<?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>S2007-42982020000400644</article-id>
<article-id pub-id-type="doi">10.17129/botsci.2623</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Estudio florístico de la microcuenca del Cañón de Los Chivos, San Luis Potosí, México]]></article-title>
<article-title xml:lang="en"><![CDATA[Floristic study of the microbasin of the Los Chivos Canyon, San Luis Potosi, Mexico]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Morales]]></surname>
<given-names><![CDATA[Jaime Iván]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Castillo-Lara]]></surname>
<given-names><![CDATA[Pedro]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Puente-Martinez]]></surname>
<given-names><![CDATA[Raúl]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[De-Nova]]></surname>
<given-names><![CDATA[José Arturo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Autónoma de San Luis Potosí Instituto de Investigación de Zonas Desérticas ]]></institution>
<addr-line><![CDATA[San Luis Potosí S.L.P.]]></addr-line>
<country>México</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Autónoma de San Luis Potosí Facultad de Agronomía y Veterinaria ]]></institution>
<addr-line><![CDATA[Soledad de Graciano Sánchez S.L.P.]]></addr-line>
<country>México</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Desert Botanical Garden  ]]></institution>
<addr-line><![CDATA[Phoenix AZ]]></addr-line>
<country>EE.UU</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2020</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2020</year>
</pub-date>
<volume>98</volume>
<numero>4</numero>
<fpage>644</fpage>
<lpage>681</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-42982020000400644&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-42982020000400644&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-42982020000400644&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Antecedentes:  Los ecosistemas de montaña resguardan una alta biodiversidad. La microcuenca del Cañón de Los Chivos es un eslabón importante para la biodiversidad de la Sierra Madre Oriental y un refugio para los ecosistemas de montaña de la región.  Pregunta: ¿Cuál es la composición y riqueza de plantas vasculares de la microcuenca del Cañón de Los Chivos, formas de crecimiento, distribución por tipo de vegetación, endemismo y estado de conservación?  Sitio de estudio y fechas:  Microcuenca del Cañón de Los Chivos, sierra de Álvarez, San Luis Potosí, México, febrero de 2016 a junio de 2019.  Métodos:  Se realizaron recolectas botánicas por tipo de vegetación, en un gradiente de 1,437 a 2,702 m snm. Se tomaron datos sobre el hábitat, fenología y forma de crecimiento.  Resultados:  Se registraron 104 familias, 327 géneros y 545 especies de plantas vasculares. Las familias más ricas son Asteraceae, Fabaceae, Orchidaceae, Poaceae y Cactaceae. El área incluye 181 especies endémicas de México y 24 de San Luis Potosí y regiones adyacentes. Once especies se enlistan en la NOM-059-SEMARNAT (SEMARNAT 2010), 84 en la IUCN (seis en una categoría amenazada) y 45 en la CITES. Seis especies representan nuevos registros para el estado.  Conclusiones:  La riqueza del área es relativamente mayor que en otras áreas con ecosistemas de montaña de la región. Su estado de conservación, así como la conexión con áreas naturales protegidas, endemismo y proporción de especies en categoría de riesgo, resaltan su importancia como área prioritaria para la conservación de estos ecosistemas en México.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Background: Mountain ecosystems shelter high levels of biodiversity. The microbasin of the Los Chivos Canyon is an important source of biodiversity of the Sierra Madre Oriental, and a refuge for mountain ecosystems in the region.  Question:  What is the composition and richness of vascular plants in the microbasin of the Los Chivos Canyon, growth forms, distribution of vegetation types, endemics, and conservation status.  Study site and research period:  The microbasin of the Los Chivos Canyon, Alvarez mountain range, San Luis Potosi, Mexico, between February 2016 and June 2019.  Methods:  Botanical collections were carried out in each vegetation type, along a gradient from 1,437 to 2,702 m asl. Data for habitat, phenology, and growth form were recorded.  Results:  104 families, 327 genera, and 545 species of vascular plants were recorded. The richest families are Asteraceae, Fabaceae, Orchidaceae, Poaceae, and Cactaceae. The area includes 181 species endemic to Mexico and 24 to San Luis Potosí and adjacent regions. Eleven species are included in the NOM-059-SEMARNAT-201045, 84 in the IUCN Redlist (six in a threatened category), and 45 in the CITES. There are six new records for the state.  Conclusions:  The species richness in the area is relatively higher than other areas having mountain ecosystems in the region. Its conservation status, as well as its proximity to natural protected areas, its endemism, and the proportion of species with some risk category, highlight the relevance of the area as a priority for the conservation of this ecosystems in Mexico.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Ecosistemas de montaña]]></kwd>
<kwd lng="es"><![CDATA[endemismo]]></kwd>
<kwd lng="es"><![CDATA[especies en riesgo]]></kwd>
<kwd lng="es"><![CDATA[florística]]></kwd>
<kwd lng="es"><![CDATA[vegetación]]></kwd>
<kwd lng="en"><![CDATA[Mountain ecosystems]]></kwd>
<kwd lng="en"><![CDATA[endemism]]></kwd>
<kwd lng="en"><![CDATA[endangered species]]></kwd>
<kwd lng="en"><![CDATA[floristics]]></kwd>
<kwd lng="en"><![CDATA[vegetation]]></kwd>
</kwd-group>
</article-meta>
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