<?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>0187-7151</journal-id>
<journal-title><![CDATA[Acta botánica mexicana]]></journal-title>
<abbrev-journal-title><![CDATA[Act. Bot. Mex]]></abbrev-journal-title>
<issn>0187-7151</issn>
<publisher>
<publisher-name><![CDATA[Instituto de Ecología A.C., Centro Regional del Bajío]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0187-71512021000100151</article-id>
<article-id pub-id-type="doi">10.21829/abm128.2021.1974</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Aristolochia quiricoana (Aristolochiaceae), a new species from southern Costa Rica]]></article-title>
<article-title xml:lang="es"><![CDATA[Aristolochia quiricoana (Aristolochiaceae), una nueva especie del sur de Costa Rica]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Jiménez]]></surname>
<given-names><![CDATA[José Esteban]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Cedeño-Fonseca]]></surname>
<given-names><![CDATA[Marco]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Blanco]]></surname>
<given-names><![CDATA[Mario A.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de Costa Rica Centro de Investigación en Biodiversidad y Ecología Tropical ]]></institution>
<addr-line><![CDATA[San José ]]></addr-line>
<country>Costa Rica</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Técnica Nacional  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Costa Rica</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Freie Universität Berlin  ]]></institution>
<addr-line><![CDATA[Berlin ]]></addr-line>
<country>Germany</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Universidad de Costa Rica Centro de Investigación en Biodiversidad y Ecología Tropical ]]></institution>
<addr-line><![CDATA[San José ]]></addr-line>
<country>Costa Rica</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2021</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2021</year>
</pub-date>
<numero>128</numero>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0187-71512021000100151&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0187-71512021000100151&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0187-71512021000100151&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract:  Background and Aims: Aristolochia is the largest genus in Aristolochiaceae and is widely distributed in the world. A recent synopsis of Aristolochia in Costa Rica recognized 19 species; nevertheless, recent botanical exploration in southwestern Costa Rica has revealed yet another new species of this genus.  Methods:  The new species resulted from fieldwork in Buenos Aires, Puntarenas Province. Specimens from several herbaria were examined, as well as the type material of the most morphologically similar species. Comments about its distribution, habitat, phenology, conservation status and morphological distinction from related species are provided.  Key results: Aristolochia quiricoana, a member of Aristolochia series Thyrsicae, is described and illustrated from the southern Pacific region of Costa Rica, where it is apparently endemic. It is similar to A. ornithorhyncha, from which it is distinguished by its shorter pedicels, wider, oblong perigone limbs with a shorter appendix, and a different floral color pattern.  Conclusions:  The new taxon described here represents the 22nd species documented in Aristolochia series Thyrsicae, as well as the 20th species of the genus from Costa Rica.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen:  Antecedentes y Objetivos: Aristolochia es el género más grande de Aristolochiaceae y está ampliamente distribuido en el mundo. Una sinopsis reciente de Aristolochia en Costa Rica reconoció 19 especies; sin embargo, una reciente exploración botánica en la parte suroeste de Costa Rica ha revelado otra nueva especie del género.  Métodos:  La nueva especie resultó del trabajo de campo en Buenos Aires, Provincia de Puntarenas. Se examinaron ejemplares de varios herbarios, así como el material tipo de las especies más similares morfológicamente. Se proporcionan comentarios sobre su distribución, hábitat, fenología, estado de conservación y distinción morfológica de especies relacionadas.  Resultados clave: Aristolochia quiricoana, miembro de Aristolochia serie Thyrsicae, se describe e ilustra de la región del Pacífico sur de Costa Rica, donde aparentemente es endémica. Es semejante a A. ornithorhyncha, de la cual se distingue por sus pedicelos más cortos, los limbos del perigonio más anchos y oblongos, con un apéndice más corto, y un patrón diferente de colores de la flor.  Conclusiones: El nuevo taxón descrito aquí representa la 22ª especie documentada de Aristolochia serie Thyrsicae, así como la 20ª especie del género para Costa Rica.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Aristolochia chapmaniana]]></kwd>
<kwd lng="en"><![CDATA[Aristolochia ornithorhyncha]]></kwd>
<kwd lng="en"><![CDATA[endemic species]]></kwd>
<kwd lng="en"><![CDATA[flora of Costa Rica]]></kwd>
<kwd lng="en"><![CDATA[taxonomy]]></kwd>
<kwd lng="es"><![CDATA[Aristolochia chapmaniana]]></kwd>
<kwd lng="es"><![CDATA[Aristolochia ornithorhyncha]]></kwd>
<kwd lng="es"><![CDATA[especie endémica]]></kwd>
<kwd lng="es"><![CDATA[flora de Costa Rica]]></kwd>
<kwd lng="es"><![CDATA[taxonomía]]></kwd>
</kwd-group>
</article-meta>
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