<?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>S2007-42982017000200245</article-id>
<article-id pub-id-type="doi">10.17129/botsci.780</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Reproductive ecology of the threatened "star cactus" Astrophytum ornatum (Cactaceae): a strategy of continuous reproduction with low success]]></article-title>
<article-title xml:lang="es"><![CDATA[Ecología reproductiva del &#8220;cactus estrella&#8221; Astrophytum ornatum (Cactaceae): una estrategia de reproducción continua con bajo éxito]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Matias-Palafox]]></surname>
<given-names><![CDATA[María Loraine]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Jiménez-Sierra]]></surname>
<given-names><![CDATA[Cecilia Leonor]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Golubov]]></surname>
<given-names><![CDATA[Jordan]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Mandujano]]></surname>
<given-names><![CDATA[María C.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Autónoma Metropolitana  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Autónoma Metropolitana Unidad Iztapalapa ]]></institution>
<addr-line><![CDATA[México, D.F. ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad Autónoma Metropolitana Unidad Xochimilco ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Universidad Nacional Autónoma de México Instituto de Ecología Departamento de Ecología de la Biodiversidad]]></institution>
<addr-line><![CDATA[México, D.F. ]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2017</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2017</year>
</pub-date>
<volume>95</volume>
<numero>2</numero>
<fpage>245</fpage>
<lpage>258</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-42982017000200245&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-42982017000200245&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-42982017000200245&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract:  Background:  There are no previous studies on the reproductive biology of the endemic and endangered cactus species Astrophytum ornatum.  Questions:  Is flowering continuous or episodic? What are the breeding and mating systems and what floral visitors are associated? and Does the reproductive success change over time?  Study species: Astrophytum ornatum (Cactaceae). Study site and years of study: Observations from 2010 to 2011, in the highest density population of A. ornatum in Metztitlán Canyon (Hgo. México).  Methods:  Monthly surveys and monitoring of reproductive structures. Tracking flowers in anthesis. Controlled pollinations to determine the mating system and determination of the Outcrossing Index (OCI), the pollen /ovule ratio and breeding system.  Results: Astrophytum ornatum produced flower buds throughout the year, but 89.2% of them were aborted. Four events of ephemeral flowering population were presented per year. The species is self-incompatible and controlled pollinations indicated pollinator limitation of several bee species. The OCI indicates that the species is facultative xenogamous, and pollen/ovule ratio indicates obligate xenogamy. On average there were 54 seeds/fruit and individuals produced 4 fruits/year.  Conclusions:  The continuous production of buds had rarely been reported for cacti. Intrapopulation bloom is one of the shortest recorded for the family and it produces high floral synchrony. The low number of seeds / fruit and flowers / individual, coupled with the narrow niche breadth of species and various anthropogenic factors place Astrophytum ornatum as a susceptible species to be extinct.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen:  Antecedentes: No existen estudios precisos sobre la biología reproductiva de Astrophytum ornatum, especie endémica y en riesgo.  Preguntas:  ¿Cómo es la fenología de la especie? ¿Cuáles son los sistemas de cruza y apareamiento? y ¿Cuál es el éxito reproductivo?  Especie de estudio: Astrophytum ornatum (Cactaceae). Sitio de estudio y fechas: Observaciones de 2010 a 2011 en la población más densa de A. ornatum en la Barranca de Metztitlán (Hgo. México).  Métodos:  Censos mensuales y seguimiento de estructuras reproductivas. Seguimiento de flores en antesis. Polinizaciones controladas para determinar el sistema de cruza y determinación del índice de entrecruza de Cruden (OCI) y de la relación polen/óvulo para estimar el sistema de apareamiento.  Resultados: Astrophytum ornatum produjo botones florales todo el año pero el 89.2% de ellos fueron abortados. Se presentaron cuatro eventos efímeros de floración poblacional/año. La especie es autoincompatible y las polinizaciones controladas indicaron escasez de polinizadores (abejas). La especie es xenógama facultativa según el OCI o xenógama obligada por la relación polen/óvulo. En promedio se producen 54 semillas/fruto y 4 frutos/individuo/año.  Conclusiones:  La producción continua de botones florales es un fenómeno raramente reportado para cactáceas. La floración intrapoblacional constituye uno de los registros más cortos para la familia y produce una alta sincronía floral. El bajo número de semillas/fruto y de flores/individuo, aunado a la amplitud restringida del nicho de la especie y a diversos factores antropogénicos sitúan a Astrophytum ornatum como especie susceptible de extinción.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[continuous production of flower buds]]></kwd>
<kwd lng="en"><![CDATA[reproductive success]]></kwd>
<kwd lng="en"><![CDATA[breeding system]]></kwd>
<kwd lng="en"><![CDATA[mating system]]></kwd>
