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<document ID-DOI="http://dx.doi.org/10.3897/phytokeys.15.3084" ID-PMC="PMC3492929" ID-Pensoft-Pub="1314-2003-15-1" ID-Pensoft-UUID="FF9AC356FFDAFB26FF95FFE3FFA1520C" ID-PubMed="23185125" ID-Zenodo-Dep="576134" ModsDocID="1314-2003-15-1" checkinTime="1451251993896" checkinUser="pensoft" docAuthor="Soreng, Robert J. &amp; Peterson, Paul M." docDate="2012" docId="AC88CA034ED05EA3A7B4B54D8DF1B293" docLanguage="en" docName="PhytoKeys 15: 1-104" docOrigin="PhytoKeys 15" docPubDate="2012-08-06" docSource="http://dx.doi.org/10.3897/phytokeys.15.3084" docTitle="Poa pratensis subsp. irrigata (Lindm.) H. Lindb., Sched. Pl. Findland. Exs. 2: 20. 1916." docType="treatment" docVersion="3" id="FF9AC356FFDAFB26FF95FFE3FFA1520C" lastPageNumber="48" masterDocId="FF9AC356FFDAFB26FF95FFE3FFA1520C" masterDocTitle="Revision of Poa L. (Poaceae, Pooideae, Poeae, Poinae) in Mexico: new records, re-evaluation of P. ruprechtii, and two new species, P. palmeri and P. wendtii" masterLastPageNumber="104" masterPageNumber="1" pageNumber="48" updateTime="1668139833991" updateUser="ExternalLinkService">
<mods:mods xmlns:mods="http://www.loc.gov/mods/v3">
<mods:titleInfo>
<mods:title>Revision of Poa L. (Poaceae, Pooideae, Poeae, Poinae) in Mexico: new records, re-evaluation of P. ruprechtii, and two new species, P. palmeri and P. wendtii</mods:title>
</mods:titleInfo>
<mods:name type="personal">
<mods:role>
<mods:roleTerm>Author</mods:roleTerm>
</mods:role>
<mods:namePart>Soreng, Robert J.</mods:namePart>
<mods:affiliation>Department of Botany, National Museum of Natural History, Smithsonian Institution Washington, DC, 20013 - 7012, USA</mods:affiliation>
</mods:name>
<mods:name type="personal">
<mods:role>
<mods:roleTerm>Author</mods:roleTerm>
</mods:role>
<mods:namePart>Peterson, Paul M.</mods:namePart>
<mods:affiliation>Department of Botany, National Museum of Natural History, Smithsonian Institution Washington, DC, 20013 - 7012, USA</mods:affiliation>
</mods:name>
<mods:typeOfResource>text</mods:typeOfResource>
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<mods:titleInfo>
<mods:title>PhytoKeys</mods:title>
</mods:titleInfo>
<mods:part>
<mods:date>2012</mods:date>
<mods:detail type="pubDate">
<mods:number>2012-08-06</mods:number>
</mods:detail>
<mods:detail type="volume">
<mods:number>15</mods:number>
</mods:detail>
<mods:extent unit="page">
<mods:start>1</mods:start>
<mods:end>104</mods:end>
</mods:extent>
</mods:part>
</mods:relatedItem>
<mods:location>
<mods:url>http://dx.doi.org/10.3897/phytokeys.15.3084</mods:url>
</mods:location>
<mods:classification>journal article</mods:classification>
<mods:identifier type="DOI">http://dx.doi.org/10.3897/phytokeys.15.3084</mods:identifier>
<mods:identifier type="Pensoft-Pub">1314-2003-15-1</mods:identifier>
<mods:identifier type="Pensoft-UUID">FF9AC356FFDAFB26FF95FFE3FFA1520C</mods:identifier>
<mods:identifier type="Zenodo-Dep">576134</mods:identifier>
</mods:mods>
<treatment ID-GBIF-Taxon="182229281" LSID="urn:lsid:plazi:treatment:AC88CA034ED05EA3A7B4B54D8DF1B293" httpUri="http://treatment.plazi.org/id/AC88CA034ED05EA3A7B4B54D8DF1B293" lastPageId="48" lastPageNumber="48" pageId="47" pageNumber="48">
<subSubSection pageId="47" pageNumber="48" type="nomenclature">
<paragraph pageId="47" pageNumber="48">
16d.
