<?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>S2007-42982022000401102</article-id>
<article-id pub-id-type="doi">10.17129/botsci.3086</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[A phytogeographic assessment of the Sierra Madre Oriental physiographic province, Mexico]]></article-title>
<article-title xml:lang="es"><![CDATA[Una evaluación fitogeográfica de la provincia fisiográfica de la Sierra Madre Oriental, México]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Villaseñor]]></surname>
<given-names><![CDATA[José Luis]]></given-names>
</name>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ortiz]]></surname>
<given-names><![CDATA[Enrique]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Nacional Autónoma de México Instituto de Biología Departamento de Botánica]]></institution>
<addr-line><![CDATA[ Ciudad de México]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2022</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2022</year>
</pub-date>
<volume>100</volume>
<numero>4</numero>
<fpage>1102</fpage>
<lpage>1123</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-42982022000401102&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-42982022000401102&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-42982022000401102&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Background: Different regionalizations have been proposed for the Sierra Madre Oriental (SMOR), but none of them have analyzed its full floristic diversity.  Hypothesis: The geographical distribution of the vascular plant species of the SMOR allows the identification of floristic regions with unique species that identify them as biogeographic units.  Studied species: Vascular plants.  Study site: Sierra Madre Oriental physiographic province, Mexico.  Methods: Plant species distribution was analyzed in 1 × 1° latitude and longitude grid cells. Characteristic species (those with half or more of their known geographical distribution in Mexico in the SMOR) were identified, and a classification method was applied to distinguish biogeographic regions.  Results:  8,472 species were recorded in the Sierra Madre Oriental, 3,433 of them considered characteristics, of which 2,158 are endemic to Mexico and 585 are considered strictly endemic to the province. The portions of the SMOR in the states of Coahuila, Nuevo León, Tamaulipas, and San Luis Potosí have a higher species richness and this richness decreases towards the south of the province. Five floristic districts were identified within the SMOR.  Conclusions: The phytogeographic analysis carried out and its comparison with other regionalizations shows there is still disagreement in the biogeographic delimitation of the Sierra Madre Oriental and to achieve this goal it is necessary to include neighboring provinces in the analyzes, which will allow to identify their unique species and define their biogeographic limits in a more precise way.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Antecedentes: Existen diferentes regionalizaciones para la Sierra Madre Oriental, pero ninguna de ellas ha analizado toda su diversidad florística.  Hipótesis: La distribución geográfica de las especies de plantas vasculares de la SMOR permite identificar regiones florísticas con especies que las identifican como unidades biogeográficas.  Especies de estudio: Plantas vasculares.  Sitio de estudio: Provincia fisiográfica de la Sierra Madre Oriental, México.  Métodos:  Se analizó la distribución de las especies en cuadros de 1 × 1° de latitud y longitud. Se identificaron las especies características (con la mitad o más de su distribución conocida en México dentro de la SMOR) y se aplicó un método de clasificación para identificar regiones biogeográficas.  Resultados: Se registraron 8,472 especies en la Sierra Madre Oriental, siendo características de ellas 3,433 especies, entre las cuales 2,158 son endémicas de México y 585 son consideradas endémicas estrictas de la provincia. Las porciones de la Sierra Madre Oriental en los estados de Coahuila, Nuevo León, Tamaulipas y San Luis Potosí tienen una mayor riqueza de especies y esta disminuye hacia el sur de la provincia. Se identificaron cinco distritos florísticos al interior de la Sierra Madre Oriental.  Conclusiones: El análisis fitogeográfico realizado y su comparación con otras regionalizaciones muestra que aún existe un disenso en la delimitación biogeográfica de la Sierra Madre Oriental y que para lograrlo es necesario incluir en los análisis a las provincias vecinas, lo que permitirá identificar de manera clara las especies características de cada una y definir con precisión sus límites biogeográficos.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Biogeography]]></kwd>
<kwd lng="en"><![CDATA[floristic districts]]></kwd>
<kwd lng="en"><![CDATA[endemism]]></kwd>
<kwd lng="en"><![CDATA[mountains]]></kwd>
<kwd lng="en"><![CDATA[regionalization]]></kwd>
<kwd lng="es"><![CDATA[Biogeografía]]></kwd>
<kwd lng="es"><![CDATA[distritos florísticos]]></kwd>
<kwd lng="es"><![CDATA[endemismo]]></kwd>
<kwd lng="es"><![CDATA[flora]]></kwd>
<kwd lng="es"><![CDATA[montañas]]></kwd>
<kwd lng="es"><![CDATA[regionalización]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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