<kwd lng="en"><![CDATA[phenology]]></kwd>
<kwd lng="es"><![CDATA[producción continua de botones florales]]></kwd>
<kwd lng="es"><![CDATA[éxito reproductivo]]></kwd>
<kwd lng="es"><![CDATA[sistema de apareamiento]]></kwd>
<kwd lng="es"><![CDATA[sistema de cruza]]></kwd>
<kwd lng="es"><![CDATA[fenología]]></kwd>
</kwd-group>
</article-meta>
</front><back>
<ref-list>
<ref id="B1">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Alvim]]></surname>
<given-names><![CDATA[P]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Moisture stress as a requirement for flowering of coffee]]></article-title>
<source><![CDATA[Science]]></source>
<year>1960</year>
<volume>132</volume>
<page-range>354</page-range></nlm-citation>
</ref>
<ref id="B2">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Anderson]]></surname>
<given-names><![CDATA[EF]]></given-names>
</name>
</person-group>
<source><![CDATA[The cactus family]]></source>
<year>2001</year>
<publisher-loc><![CDATA[Portland, OR ]]></publisher-loc>
<publisher-name><![CDATA[Timber]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B3">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Arias]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Guzmán]]></surname>
<given-names><![CDATA[U]]></given-names>
</name>
<name>
<surname><![CDATA[Mandujano]]></surname>
<given-names><![CDATA[MC]]></given-names>
</name>
<name>
<surname><![CDATA[Soto]]></surname>
<given-names><![CDATA[GM]]></given-names>
</name>
<name>
<surname><![CDATA[Golubov]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Las especies mexicanas de Cactáceas en riesgo de extinción. I. Una comparación entre los listados NOM-059-ECOL-2001 (México), la lista roja (UICN) y CITES]]></article-title>
<source><![CDATA[Cactáceas Suculentas Mexicanas]]></source>
<year>2005</year>
<volume>50</volume>
<page-range>100-25</page-range></nlm-citation>
</ref>
<ref id="B4">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Arroyo-Pérez]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
</person-group>
<source><![CDATA[Características de la historia de vida de Ariocarpus kotschoubeyanus (Cactaceae) en el Estado de Querétaro]]></source>
<year>2014</year>
<publisher-name><![CDATA[Universidad Autónoma Metropolitana]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B5">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Barrett]]></surname>
<given-names><![CDATA[SCH]]></given-names>
</name>
<name>
<surname><![CDATA[Eckert]]></surname>
<given-names><![CDATA[CG]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Variation and evolution of mating systems in seed plants]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[Kawano]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
</person-group>
<source><![CDATA[Biological approaches and evolutionary trends in plants]]></source>
<year>1990</year>
<page-range>229-54</page-range><publisher-loc><![CDATA[Great Yarmouth ]]></publisher-loc>
<publisher-name><![CDATA[Academic Press]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B6">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Bárcenas]]></surname>
<given-names><![CDATA[RT]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Comercio de cactáceas mexicanas y perspectivas para su conservación]]></article-title>
<source><![CDATA[Biodiversitas]]></source>
<year>2006</year>
<volume>68</volume>
<page-range>11-5</page-range></nlm-citation>
</ref>
<ref id="B7">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Bernier]]></surname>
<given-names><![CDATA[G]]></given-names>
</name>
<name>
<surname><![CDATA[Kinet]]></surname>
<given-names><![CDATA[J-M]]></given-names>
</name>
<name>
<surname><![CDATA[Sachs]]></surname>
<given-names><![CDATA[RM]]></given-names>
</name>
</person-group>
<source><![CDATA[The Physiology of Flowering]]></source>
<year>1981</year>
<publisher-loc><![CDATA[Boca Raton ]]></publisher-loc>
<publisher-name><![CDATA[CRC Press]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B8">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Bravo-Hollis]]></surname>
<given-names><![CDATA[H]]></given-names>
</name>
<name>
<surname><![CDATA[Sánchez-Mejorada]]></surname>
<given-names><![CDATA[H]]></given-names>
</name>
</person-group>
<source><![CDATA[Las cactáceas de México]]></source>
<year>1991</year>
<volume>ll</volume>
<publisher-loc><![CDATA[D.F. ]]></publisher-loc>
<publisher-name><![CDATA[Universidad Autónoma de México]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B9">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Brown]]></surname>
<given-names><![CDATA[AHD]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Genetic characterization of plant mating systems]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[Brown]]></surname>
<given-names><![CDATA[AHD]]></given-names>
</name>
<name>
<surname><![CDATA[Clegg]]></surname>
<given-names><![CDATA[MT]]></given-names>
</name>
<name>
<surname><![CDATA[Kahler]]></surname>
<given-names><![CDATA[AL]]></given-names>
</name>
<name>
<surname><![CDATA[Weir]]></surname>
<given-names><![CDATA[BS]]></given-names>
</name>
</person-group>
<source><![CDATA[Plant population genetics, breeding, and genetic resources]]></source>
<year>1990</year>
<publisher-loc><![CDATA[Sunderland ]]></publisher-loc>
<publisher-name><![CDATA[Sinauer Associates]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B10">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Camargo-Smidt]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
<name>
<surname><![CDATA[Silva-Pereira]]></surname>
<given-names><![CDATA[V]]></given-names>
</name>
<name>
