<?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>1405-2768</journal-id>
<journal-title><![CDATA[Polibotánica]]></journal-title>
<abbrev-journal-title><![CDATA[Polibotánica]]></abbrev-journal-title>
<issn>1405-2768</issn>
<publisher>
<publisher-name><![CDATA[Instituto Politécnico Nacional, Escuela Nacional de Ciencias Biológicas]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1405-27682024000100001</article-id>
<article-id pub-id-type="doi">10.18387/polibotanica.57.1</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Caracteristicas taxonómicas de las especies de Colubrina (Rhamnaceae) en México, basadas en la arquitectura y superficies epidérmicas]]></article-title>
<article-title xml:lang="en"><![CDATA[Taxonomic characteristics of Colubrina species (Rhamnaceae) in Mexico, based on foliar architecture and epidermal surfaces.]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Fernández-Nava]]></surname>
<given-names><![CDATA[Rafael]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Arreguín-Sánchez]]></surname>
<given-names><![CDATA[María de la Luz]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Jorge Cruz]]></surname>
<given-names><![CDATA[Coral Yamileth]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Instituto Politécnico Nacional Escuela Nacional de Ciencias Biológicas Departamento de Botánica]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2024</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2024</year>
</pub-date>
<numero>57</numero>
<fpage>1</fpage>
<lpage>22</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1405-27682024000100001&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1405-27682024000100001&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1405-27682024000100001&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Se describe e ilustra la arquitectura y las superficies epidérmicas de: Colubrina angustior (M. C. Johnston) Nesom, C. greggii S. Wats., C. lanulosa (M. C. Johnston) Fernández &amp; Arreguín, C. macrocarpa (Cav.) G. Don var. macrocarpa, C. stricta Engelm. ex Blankinship, C. texensis (Torrey &amp; Gray) A. Gray y C. yucatanensis (M. C. Johnston) Nesom, pertenecientes a la Familia Rhamnaceae. Los caracteres usados para la separación de los taxones fueron los diferentes tipos de venación, la inserción de los tricomas, forma de las células epidérmicas y paredes de las mismas en las superficies adaxial y abaxial, la presencia o ausencia de venas libres en las venas de tercera y cuarta categoría, así como los tipos de estomas; en ninguno de los taxones se encontraron glándulas en los dientes marginales. Además de las descripciones y fotomicrografías de los taxones se elaboró una clave dicotómica para diferenciar las especies y variedades. Así también se propone que C. macrocarpa var. lanulosa tenga un estatus de especie nueva, debido a que se encontraron diferencias marcadas con la variedad tipo de C. macrocarpa var. macrocarpa; se propone a Colubrina lanulosa (M. C. Johnston) Fernández &amp; Arreguín, comb. et stat. nov.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract The architecture and epidermal surfaces of: Colubrina angustior (M. C. Johnston) Nesom, C. greggii S. Wats., C. lanulosa (M. C. Johnston) Fernández &amp; Arreguín, C. macrocarpa (Cav.) G. Don var. macrocarpa, C. stricta Engelm. ex Blankinship, C. texensis (Torrey &amp; Gray) A. Gray and C. yucatanensis (M. C. Johnston) Nesom, belonging to the Family Rhamnaceae are described and illustrated. The characters used for the separation of the taxa were the different types of venation, the insertion of the trichomes, the shape of the epidermal cells and their walls on the adaxial and abaxial surfaces, the presence or absence of free veins in the veins of third and fourth category, as well as the types of stomata; in none of the taxa were glands found in the marginal teeth. In addition to the descriptions and photomicrographs of the taxa, a dichotomous key was developed to differentiate the species and varieties. It is also proposed that C. macrocarpa var. lanulosa has a status of new species, because marked differences were found with the type variety of C. macrocarpa var. macrocarpa; Colubrina lanulosa (M. C. Johnston) Fernández &amp; Arreguín is proposed as comb. et stat. nov.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[morfología de las hojas]]></kwd>
<kwd lng="es"><![CDATA[venación foliar]]></kwd>
<kwd lng="es"><![CDATA[clave dicotómica]]></kwd>
<kwd lng="es"><![CDATA[especie nueva]]></kwd>
<kwd lng="es"><![CDATA[subgénero Serratifolia]]></kwd>
<kwd lng="en"><![CDATA[leaf morphology]]></kwd>
<kwd lng="en"><![CDATA[leaf venation]]></kwd>
<kwd lng="en"><![CDATA[dichotomous key]]></kwd>
<kwd lng="en"><![CDATA[new species]]></kwd>
<kwd lng="en"><![CDATA[subgenus Serratifolia]]></kwd>
</kwd-group>
</article-meta>
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</back>
</article>
