Abstract
Dichorisandra rigidifolia, a new species of the genus and probably endemic to the Cerrado Phytogeographic Domain, is described and illustrated here. Comments on its habitat, distribution, phenology, and conservation status are provided, as well as information concerning its morphological relationships with similar congeners. The new species can be recognized by its erect habit, leaves firmly chartaceous, bracts of the cincinni and bracteoles persistent, flowers with petals lilac or pinkish from the middle third, androecium with six fertile stamens, the thecae lilac or pink with two apical pores, as well as globose, blackish, and smooth capsules.
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<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Aona, L.Y.S., Faden, R.B., Bittrich, V. & Amaral, M.C.E. (2016b) Four new species of <em>Dichorisandra</em> (Commelinaceae) endemic from Bahia State. <em>Brittonia</em> 68: 61–73. https://doi.org/10.11646/phytotaxa.48.1.2</span></span></span></p>
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<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Aona-Pinheiro, L.Y.S. & Amaral, M.C.E. (2012) Four new species of <em>Dichorisandra</em> J.C.Mikan (Commelinaceae) from Southeast Brazil. <em>Phytotaxa</em> 48: 7–22. https://doi.org/10.11646/phytotaxa.48.1.2</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Aona-Pinheiro, L.Y.S., Bittrich, V. & Amaral, M.C.E. (2014) Two new species of <em>Dichorisandra</em> (Commelinaceae) from Rio de Janeiro and comments on the two species included in Vellozo’s ‘Flora Fluminensis’. <em>Phytotaxa</em> 184: 223–234. https://dx.doi.org/10.11646/phyotaxa.184.4.3</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Aona, L.Y.S., Souza, E.H., Almeida Junior, R.A.C., Marinho, L.C., Bittrich, V. & Amaral, M.C.E. (2022) <em>Dichorisandra rhizantha</em> (Commelinaceae), a new morphologically unusual species from Bahia, Brazil. <em>Phytotaxa</em> 538: 257–264. https://doi.org/10.11646/phytotaxa.538.3.9</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Aparecido, L.M.T., Teodoro, G.S., Mosquera, G., Brum, M., Barros, F.V., Pompeu, P.V., Rodas, M., Lazo, P., Müller, C.S., Mulligan, M., Asbjornsen, H., Moore, G.W. & Oliveira, R.S. (2017) Ecohydrological drivers of Neotropical vegetation in montane ecosystems. <em>Ecohydrology</em> 11 (3 Special Issue: Emerging Issues in Tropical Ecohydrology), [e1932]. https://doi.org/10.1002/eco.1932</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Aublet, F. (1775) <em>Histoire des plantes de la Guiane Françoise, rangées suivant la méthode sexuelle, avec plusiers mémoires sur différens objets intéressans, relatifs à la culture & au commerce de la Guiane Françoise, & une notice des plantes de l’Isle-de-France</em>. Paris, P. F. Didot Jeune, 35 pp. https://dx.doi.org/10.5962/bhl.title.48831</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Brown, R. (1810) <em>Prodromus Florae Novae Hollandiae</em>. Taylor & Society, London, 270 pp.</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Clarke, C.B. (1881) Commelinaceae. <em>In</em>: De Candolle, A. (Ed.) <em>Monographiae Phanerogamarum</em>. vol. 3. Sumptibus G. Masson, Paris, p. 272–285.</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Clarke, C.B. (1902) Commelinaceae. <em>Bulletin of the torrey Botanical Club</em> 29: 1–703.</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Evans, T.M., Sytsma, K.J., Faden, R.B. & Givnish, T.J. (2003) Phylogenetic Relationships in the Commelinaceae: II. A Cladistic Analysis of rbcL Sequences and Morphology. <em>Systematic Botany</em> 28: 270–292. https://doi.org/10.1043/0363-6445-28.2.270</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Faden, R.B. & Hunt, D.R. (1991) The classification of the Commelinaceae. <em>Taxon</em> 40: 19–31. https://doi.org/10.2307/1222918</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Faden, R.B. (1998) Commelinaceae. <em>In</em>: <em>The families and genera of Vascular plants</em>, vol. 4, ed. K. Kubitzki. Berlin: Springer Verlarg. pp. 109–128.</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Govaerts, R. & Faden, R.B. (2011) <em>World checklist of Commelinaceae</em>. The Board of Trustees of the Royal Botanic Gardens, Kew. Available from: http://kew.org/wcsp/ (Accessed 5 March 2022)</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Felfili, J.M. (2007) A Chapada dos Veadeiros. <em>In</em>: Felfili, J.M., Rezende, A.V., Silva Júnior, M.C. (orgs.) <em>Biogeografia do bioma Cerrado: vegetação e solos da Chapada dos Veadeiros</em>. Brasília, DF: Ed. UnB, pp. 121–237.</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Gotsch, S.G., Nadkarni, N. & Amici, A. (2016) The functional roles of epiphytes and arboreal soils in tropical montane cloud forests. <em>Journal of Tropical Ecology</em> 32: 455–468. https://dx.doi.org/10.1017/S026646741600033X</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Grant, J.R. (2000) New Mesoamarican Species of <em>Dichorisandra</em> and <em>Tradescantia</em> sect. <em>Mandonia </em>(Commelinaceae). <em>Novon</em> 10: 117–123.</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">IUCN Standards and Petitions Committee (2019) Guidelines for Using the IUCN Red List Categories and Criteria. Version 14. Prepared by the Standards and Petitions Committee. Available from: http://www.iucnredlist.org/documents/RedListGuidelines.pdf (Accessed 28 January 2022)</span></span></span></p>
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