<surname><![CDATA[Leite-Borba]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Reproductive biology of two Cattleya (Orchidaceae) species endemic to north-eastern Brazil]]></article-title>
<source><![CDATA[Plant Species Biology]]></source>
<year>2006</year>
<volume>21</volume>
<page-range>85-91</page-range></nlm-citation>
</ref>
<ref id="B11">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Carrillo-Angeles]]></surname>
<given-names><![CDATA[I]]></given-names>
</name>
<name>
<surname><![CDATA[Suzán-Azpiri]]></surname>
<given-names><![CDATA[H]]></given-names>
</name>
<name>
<surname><![CDATA[Mandujano]]></surname>
<given-names><![CDATA[MC]]></given-names>
</name>
<name>
<surname><![CDATA[Golubov]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Martínez-Ávalos]]></surname>
<given-names><![CDATA[JG]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Niche breadth and the implications of climate change in the conservation of the genus Astrophytum (Cactaceae)]]></article-title>
<source><![CDATA[Journal of Arid Environments]]></source>
<year>2016</year>
<volume>124</volume>
<page-range>310-7</page-range></nlm-citation>
</ref>
<ref id="B12">
<nlm-citation citation-type="book">
<collab>CONABIO</collab>
<source><![CDATA[Programa de Manejo Reserva de la Biosfera Barranca de Metztitlán, México]]></source>
<year>2003</year>
<publisher-loc><![CDATA[D.F ]]></publisher-loc>
<publisher-name><![CDATA[Comisión Natural de Áreas Naturales Protegidas]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B13">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Contreras]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
<name>
<surname><![CDATA[Valverde]]></surname>
<given-names><![CDATA[T]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Evaluation of the conservation status of a rare cactus (Mammillaria crucigera) through the analysis of its population dynamics]]></article-title>
<source><![CDATA[Journal of Arid Environments]]></source>
<year>2002</year>
<volume>51</volume>
<page-range>89-102</page-range></nlm-citation>
</ref>
<ref id="B14">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Cruden]]></surname>
<given-names><![CDATA[RW]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Pollen-ovule ratios: a conservative indicator of breeding systems in flowering plants]]></article-title>
<source><![CDATA[Evolution]]></source>
<year>1977</year>
<volume>31</volume>
<page-range>32-46</page-range></nlm-citation>
</ref>
<ref id="B15">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Dafni]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
</person-group>
<source><![CDATA[Pollination Ecology. A Practical Approach]]></source>
<year>1992</year>
<publisher-loc><![CDATA[Oxford ]]></publisher-loc>
<publisher-name><![CDATA[Oxford University Press]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B16">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Del Castillo]]></surname>
<given-names><![CDATA[RF]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Fenología y remoción de semillas en Ferocactus histrix]]></article-title>
<source><![CDATA[Cactáceas y Suculentas Mexicanas]]></source>
<year>1988</year>
<volume>33</volume>
<page-range>5-14</page-range></nlm-citation>
</ref>
<ref id="B17">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Díaz-Segura]]></surname>
<given-names><![CDATA[O]]></given-names>
</name>
</person-group>
<source><![CDATA[Dinámica Poblacional de Lophophora diffusa &#8220;Peyote&#8221; (Cactaceae) en una localidad del estado de Querétaro]]></source>
<year>2013</year>
<publisher-name><![CDATA[Universidad Autónoma Metropolitana]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B18">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Diekmann]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Relationship between flowering phenology of perennial herbs and meteorological data in deciduous forests of Sweden]]></article-title>
<source><![CDATA[Canadian Journal of Botany]]></source>
<year>1996</year>
<volume>74</volume>
<page-range>528-37</page-range></nlm-citation>
</ref>
<ref id="B19">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Dupont]]></surname>
<given-names><![CDATA[YL]]></given-names>
</name>
<name>
<surname><![CDATA[Hansen]]></surname>
<given-names><![CDATA[BM]]></given-names>
</name>
<name>
<surname><![CDATA[Valido]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Olesen]]></surname>
<given-names><![CDATA[JM]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Impact of introduced honey bees on native pollination interactions of the endemic Echium wildpretii (Boraginaceae) on Tenerife, Canary Islands]]></article-title>
<source><![CDATA[Biological Conservation]]></source>
<year>2004</year>
<volume>118</volume>
<page-range>301-11</page-range></nlm-citation>
</ref>
<ref id="B20">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Esparza-Olguín]]></surname>
<given-names><![CDATA[L]]></given-names>
</name>
<name>
<surname><![CDATA[Valverde]]></surname>
<given-names><![CDATA[T]]></given-names>
</name>
<name>
<surname><![CDATA[Vilchis-Anaya]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Demographic analysis of a rare columnar cactus (Neobuxbaumia macrocephala) in the Tehuacan Valley, Mexico]]></article-title>
<source><![CDATA[Biological Conservation]]></source>
<year>2002</year>
<volume>103</volume>
<page-range>349-59</page-range></nlm-citation>
</ref>
<ref id="B21">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Esparza-Olguín]]></surname>
<given-names><![CDATA[L]]></given-names>
</name>
<name>
<surname><![CDATA[Valverde]]></surname>
