<?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>S2007-42982021000300717</article-id>
<article-id pub-id-type="doi">10.17129/botsci.2774</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Las afinidades meridionales de la flora de los bosques montanos de México]]></article-title>
<article-title xml:lang="en"><![CDATA[Southern affinities of the flora of Mexican montane forests]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rzedowski]]></surname>
<given-names><![CDATA[Jerzy]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Instituto de Ecología, A.C. Centro Regional del Bajío ]]></institution>
<addr-line><![CDATA[Pátzcuaro Michoacán]]></addr-line>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>09</month>
<year>2021</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>09</month>
<year>2021</year>
</pub-date>
<volume>99</volume>
<numero>3</numero>
<fpage>717</fpage>
<lpage>721</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-42982021000300717&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-42982021000300717&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-42982021000300717&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Antecedentes:  En la flora de los bosques de coníferas, encinos y mesófilos de montaña de México destacan los elementos fitogeográficos septentrional y meridional; este último se analiza en la presente contribución.  Pregunta:  ¿En cuál de los tipos de vegetación enumerados es más manifiesta la afinidad florística meridional?  Grupo estudiado:  Fanerógamas (Spermatophyta).  Área de estudio:  Principalmente México y Sudamérica.  Métodos:  Se realizó la revisión de literatura para integrar una lista de géneros de la flora de nuestro país de distribución esencialmente restringida al continente americano y que están más diversificados en Sudamérica que en México. Se depuró con la consulta de revisiones taxonómicas y de estudios de la filogenia; se aceptaron solamente los de probable origen en el hemisferio sur y pertenecientes a familias de la misma procedencia.  Resultados:  Se completó un catálogo de 84 géneros para 39 familias. Para cada uno se proporciona el número de especies conocidas en total y las presentes en México. Se señala su distribución geográfica, mediante la definición de sus extremos boreal y austral.  Conclusiones:  Con base en la lista fue posible definir que a) la afinidad meridional es más pronunciada en la flora del bosque mesófilo de montaña que en los de coníferas y encino. b) la mayor parte de los elementos australes encuentra el límite de su distribución en el centro de México, algunos en Chiapas y pocos hasta Canadá. c) Aunque es probable que el arribo de algunos es relativamente reciente, otros estuvieron presentes en México al menos desde el Mioceno temprano.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Background:  Among the flora of the Mexican conifer, oak, and cloud forests, the northern and southern phytogeographic elements stand out; the latter is analyzed in the current contribution.  Question:  In which of the types of vegetation mentioned above are the southern floristic affinities strongest?  Study group:  Phanerogams (Spermatophytes).  Study site:  Essentially, Mexico and South America.  Methods:  A detailed bibliographic review was conducted to prepare a list of Mexican genera that are essentially restricted to the Americas and possess greater diversity in South America than in Mexico. Using pertinent taxonomic revisions and phylogenetic studies, only those genera that have a likely origin in the Southern Hemisphere and belong to families originating in this region are included.  Results:  A catalogue of 84 genera belonging to 39 families of phanerogams is presented. For each genus, the total number of species and number of species in Mexico is provided. The known geographic distribution is also provided, defining the northern and southern limits.  Conclusions: Based on the list, the following can be inferred: a) Southern affinities are much stronger for the flora of cloud forests than for the floras of conifer or oak forests. b) Most of the southern elements reach their northern limit in central Mexico, some in the state of Chiapas and few extend to Canada. c) Although it is likely that some genera recently arrived in Mexico, many have been present since at least the Early Miocene.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Bosques]]></kwd>
<kwd lng="es"><![CDATA[fitogeografía]]></kwd>
<kwd lng="es"><![CDATA[México]]></kwd>
<kwd lng="es"><![CDATA[Sudamérica]]></kwd>
<kwd lng="en"><![CDATA[Forests]]></kwd>
<kwd lng="en"><![CDATA[Mexico]]></kwd>
<kwd lng="en"><![CDATA[phytogeography]]></kwd>
<kwd lng="en"><![CDATA[South America]]></kwd>
</kwd-group>
</article-meta>
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