Abstract
A new species of Pseudobombax (Bombacoideae, Malvaceae) is described from the Furados, Caatingas Domain, Brazil. The new species is morphologically similar to Pseudobombax simplicifolium but differs by the obovate, elliptic, depressed obovate or orbicular leaflets, the presence of branched trichomes on terminal branches, leaf primordia, petioles, adaxial and abaxial surfaces of leaflets, pedicel, bracteoles, and outer surface of the calyx, lepidote ovary, and the subglobose to ovoid, and spotted seeds.
References
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<p>Gianasi, F.M., Souza, C.R., Fagundes, N.C.A., Maia, V.A., Morel, J.D., Santos, P.F. & Santos, R.M. (2020) Environmental filtering both indirectly and directly drives the Dry Tropical Forest species composition and functional composition. <em>Ecological Research</em> 36 (1): 107–118. https://doi.org/10.1111/1440-1703.12178</p>
<p>Hewson, H.J. (2019) <em>Plant indumentum, a handbook of terminology, revised edition</em>. Australian Biological Resources Study, Commonwealth Department of the Environment and Energy, Australia, 47 pp.</p>
<p>IUCN (2019) <em>Guidelines for Using the IUCN Red List Categories and Criteria, version 14.</em> Prepared by the Standards and Petitions Committee, 113 pp.</p>
<p>Paula, G.G.P., Santos, R.M., Menino, G.C.O., Apgaua, D.M.G., Pereira, D.G.S.P., Souza, C.R. & Fontes, M.A.L. (2018) Influence of environmental variations on the formation of microhabitats within a fragment of Seasonally Dry Tropical Forest. <em>Revista Árvore</em> 42 (2): 1–10. https://doi.org/10.1590/1806-90882018000200011</p>
<p>Radford, A.E., Dikcson, W.C., Massei, J.R. & Bell, C.R. (1974) <em>Vascular Plant Systematics</em>. HarperCollins, New York, 891 pp.</p>
<p>Robyns, A. (1963) Essai de monographie du genre Bombax s.l. (Bombacaceae). <em>Bulletin du Jardin botanique de l’État a Bruxelles</em> 33 (1): 1–144. https://doi.org/10.2307/3667210</p>
<p>Saint-Hilaire, A., Cambessedes, J. & Jussieu, A. (1825) <em>Flora Brasiliae meridionalis</em>. Paris, 395 pp. https://doi.org/10.5962/bhl.title.45474</p>
<p>Santos, R.M., Oliveira-Filho, A.T., Eisenlohr, P.V., Queiroz, L.P., Cardoso, D.B.O.S. & Rodal, M.J.N. (2012) Identity and relationships of the Arboreal Caatinga among other floristic units of seasonally dry tropical forests (SDTFs) of north-eastern and Central Brazil. <em>Ecology and Evolution</em> 2 (2): 409–428. https://doi.org/10.1002/ece3.91</p>
<p>Souza, C.R., Morel, J.D., Santos, A.B.M., Silva, W.B., Maia, V.A., Coelho, P.A., Rezende, V.L. & Santos, R.M. (2020) Small-scale edaphic heterogeneity as a floristic-structural complexity driver in Seasonally Dry Tropical Forests tree communities. <em>Journal of Forestry Research</em> 31: 2347–2357. https://doi.org/10.1007/s11676-019-01013-9</p>
<p>Bachman, S., Moat, J., Hill, A.W., Torre, J. & Scott, B. (2011) Supporting red list threat assessments with GeoCAT: Geospatial conservation assessment tool. <em>ZooKeys</em> 150: 117–126. https://doi.org/10.3897/zookeys.150.2109</p>
<p>Bocage, A.L. & Sales, M.F. (2002) A família Bombacaceae Kunth no estado de Pernambuco, Brasil. <em>Acta Botanica Brasilica</em> 16: 123–139. https://doi.org/10.1590/S0102-33062002000200001</p>
<p>Carvalho-Sobrinho, J., Queiroz, L. & Alverson, B. (2013b) Reinterpretation of the nomenclatural type of Pseudobombax heteromorphum (Malvaceae, Bombacoideae) reveals an overlooked new species from Bolivia. <em>PhytoKeys</em> 21: 53–61. https://doi.org/10.3897/phytokeys.21.5213</p>
<p>Carvalho-Sobrinho, J.G. (2006) <em>O gênero Pseudobombax Dugand (Malvaceae sl, Bombacoideae) no Estado da Bahia, Brasil</em>. Universidade Estadual de Feira de Santana, Feira de Santana, 155pp.</p>
<p>Carvalho-Sobrinho, J.G., Alverson, W.S., Alcantara, S., Queiroz, L.P., Mota, A.C. & Baum, D.A. (2016) Revisiting the phylogeny of Bombacoideae (Malvaceae): Novel relationships, morphologically cohesive clades, and a new tribal classification based on multilocus phylogenetic analyses. <em>Molecular Phylogenetics and Evolution</em> 101: 56–74. https://doi.org/10.1016/j.ympev.2016.05.006</p>
