<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>2007-4298</journal-id>
<journal-title><![CDATA[Botanical Sciences]]></journal-title>
<abbrev-journal-title><![CDATA[Bot. sci]]></abbrev-journal-title>
<issn>2007-4298</issn>
<publisher>
<publisher-name><![CDATA[Sociedad Botánica de México A.C.]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2007-42982023000300949</article-id>
<article-id pub-id-type="doi">10.17129/botsci.3300</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Centrosema flavescens (Fabaceae, Papilionoideae), a new species from the Yucatan Peninsula, Mexico]]></article-title>
<article-title xml:lang="es"><![CDATA[Centrosema flavescens (Fabaceae, Papilionoideae), una nueva especie de la península de Yucatán, México]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Carnevali Fernández-Concha]]></surname>
<given-names><![CDATA[Germán]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Angulo]]></surname>
<given-names><![CDATA[Diego F.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Tapia Muñoz]]></surname>
<given-names><![CDATA[José Luis]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ramírez Morillo]]></surname>
<given-names><![CDATA[Ivón M.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Duno De Stefano]]></surname>
<given-names><![CDATA[Rodrigo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Centro de Investigación Científica de Yucatán Unidad de Recursos Naturales Herbarirum CICY]]></institution>
<addr-line><![CDATA[Mérida Yucatán]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Harvard University  ]]></institution>
<addr-line><![CDATA[Cambridge Massachusetts]]></addr-line>
<country>USA</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>09</month>
<year>2023</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>09</month>
<year>2023</year>
</pub-date>
<volume>101</volume>
<numero>3</numero>
<fpage>949</fpage>
<lpage>958</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-42982023000300949&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-42982023000300949&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-42982023000300949&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Background: Centrosema (Fabaceae) includes 35-44 species in the New World, 10 in Mexico, and 9 in the Yucatan Peninsula. Most species have trifoliolate leaves and bicolored flowers. Unifoliolate leaves are an infrequent character that is found in a few species, e.g., C. sagittatum (Humb. &amp; Bonpl. ex Willd.) Brandegee, but monochromatic flowers, e.g., lacking nectar guides, is even a more unusual character state. Several populations of a Centrosema from the Yucatan Peninsula share both character states, a combination that sets them apart from other members of the genus.  Question:  Is the Centrosema with unifoliolate leaves, alate petioles, and monochromatic flowers of the Yucatan Peninsula, a species distinct from the phenetically similar C. sagittatum?  Studied species: Centrosema (Fabaceae, Papilionoideae).  Study site and dates:  Yucatan Peninsula, Mexico, 2021-2023.  Methods:  Botanical specimens were collected and determined taxonomically through the use of relevant literature, keys, and the consulting of botanical collections. The conservation status of the new species was assessed using the IUCN methodology.  Results: The specimens collected do represent an undescribed species that differs from Centrosema sagittatum by its smaller, cream-yellow, monochromatic flowers. The species is assessed as Endangered (EN).  Conclusions:  A new species, Centrosema flavescens from the Yucatan Peninsula is proposed. Eleven species of Centrosema are now recognized in Mexico, nine in the Yucatan Peninsula. C. sagittatum does not occur in the Yucatan Peninsula.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen:  Antecedentes: Centrosema (Fabaceae) es un género de 35-44 especies en el Nuevo Mundo, 10 en México y 9 en la península de Yucatán. La mayoría de las especies tienen hojas trifolioladas y flores bicolores. Las hojas unifolioladas son un carácter poco frecuente que se encuentra en pocas especies; p.ej. C. sagittatum (Humb. &amp; Bonpl. ex Willd.) Brandegee, pero las flores monocromáticas, que carecen de guías de néctar, es incluso un estado de carácter más inusual. Varias poblaciones de Centrosema de la península de Yucatán comparten ambos estados de carácter, una combinación que las separa de otras especies del género.  Pregunta:  ¿Es el Centrosema de hojas unifolioladas, pecíolos alados y flores monocromáticas de la península de Yucatán una especie diferente de la fenéticamente similar C. sagittatum?  Especies de estudio: Centrosema (Fabaceae, Papilionoideae).  Sitio de estudio y fecha de estudio:  Península de Yucatán, México, 2021-2023.  Métodos:  Se recolectaron especímenes botánicos y se determinaron taxonómicamente mediante el uso de literatura relevante, claves y la consulta de colecciones botánicas. El estado de conservación de la nueva especie se evaluó utilizando la metodología de la UICN.  Resultados:  Los especímenes colectados representan una especie no descrita que se diferencia de C. sagittatum por las flores cremosas, monocromáticas y más pequeñas. La especie es evaluada como En Peligro (EN).  Conclusiones:  Se describe una nueva especie, Centrosema flavescens, de la península de Yucatán. Se reconocen once especies de Centrosema en México y nueve en la península de Yucatán. Centrosema sagittatum no crece en la península de Yucatán.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Leguminosae]]></kwd>
<kwd lng="en"><![CDATA[Papilionoideae]]></kwd>
<kwd lng="en"><![CDATA[taxonomic novelty]]></kwd>
<kwd lng="en"><![CDATA[Yucatán]]></kwd>
<kwd lng="es"><![CDATA[Leguminosae]]></kwd>
<kwd lng="es"><![CDATA[novedad taxonómica]]></kwd>
<kwd lng="es"><![CDATA[Papilionoideae]]></kwd>
<kwd lng="es"><![CDATA[Yucatán]]></kwd>
</kwd-group>
</article-meta>
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