<given-names><![CDATA[T]]></given-names>
</name>
<name>
<surname><![CDATA[Mandujano]]></surname>
<given-names><![CDATA[MC]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Comparative demographic analysis of three Neobuxbaumia species (Cactaceae) with differing degree of rarity]]></article-title>
<source><![CDATA[Population Ecology]]></source>
<year>2005</year>
<volume>47</volume>
<page-range>229-45</page-range></nlm-citation>
</ref>
<ref id="B22">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Evans]]></surname>
<given-names><![CDATA[LT]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Flower induction and the florigen concept]]></article-title>
<source><![CDATA[Annual Review of P1ant Physiology]]></source>
<year>1971</year>
<volume>22</volume>
<page-range>365-94</page-range></nlm-citation>
</ref>
<ref id="B23">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Fenner]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The phenology of growth and reproduction in plants]]></article-title>
<source><![CDATA[Perspectives in Plant Ecology, Evolution and Systematics]]></source>
<year>1998</year>
<volume>1</volume>
<page-range>78-91</page-range></nlm-citation>
</ref>
<ref id="B24">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[López-Flores]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
</person-group>
<source><![CDATA[Demografía de Astrophytum myriostigma Lem (Cactaceae)]]></source>
<year>2012</year>
<publisher-name><![CDATA[Universidad Nacional Autónoma de México]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B25">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Gentry]]></surname>
<given-names><![CDATA[AH]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Flowering phenology and diversity in tropical Bignoniaceae]]></article-title>
<source><![CDATA[Biotropica]]></source>
<year>1974</year>
<volume>6</volume>
<page-range>64-8</page-range></nlm-citation>
</ref>
<ref id="B26">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Flores-Martínez]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Manzanero]]></surname>
<given-names><![CDATA[MGI]]></given-names>
</name>
<name>
<surname><![CDATA[Golubov]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Mandujano]]></surname>
<given-names><![CDATA[MC]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Biología floral de Mammillaria huitzilopochtli, una especie rara que habita acantilados]]></article-title>
<source><![CDATA[Botanical Sciences]]></source>
<year>2013</year>
<volume>91</volume>
<page-range>349-56</page-range></nlm-citation>
</ref>
<ref id="B27">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Guzmán]]></surname>
<given-names><![CDATA[U]]></given-names>
</name>
<name>
<surname><![CDATA[Arias]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Dávila]]></surname>
<given-names><![CDATA[P]]></given-names>
</name>
</person-group>
<source><![CDATA[Catálogo de Cactáceas Mexicanas]]></source>
<year>2003</year>
<publisher-loc><![CDATA[D.F ]]></publisher-loc>
<publisher-name><![CDATA[Universidad Nacional Autónoma de México]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B28">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Hernández]]></surname>
<given-names><![CDATA[HM]]></given-names>
</name>
<name>
<surname><![CDATA[Gómez-Hinostrosa]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Areas of endemism of Cactaceae and the effectiveness of the protected area network in the Chihuahuan Desert]]></article-title>
<source><![CDATA[Oryx]]></source>
<year>2011</year>
<volume>45</volume>
<page-range>191-200</page-range></nlm-citation>
</ref>
<ref id="B29">
<nlm-citation citation-type="">
<collab>INIFAP Estación Tlatepexe Municipio Metztitlán Hidalgo</collab>
<source><![CDATA[]]></source>
<year></year>
</nlm-citation>
</ref>
<ref id="B30">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Jiménez-Sierra]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
<name>
<surname><![CDATA[Reyes]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Las Cactáceas de Metztitlán]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[Armella]]></surname>
<given-names><![CDATA[MA]]></given-names>
</name>
<name>
<surname><![CDATA[Yánez]]></surname>
<given-names><![CDATA[L]]></given-names>
</name>
<name>
<surname><![CDATA[Sandoval]]></surname>
<given-names><![CDATA[ME]]></given-names>
</name>
</person-group>
<source><![CDATA[Lugar de la luna y las maravillas]]></source>
<year>2000</year>
<publisher-loc><![CDATA[D.F. ]]></publisher-loc>
<publisher-name><![CDATA[Secretaria de Medio Ambiente, Recursos Naturales y Pesca]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B31">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Jiménez]]></surname>
<given-names><![CDATA[FA]]></given-names>
</name>
<name>
<surname><![CDATA[Jiménez-Sierra]]></surname>
<given-names><![CDATA[CL]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Uso y manejo de las cactáceas en la Reserva de la Biosfera Barranca de Metztitlán, Hidalgo, México]]></article-title>
<source><![CDATA[Sitientibus Série Biológicas]]></source>
<year>2007</year>
<volume>7</volume>
<page-range>78-85</page-range></nlm-citation>
</ref>
<ref id="B32">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Jiménez-Sierra]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
<name>
<surname><![CDATA[Mandujano]]></surname>
<given-names><![CDATA[MC]]></given-names>
</name>
<name>
<surname><![CDATA[Eguiarte]]></surname>
<given-names><![CDATA[LE]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Are populations of the candy barrel cactus (Echinocactus platyacanthus) in the desert of Tehuacán, Mexico at risk? Population projection matrix and life table response analysis]]></article-title>
