://doi.org/10.11646/phytotaxa.568.2.6</p>
<p>Shorthouse, D.P. (2010) <em>SimpleMappr, an online tool to produce publication-quality point maps</em>. Available from: https://www.simplemappr.net/ (accessed 24 September 2022)</p>
<p>Sinou, C., Cardinal-Mcteague, W. & Bruneau, A. (2020) Testing generic limits in Cercidoideae (Leguminosae): Insights from plastid and duplicated nuclear gene sequences. <em>Taxon</em> 69 (1): 67–86. https://doi.org/10.1002/tax.12207</p>
<p>Thiers, B. (2022 [continuously updated]) <em>Index Herbariorum:</em> 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 24 September 2022)</p>
<p>Vaz, A.M.S. da F. & Lewis, G.P. (2015) Four new species of <em>Bauhinia</em> sect. <em>Pauletia</em> and a new description of <em>Bauhinia burchellii</em> Bentham (Leguminosae) from Brazil. <em>Phytotaxa </em>239 (3): 264–272. https://dx.doi.org/10.11646/phytotaxa.239.3.7</p>
<p>Vaz, A.M.S. da F. & Tozzi, A.M.G.A. (2003) <em>Bauhinia</em> ser. <em>Cansenia</em> (Leguminosae: Caesalpinioideae) no Brasil. <em>Rodriguésia</em> 54: 55–143. https://doi.org/10.1590/2175-78602003548305</p>
<p>Vaz, A.M.S.F. & Santos, A.C.B. (2022) <em>Bauhinia in Flora e Funga do Brasil.</em> Jardim Botânico do Rio de Janeiro. Available from: https://floradobrasil.jbrj.gov.br/FB22811 (accessed 24 September 2022)</p>
<p>Wunderlin, R.P., Larsen, K. & Larsen, S.S. (1987) Reorganization of the Cercideae (Fabaceae: Caesalpinioideae). <em>Biologiske Skrifter</em> 28: 1–40.</p>