<?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>1409-3871</journal-id>
<journal-title><![CDATA[Lankesteriana]]></journal-title>
<abbrev-journal-title><![CDATA[Lankesteriana]]></abbrev-journal-title>
<issn>1409-3871</issn>
<publisher>
<publisher-name><![CDATA[Lankester Botanical Garden, University of Costa Rica]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1409-38712023000300585</article-id>
<article-id pub-id-type="doi">10.15517/lank.v23i3.58060</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[A new endemic species of Polystachya (Polystachyinae) from Eastern Tanzania]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Cribb]]></surname>
<given-names><![CDATA[Phillip J.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Hemp]]></surname>
<given-names><![CDATA[Andreas]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Royal Botanic Gardens The Herbarium ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>United Kingdom</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universitätsstr Dept. of Biology Institute of Plant Physiology]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Germany</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2023</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2023</year>
</pub-date>
<volume>23</volume>
<numero>3</numero>
<fpage>585</fpage>
<lpage>591</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_arttext&amp;pid=S1409-38712023000300585&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_abstract&amp;pid=S1409-38712023000300585&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_pdf&amp;pid=S1409-38712023000300585&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Polystachya nguruensis, a new endemic species from the isolated Nguru Mountains of eastern Tanzania, is described here, and its affinities and conservation status are discussed. Polystachya nguruensis differs from P. lukwangulensis in having much longer, more obviously several-noded pseudobulbs, shorter, narrowly oblong-elliptic, coriaceous leaves, and a longer, more densely many-flowered, branching inflorescence with smaller flowers and ecallose lip with a narrowly oblong a midlobe with a broadly obovate to subcircular, apiculate, lip midlobe. Unlike most allied species, it is a lithophyte, growing on sloping slabs of crystalline rock, a highly vulnerable habitat that has already been partly destroyed by fire. Consequently, it is assessed to be Critically Endangered and in need of immediate conservation attention.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[conservation suggestions]]></kwd>
<kwd lng="en"><![CDATA[Critically Endangered]]></kwd>
<kwd lng="en"><![CDATA[endemism]]></kwd>
<kwd lng="en"><![CDATA[new species]]></kwd>
<kwd lng="en"><![CDATA[Nguru Mountains]]></kwd>
<kwd lng="en"><![CDATA[Polystachya nguruensis]]></kwd>
<kwd lng="en"><![CDATA[threats]]></kwd>
<kwd lng="es"><![CDATA[amenazas]]></kwd>
<kwd lng="es"><![CDATA[endemismo]]></kwd>
<kwd lng="es"><![CDATA[Montañas Nguru]]></kwd>
<kwd lng="es"><![CDATA[nuevas especies]]></kwd>
<kwd lng="es"><![CDATA[peligro crítico]]></kwd>
<kwd lng="es"><![CDATA[Polystachya nguruensis]]></kwd>
<kwd lng="es"><![CDATA[sugerencias de conservación.]]></kwd>
</kwd-group>
</article-meta>
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