<source><![CDATA[Biological Conservation]]></source>
<year>2007</year>
<volume>135</volume>
<page-range>278-92</page-range></nlm-citation>
</ref>
<ref id="B33">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Jiménez-Sierra]]></surname>
<given-names><![CDATA[CL]]></given-names>
</name>
</person-group>
<source><![CDATA[Estudios sobre la biología y demografía de Echinocactus platyacanthus Link &amp; Otto, en Zapotitlán de las Salinas, Puebla]]></source>
<year>2008</year>
<publisher-name><![CDATA[Universidad Nacional Autónoma de México]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B34">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Jiménez-Sierra]]></surname>
<given-names><![CDATA[CL]]></given-names>
</name>
<name>
<surname><![CDATA[Eguiarte]]></surname>
<given-names><![CDATA[LE]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Candy Barrel Cactus (Echinocactus platyacanthus Link y Otto): A Traditional Plant Resource in Mexico Subject to Uncontrolled Extraction and Browsing]]></article-title>
<source><![CDATA[Economic Botany]]></source>
<year>2010</year>
<volume>64</volume>
<page-range>99-108</page-range></nlm-citation>
</ref>
<ref id="B35">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Jiménez-Sierra]]></surname>
<given-names><![CDATA[CL]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Las cactáceas mexicanas y los riesgos que enfrentan]]></article-title>
<source><![CDATA[Revista Digital Universitaria]]></source>
<year>2011</year>
<volume>12</volume>
<page-range>1067-6079</page-range></nlm-citation>
</ref>
<ref id="B36">
<nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Jiménez-Sierra]]></surname>
<given-names><![CDATA[CL]]></given-names>
</name>
<name>
<surname><![CDATA[Matías-Palafox]]></surname>
<given-names><![CDATA[ML]]></given-names>
</name>
</person-group>
<source><![CDATA[Dinámica poblacional de cactáceas amenazadas. Universidad Autónoma Metropolitana, Unidad Iztapalapa. Informe final SNIB-CONABIO proyecto No. HK026]]></source>
<year>2015</year>
</nlm-citation>
</ref>
<ref id="B37">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Mandujano]]></surname>
<given-names><![CDATA[MC]]></given-names>
</name>
<name>
<surname><![CDATA[Bravo]]></surname>
<given-names><![CDATA[Y]]></given-names>
</name>
<name>
<surname><![CDATA[Verhulst]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Carrillo-Ángeles]]></surname>
<given-names><![CDATA[I]]></given-names>
</name>
<name>
<surname><![CDATA[Golubov]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The population dynamics of an endemic collectible cactus]]></article-title>
<source><![CDATA[Acta Oecologica]]></source>
<year>2015</year>
<volume>63</volume>
<page-range>1-7</page-range></nlm-citation>
</ref>
<ref id="B38">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Mandujano]]></surname>
<given-names><![CDATA[MC]]></given-names>
</name>
<name>
<surname><![CDATA[Carrillo-Ángeles]]></surname>
<given-names><![CDATA[I]]></given-names>
</name>
<name>
<surname><![CDATA[Martínez-Peralta]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
<name>
<surname><![CDATA[Golubov]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Reproductive biology of Cactaceae]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[Ramawat]]></surname>
<given-names><![CDATA[KG]]></given-names>
</name>
</person-group>
<source><![CDATA[Desert Plants: Biology and Biotechnology]]></source>
<year>2010</year>
<page-range>197-230</page-range><publisher-loc><![CDATA[Berlin ]]></publisher-loc>
<publisher-name><![CDATA[Springer-Verlag]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B39">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Martínez-Mendoza]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
<name>
<surname><![CDATA[López-Rodríguez]]></surname>
<given-names><![CDATA[FM]]></given-names>
</name>
<name>
<surname><![CDATA[Flores-Martínez]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Manzanero-Medina]]></surname>
<given-names><![CDATA[GI]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Evaluación de técnicas de propagación de Mammillaria oteroi Glass &amp; R.Foster]]></article-title>
<source><![CDATA[Naturaleza y Desarrollo]]></source>
<year>2004</year>
<volume>2</volume>
<page-range>5-12</page-range></nlm-citation>
</ref>
<ref id="B40">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Martínez-Ávalos]]></surname>
<given-names><![CDATA[JG]]></given-names>
</name>
</person-group>
<source><![CDATA[Estudio demográfico del &#8220;star cactus&#8221; Astrophytum asterias (Lem.) Zucc. (Cactaceae) una especie en riesgo de extinción]]></source>
<year>2007</year>
<publisher-loc><![CDATA[México ]]></publisher-loc>
<publisher-name><![CDATA[Universidad Autónoma de Nuevo León]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B41">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Martínez-Ávalos]]></surname>
<given-names><![CDATA[JG]]></given-names>
</name>
<name>
<surname><![CDATA[Golubov]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Mandujano]]></surname>
<given-names><![CDATA[MC]]></given-names>
</name>
<name>
<surname><![CDATA[Jurado]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Causes of individual mortality in the endangered star cactus Astrophytum asterias (Cactaceae): The effect of herbivores and disease in Mexican populations]]></article-title>
<source><![CDATA[Journal of Arid Environments]]></source>
<year>2007</year>
<volume>71</volume>
<page-range>250-8</page-range></nlm-citation>