<p>Carvalho-sobrinho, J.G. (2010) Three New Species of Pseudobombax ( Malvaceae , Bombacoideae ) from Brazil. <em>Novon</em> 20: 13–20. https://doi.org/10.3417/2007054</p>
<p>Carvalho-Sobrinho, J.G. de & Queiroz, L.P. (2011) Morphological cladistic analysis of Pseudobombax Dugand (Malvaceae, Bombacoideae) and allied genera. <em>Brazilian Journal of Botany</em> 34: 197–209. https://doi.org/10.1590/s0100-84042011000200007</p>
<p>Carvalho-Sobrinho, J.G., Queiroz, L.P. & Dorr, L.J. (2013a) Does Pseudobombax have prickles? Assessing the enigmatic species Pseudobombax endecaphyllum (Malvaceae: Bombacoideae). <em>Taxon</em> 62: 814–818. https://doi.org/10.12705/624.30</p>
<p>Carvalho-Sobrinho, J.G., Ramella, L., Queiroz, L.P. & Dorr, L.J. (2014) Towards a revision of Pseudobombax Dugand (Malvaceae- Bombacoideae): typification of names published by E. Hassler and R. Chodat in the related genus Bombax L. <em>Candollea</em> 69: 93–99. https://doi.org/10.15553/c2014v691a12</p>
<p>Carvalho-Sobrinho, J.G. & Yoshikawa, V.. (2020) Pseudobombax in Flora do Brasil 2020. <em>Jardim Botânico do Rio de Janeiro</em>. Available from: http://reflora.jbrj.gov.br/ (March 16, 2021)</p>
<p>DRYFLOR (2016) Plant diversity patterns in neotropical dry forests and their conservation implications. <em>Science</em> 353: 1383–1387. https://doi.org/10.1126/science.aaf5080</p>
<p>Dugand, A. (1943) Revalidacion de Bombax ceiba L. como especie tipica del genera Bombax BOMBAX L. y descripciond de Pseudobombax Gen. Nov. <em>Caldasia</em> 2: 47–68. [https://www.jstor.org/stable/43405801]</p>
<p>Fernández-Alonso, J.L. (2001) Bombacaceae Neotropicae novae vel minus cognitae v. novedades en Pseudobombax Dugand y sinopsis de las especies colombianas. <em>Botánica</em> 25: 467–476.</p>
<p>Figueiredo, S.S., Monteiro, F.K.S. & Melo, J.I.M. (2020) Flora of Paraíba, Brazil: Bombacoideae burnett (malvaceae). <em>Biota Neotropica</em> 20: 1–18. https://doi.org/10.1590/1676-0611-BN-2019-0837</p>
<p>Gianasi, F.M., Souza, C.R., Fagundes, N.C.A., Maia, V.A., Morel, J.D., Santos, P.F. & Santos, R.M. (2020) Environmental filtering both indirectly and directly drives the Dry Tropical Forest species composition and functional composition. <em>Ecological Research</em> 36 (1): 107–118. https://doi.org/10.1111/1440-1703.12178</p>
<p>Hewson, H.J. (2019) <em>Plant indumentum, a handbook of terminology, revised edition</em>. Australian Biological Resources Study, Commonwealth Department of the Environment and Energy, Australia, 47 pp.</p>
<p>IUCN (2019) <em>Guidelines for Using the IUCN Red List Categories and Criteria, version 14.</em> Prepared by the Standards and Petitions Committee, 113 pp.</p>
<p>Paula, G.G.P., Santos, R.M., Menino, G.C.O., Apgaua, D.M.G., Pereira, D.G.S.P., Souza, C.R. & Fontes, M.A.L. (2018) Influence of environmental variations on the formation of microhabitats within a fragment of Seasonally Dry Tropical Forest. <em>Revista Árvore</em> 42 (2): 1–10. https://doi.org/10.1590/1806-90882018000200011</p>
<p>Radford, A.E., Dikcson, W.C., Massei, J.R. & Bell, C.R. (1974) <em>Vascular Plant Systematics</em>. HarperCollins, New York, 891 pp.</p>
<p>Robyns, A. (1963) Essai de monographie du genre Bombax s.l. (Bombacaceae). <em>Bulletin du Jardin botanique de l’État a Bruxelles</em> 33 (1): 1–144. https://doi.org/10.2307/3667210</p>
<p>Saint-Hilaire, A., Cambessedes, J. & Jussieu, A. (1825) <em>Flora Brasiliae meridionalis</em>. Paris, 395 pp. https://doi.org/10.5962/bhl.title.45474</p>
<p>Santos, R.M., Oliveira-Filho, A.T., Eisenlohr, P.V., Queiroz, L.P., Cardoso, D.B.O.S. & Rodal, M.J.N. (2012) Identity and relationships of the Arboreal Caatinga among other floristic units of seasonally dry tropical forests (SDTFs) of north-eastern and Central Brazil. <em>Ecology and Evolution</em> 2 (2): 409–428. https://doi.org/10.1002/ece3.91</p>
<p>Souza, C.R., Morel, J.D., Santos, A.B.M., Silva, W.B., Maia, V.A., Coelho, P.A., Rezende, V.L. & Santos, R.M. (2020) Small-scale edaphic heterogeneity as a floristic-structural complexity driver in Seasonally Dry Tropical Forests tree communities. <em>Journal of Forestry Research</em> 31: 2347–2357. https://doi.org/10.1007/s11676-019-01013-9</p>