<?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>S2007-42982024000100211</article-id>
<article-id pub-id-type="doi">10.17129/botsci.3344</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Coccoloba burkeae and C. najarroi, two new species of Coccoloba sect. Coccoloba (Polygonaceae) from Mexico]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ortiz-Díaz]]></surname>
<given-names><![CDATA[Juan Javier]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Tun-Garrido]]></surname>
<given-names><![CDATA[Juan]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ancona]]></surname>
<given-names><![CDATA[Juan José]]></given-names>
</name>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Autónoma de Yucatán Campus de Ciencias Biológicas y Agropecuarias Departamento de Botánica]]></institution>
<addr-line><![CDATA[Mérida Yucatán]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>03</month>
<year>2024</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>03</month>
<year>2024</year>
</pub-date>
<volume>102</volume>
<numero>1</numero>
<fpage>211</fpage>
<lpage>222</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-42982024000100211&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-42982024000100211&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-42982024000100211&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract:  Background: Coccoloba is a Neotropical genus of trees, shrubs, and lianas with approximately 150 species. Reviewed Mexican specimens of Coccoloba do not correspond to any recognized species within the genus, so they are proposed as new species.  Question: What are the morphological characteristics that differentiate the two new species from other Coccoloba species? What is its distribution and conservation status?  Studied species: Species of Coccoloba sect. Coccoloba endemic to Mexico.  Study site and dates:  Chiapas and Veracruz, Mexico, 2022-2023.  Methods: All available information for Coccoloba, including herbarium specimens and online databases, was reviewed. Subsequently, a comparative analysis was carried out including the two new species proposed and the recognized species in the genus. Geographic distribution maps were prepared and the conservation status of the new species was determined, following the IUCN guidelines.  Results: Coccoloba burkeae and C. najarroi are described and illustrated as new species. Both are endemic to Mexico. C. burkeae is distributed in the humid forests of the Tuxtlas region in Veracruz and is morphologically similar to C. barbadensis, C. hondurensis and C. spicata; this species is considered in the Endangered (EN) category. C. najarroi is restricted to the humid forests of Chiapas and is similar to C. ascendens and C. ibarrae. This species is considered Critically Endangered (CR).  Conclusions: The morphological characteristics of the fruit, the inflorescence and the leaves are important to diagnose the two new species of Coccoloba; both being endemic to Mexico.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen:  Antecedentes: Coccoloba es un género Neotropical de árboles, arbustos y lianas con aproximadamente 150 especies. Ejemplares mexicanos de Coccoloba revisados no corresponden a ninguna especie reconocida dentro del género, por lo que se proponen como especies nuevas.  Pregunta: ¿Cuáles son las características morfológicas que diferencian a las dos nuevas especies con respecto a otras especies de Coccoloba? ¿Cuál es su distribución y estado de conservación?  Especies de estudio: Especies de Coccoloba sect. Coccoloba endémicas de México.  Sitio de estudio: Chiapas y Veracruz, México, 2022-2023.  Métodos: Se revisó toda la información disponible para Coccoloba, incluyendo especímenes de herbario y bases de datos en línea. Posteriormente se realizó un análisis comparativo incluyendo las dos especies nuevas propuestas y las especies reconocidas. Se elaboraron mapas de distribución geográfica y se determinó el estatus de conservación de las especies nuevas, siguiendo las pautas de IUCN.  Resultados: Coccoloba burkeae y C. najarroi son descritas e ilustradas como especies nuevas. Ambas son endémicas de México. C. burkeae se distribuye en las selvas húmedas de la región de los Tuxtlas en Veracruz y es morfológicamente similar a C. barbadensis, C. hondurensis y C. spicata; esta especie es considerada en la categoría de En Peligro (EN). C. najarroi se restringe a las selvas húmedas de Chiapas y es similar a C. ascendens y C. ibarrae; es considerada como En Peligro Crítico (CR).  Conclusiones: Las características morfológicas del fruto, la inflorescencia y las hojas son importantes para diagnosticar las dos especies nuevas de Coccoloba; siendo ambas endémicas de México.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Endemism]]></kwd>
<kwd lng="en"><![CDATA[flora of Chiapas]]></kwd>
<kwd lng="en"><![CDATA[flora of Veracruz]]></kwd>
<kwd lng="en"><![CDATA[Mesoamerica]]></kwd>
<kwd lng="en"><![CDATA[tribe Coccolobeae]]></kwd>
<kwd lng="es"><![CDATA[Endemismo]]></kwd>
<kwd lng="es"><![CDATA[flora de Chiapas]]></kwd>
<kwd lng="es"><![CDATA[flora de Veracruz]]></kwd>
<kwd lng="es"><![CDATA[Mesoamérica]]></kwd>
<kwd lng="es"><![CDATA[tribu Coccolobeae]]></kwd>
</kwd-group>
</article-meta>
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