</ref>
<ref id="B42">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Martínez-Peralta]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
<name>
<surname><![CDATA[Mandujano]]></surname>
<given-names><![CDATA[MC]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Reproductive ecology of the endangered living rock cactus, Ariocarpus fissuratus (Cactaceae)]]></article-title>
<source><![CDATA[The Journal of the Torrey Botanical Society]]></source>
<year>2011</year>
<volume>138</volume>
<page-range>145-55</page-range></nlm-citation>
</ref>
<ref id="B43">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Martorell]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
<name>
<surname><![CDATA[Peters]]></surname>
<given-names><![CDATA[EM]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The measurement of chronic disturbance and its effects on the threatened cactus Mammillaria pectinifera]]></article-title>
<source><![CDATA[Biological Conservation]]></source>
<year>2005</year>
<volume>2</volume>
<page-range>199-207</page-range></nlm-citation>
</ref>
<ref id="B44">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Martorell]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
<name>
<surname><![CDATA[Montañana]]></surname>
<given-names><![CDATA[DM]]></given-names>
</name>
<name>
<surname><![CDATA[Ureta]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
<name>
<surname><![CDATA[Mandujano]]></surname>
<given-names><![CDATA[MC]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Assessing the importance of multiple threats to an endangered globose cactus in Mexico: Cattle grazing, looting and climate change]]></article-title>
<source><![CDATA[Biological Conservation]]></source>
<year>2015</year>
<volume>181</volume>
<page-range>73-81</page-range></nlm-citation>
</ref>
<ref id="B45">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Matias-Palafox]]></surname>
<given-names><![CDATA[ML]]></given-names>
</name>
</person-group>
<source><![CDATA[Estructura poblacional y biología reproductiva de Turbinicarpus horripilus (Lem.) Vác. John y Riha (Cactaceae)]]></source>
<year>2007</year>
<publisher-name><![CDATA[Universidad Autónoma Metropolitana]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B46">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Matias-Palafox]]></surname>
<given-names><![CDATA[ML]]></given-names>
</name>
<name>
<surname><![CDATA[Rocha]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Los cactus: Un elemento estructural de los ambientes áridos de México]]></article-title>
<source><![CDATA[Extensión al campo]]></source>
<year>2013</year>
<volume>27</volume>
<page-range>4-7</page-range></nlm-citation>
</ref>
<ref id="B47">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Navarro]]></surname>
<given-names><![CDATA[CMC]]></given-names>
</name>
<name>
<surname><![CDATA[Flores]]></surname>
<given-names><![CDATA[MA]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Aspectos demográficos de Echinocereus pulchellus var. pulchellus en el municipio de Chignahuapan, Puebla]]></article-title>
<source><![CDATA[Cactáceas y Suculentas Mexicanas]]></source>
<year>2002</year>
<volume>47</volume>
<page-range>24-32</page-range></nlm-citation>
</ref>
<ref id="B48">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Nassar]]></surname>
<given-names><![CDATA[JM]]></given-names>
</name>
<name>
<surname><![CDATA[Ramírez]]></surname>
<given-names><![CDATA[N]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Reproductive biology of the melon cactus, Melocactus curvispinus (Cactaceae)]]></article-title>
<source><![CDATA[Plant Systematics and Evolution]]></source>
<year>2004</year>
<volume>248</volume>
<page-range>31-44</page-range></nlm-citation>
</ref>
<ref id="B49">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Neal]]></surname>
<given-names><![CDATA[PR]]></given-names>
</name>
<name>
<surname><![CDATA[Anderson]]></surname>
<given-names><![CDATA[GJ]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Are &#8220; mating systems&#8221; &#8220;breeding systems&#8221; of inconsistent and confusing terminology in plant reproductive biology? Or is it the other way around?]]></article-title>
<source><![CDATA[Plant Systematics and Evolution]]></source>
<year>2005</year>
<volume>250</volume>
<page-range>173-85</page-range></nlm-citation>
</ref>
<ref id="B50">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Parmesan]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
<name>
<surname><![CDATA[Yohe]]></surname>
<given-names><![CDATA[G]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[A globally coherent fingerprint of climate change impacts across natural systems]]></article-title>
<source><![CDATA[Nature]]></source>
<year>2003</year>
<volume>421</volume>
<page-range>37-42</page-range></nlm-citation>
</ref>
<ref id="B51">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Rathcke]]></surname>
<given-names><![CDATA[B]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Competition and facilitation among plants for pollination]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[Real]]></surname>
<given-names><![CDATA[L]]></given-names>
</name>
</person-group>
<source><![CDATA[Pollination Biology]]></source>
<year>1983</year>
<page-range>305-29</page-range><publisher-loc><![CDATA[Orlando ]]></publisher-loc>
<publisher-name><![CDATA[Academic Press]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B52">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Reyes]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Arias]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Cactáceas de México: Conservación y Producción]]></article-title>
<source><![CDATA[Revista Chapingo. Horticultura]]></source>
<year>1995</year>
<volume>3</volume>
<page-range>85-92</page-range></nlm-citation>
</ref>
<ref id="B53">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Richards]]></surname>
<given-names><![CDATA[AJ]]></given-names>
</name>
</person-group>
<source><![CDATA[Plant breeding systems]]></source>
<year>1997</year>
<publisher-loc><![CDATA[London ]]></publisher-loc>
<publisher-name><![CDATA[Chapman &amp; Hall]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B54">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Rosenzweig]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
<name>
<surname><![CDATA[Karoly]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
<name>
<surname><![CDATA[Vicarelli]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Neofotis]]></surname>
<given-names><![CDATA[P]]></given-names>
</name>
<name>
<surname><![CDATA[Wu]]></surname>
<given-names><![CDATA[Q]]></given-names>
</name>
<name>
<surname><![CDATA[Casassa]]></surname>
<given-names><![CDATA[G]]></given-names>
</name>
<name>
<surname><![CDATA[Menzel]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Root]]></surname>
<given-names><![CDATA[TL]]></given-names>
</name>
<name>
<surname><![CDATA[Estrella]]></surname>
<given-names><![CDATA[N]]></given-names>
</name>
<name>
<surname><![CDATA[Seguin]]></surname>
<given-names><![CDATA[B]]></given-names>
</name>
<name>
<surname><![CDATA[Tryjanowski]]></surname>
<given-names><![CDATA[P]]></given-names>
</name>
<name>
<surname><![CDATA[Liu]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
<name>
<surname><![CDATA[Rawlins]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Imeson]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Attributing physical and biological impacts to anthropogenic climate change]]></article-title>
<source><![CDATA[Nature]]></source>
<year>2008</year>
<volume>453</volume>
<page-range>353-7</page-range></nlm-citation>
</ref>
<ref id="B55">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ruiz]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Santos]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Cavelier]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Soriano]]></surname>
<given-names><![CDATA[PJ]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Estudio fenológico de Cactáceas en el Enclave Seco de la Tatacoa, Colombia]]></article-title>
<source><![CDATA[Biotropica]]></source>
<year>2000</year>
<volume>32</volume>
<page-range>397-407</page-range></nlm-citation>
</ref>
<ref id="B56">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Sánchez-Mejorada]]></surname>
<given-names><![CDATA[H]]></given-names>
</name>
</person-group>
<source><![CDATA[Manual de campo de las Cactáceas y Suculentas de la Barranca de Metztitlán]]></source>
<year>1978</year>
<publisher-loc><![CDATA[D.F. ]]></publisher-loc>
<publisher-name><![CDATA[Sociedad Mexicana de Cactología]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B57">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Saunders]]></surname>
<given-names><![CDATA[NE]]></given-names>
</name>
<name>
<surname><![CDATA[Sipes]]></surname>
<given-names><![CDATA[SD]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Reproductive biology and pollination ecology of the rare Yellowstone Park endemic Abronia ammophila (Nyctaginaceae)]]></article-title>
<source><![CDATA[Plant Species Biology]]></source>
<year>2006</year>
<volume>21</volume>
<page-range>75-84</page-range></nlm-citation>
</ref>
<ref id="B58">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Scobell]]></surname>
<given-names><![CDATA[SA]]></given-names>
</name>
<name>
<surname><![CDATA[Scott]]></surname>
<given-names><![CDATA[PE]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Visitors and floral traits of a Hummingbird-adapted Cactus (Echinocereus coccineus) Show Only Minor Variation Along an Elevational Gradient]]></article-title>
<source><![CDATA[The American Midland Naturalist]]></source>
<year>2002</year>
<volume>147</volume>
<page-range>1-15</page-range></nlm-citation>
</ref>
<ref id="B59">
<nlm-citation citation-type="journal">
<collab>SEMARNAT (Secretaría del Medio Ambiente y Recursos Naturales)</collab>
<article-title xml:lang=""><![CDATA[NORMA Oficial Mexicana NOM-059-SEMARNAT-2010, Protección ambiental-Especies nativas de México de flora y fauna silvestres-Categorías de riesgo y especificaciones para su inclusión, exclusión o cambio-Lista de especies en riesgo]]></article-title>
<source><![CDATA[Diario Oficial de la Federación]]></source>
<year>2010</year>
</nlm-citation>
</ref>
<ref id="B60">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Strong]]></surname>
<given-names><![CDATA[AW]]></given-names>
</name>
<name>
<surname><![CDATA[Williamson]]></surname>
<given-names><![CDATA[PS]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Breeding system of Astrophytum asterias: an endangered cactus]]></article-title>
<source><![CDATA[The Southwestern Naturalist]]></source>
<year>2007</year>
<volume>52</volume>
<page-range>341-6</page-range></nlm-citation>
</ref>
<ref id="B61">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Valverde]]></surname>
<given-names><![CDATA[PL]]></given-names>
</name>
<name>
<surname><![CDATA[Zavala]]></surname>
<given-names><![CDATA[JA]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Assessing the ecological status of Mammillaria pectinifera Weber (Cactaceae), a rare and threatened species endemic of the Tehuacán-Cuicatlán Region in Central Mexico]]></article-title>
<source><![CDATA[Journal of Arid Environments]]></source>
<year>2006</year>
<volume>64</volume>
<page-range>193-208</page-range></nlm-citation>
</ref>
<ref id="B62">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Valverde]]></surname>
<given-names><![CDATA[PL]]></given-names>
</name>
<name>
<surname><![CDATA[Jiménez-Sierra]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
<name>
<surname><![CDATA[López-Ortega]]></surname>
<given-names><![CDATA[G]]></given-names>
</name>
<name>
<surname><![CDATA[Zavala-Hurtado]]></surname>
<given-names><![CDATA[JA]]></given-names>
</name>
<name>
<surname><![CDATA[Rivas-Arancibia]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Rendón-Aguilar]]></surname>
<given-names><![CDATA[B]]></given-names>
</name>
<name>
<surname><![CDATA[Pérez-Hernández]]></surname>
<given-names><![CDATA[MA]]></given-names>
</name>
<name>
<surname><![CDATA[Cornejo-Romero]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Carrillo-Ruíz]]></surname>
<given-names><![CDATA[H]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Floral morphometry, anthesis, and pollination success of Mammillaria pectinifera (Cactaceae), a rare and threatened endemic species of Central Mexico]]></article-title>
<source><![CDATA[Journal of Arid Environments]]></source>
<year>2015</year>
<volume>116</volume>
<page-range>29-32</page-range></nlm-citation>
</ref>
<ref id="B63">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Valiente-Banuet]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Rojas-Martínez]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Casas]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Del Coro Arizmendi]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Dávila]]></surname>
<given-names><![CDATA[P]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Pollination biology of two winter-blooming giant columnar cacti in the Tehuacán Valley, Central Mexico]]></article-title>
<source><![CDATA[Journal of Arid Environments]]></source>
<year>1997</year>
<volume>372</volume>
<page-range>331-41</page-range></nlm-citation>
</ref>
<ref id="B64">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Vázquez-Lobo]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Aguilar]]></surname>
<given-names><![CDATA[G]]></given-names>
</name>
<name>
<surname><![CDATA[Arias]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Golubov]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Hernández-Hernández]]></surname>
<given-names><![CDATA[T]]></given-names>
</name>
<name>
<surname><![CDATA[Mandujano]]></surname>
<given-names><![CDATA[MC]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Phylogeny and biogeographic history of Astrophytum (Cactaceae)]]></article-title>
<source><![CDATA[Systematic Botany]]></source>
<year>2016</year>
<volume>40</volume>
<page-range>1022-30</page-range></nlm-citation>
</ref>
<ref id="B65">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Waser]]></surname>
<given-names><![CDATA[NM]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Interespecific Pollen Transfer and Competition between Co-Occurring Plant Species]]></article-title>
<source><![CDATA[Oecologia]]></source>
<year>1978</year>
<volume>36</volume>
<page-range>223-36</page-range></nlm-citation>
</ref>
<ref id="B66">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Waser]]></surname>
<given-names><![CDATA[NM]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Flower Constancy: definition, cause, and measurement]]></article-title>
<source><![CDATA[The American Naturalist]]></source>
<year>1986</year>
<volume>127</volume>
<page-range>593-603</page-range></nlm-citation>
</ref>
<ref id="B67">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Waser]]></surname>
<given-names><![CDATA[NM]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Sex, mating systems, inbreeding, and outbreeding]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[Wilmsen]]></surname>
<given-names><![CDATA[TN]]></given-names>
</name>
</person-group>
<source><![CDATA[The natural history of inbreeding and outbreeding: Theoretical and empirical perspectives]]></source>
<year>1993</year>
<publisher-loc><![CDATA[Chicago ]]></publisher-loc>
<publisher-name><![CDATA[The University of Chicago Press]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B68">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Wyatt]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Pollinator&#8211;plant interactions and the evolution of breeding systems]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[Real]]></surname>
<given-names><![CDATA[L]]></given-names>
</name>
</person-group>
<source><![CDATA[Pollination Biology]]></source>
<year>1983</year>
<publisher-loc><![CDATA[Orlando ]]></publisher-loc>
<publisher-name><![CDATA[Academic Press]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B69">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Zepeda-Martínez]]></surname>
<given-names><![CDATA[V]]></given-names>
</name>
<name>
<surname><![CDATA[Mandujano]]></surname>
<given-names><![CDATA[MC]]></given-names>
</name>
<name>
<surname><![CDATA[Mandujano]]></surname>
<given-names><![CDATA[FJ]]></given-names>
</name>
<name>
<surname><![CDATA[Golubov]]></surname>
<given-names><![CDATA[JK]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[What can the demography of Astrophytum ornatum tell us of its endangered status?]]></article-title>
<source><![CDATA[Journal of Arid Environments]]></source>
<year>2013</year>
<volume>88</volume>
<page-range>244-9</page-range></nlm-citation>
</ref>
</ref-list>
</back>
</article>