<taxonomicName LSID="AC88CA03-4ED0-5EA3-A7B4-B54D8DF1B293" authority="(Lindm.) H. Lindb., Sched. Pl. Findland. Exs. 2: 20. 1916." authorityName="(Lindm.) H. Lindb., Sched. Pl. Findland. Exs. 2: 20. 1916." class="Liliopsida" family="Poaceae" genus="Poa" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="Poa pratensis subsp. irrigata" order="Poales" pageId="47" pageNumber="48" phylum="Tracheophyta" rank="subSpecies" species="pratensis" subSpecies="irrigata">Poa pratensis irrigata (Lindm.) H. Lindb., Sched. Pl. Findland. Exs. 2: 20. 1916.</taxonomicName>
<figureCitation captionStart="Figure 18" captionStartId="F18" captionText="Figure 18. Poa pratensis L. A, B Poa pratensis subsp. irrigata (Lindm.) H. Lindb. A habit B spikelet C-J subsp. pratensis C habit D sheath, ligule blade lateral view E blade apex lateral view F blade apex adaxial view G inflorescence H branch segment with spikelets I spikelet J floret. Drawings from Soreng (2007)." httpUri="https://binary.pensoft.net/fig/10153" pageId="47" pageNumber="48">Fig. 18 A, B</figureCitation>
</paragraph>
</subSubSection>
<subSubSection pageId="47" pageNumber="48" type="reference_group">
<paragraph pageId="47" pageNumber="48">
<taxonomicName class="Liliopsida" family="Poaceae" genus="Poa" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="" order="Poales" pageId="47" pageNumber="48" phylum="Tracheophyta" rank="species" species="humilis">Poa humilis</taxonomicName>
Ehrh. ex Hoffm., Deutschland Flora 1: 45. 1800. Type: Sweden, Uppsala, Ehrhart 115 (isotypes: LE! plant B on sheet, plant A on sheet is
<taxonomicName authorityName="L., Sp. Pl. 1: 67 - 68" authorityYear="1753" class="Liliopsida" family="Poaceae" genus="Poa" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="" order="Poales" pageId="47" pageNumber="48" phylum="Tracheophyta" rank="species" species="pratensis">
<emphasis italics="true" pageId="47" pageNumber="48">Poa pratensis</emphasis>
</taxonomicName>
subsp.
<emphasis italics="true" pageId="47" pageNumber="48">alpigena</emphasis>
, LE! [2 sheets] plant B ex E. Fries Herb. Normal, LE-TRIN-2598.02! plant B ex E. Fries Herb. Normal).
</paragraph>
<paragraph pageId="47" pageNumber="48">
<taxonomicName class="Liliopsida" family="Poaceae" genus="Poa" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="" order="Poales" pageId="47" pageNumber="48" phylum="Tracheophyta" rank="species" species="bourgeaei">Poa bourgeaei</taxonomicName>
E. Fourn. Mexic. Pl. 2: 113 1886. Type: Mexico, Distrito Federal, pres San Angel, 23 May 1865,
<emphasis italics="true" pageId="47" pageNumber="48">E. Bourgeau 225</emphasis>
(isotype: US-89690! fragm.).
</paragraph>
</subSubSection>
<subSubSection pageId="47" pageNumber="48" type="description">
<paragraph pageId="47" pageNumber="48">Description.</paragraph>
<paragraph pageId="47" pageNumber="48">
Tufts sparse or dense to loose, sometimes forming turf, or some or all shoots solitary; dark green, or bluish-gray-green; tillers mainly extravaginal.
<emphasis bold="true" pageId="47" pageNumber="48">Culms</emphasis>
8-30(-50) cm tall. collar margins commonly retroresly strigulose.
<emphasis bold="true" pageId="47" pageNumber="48">Ligules</emphasis>
of lower culm and tiller leaves commonly pubescent abaxially; blades of cauline leaves flag leaf blades flat, thin, soft; sterile shoot blades usually less than 15 cm long, 2-4.5 mm wide, usually glabrous adaxially.
<emphasis bold="true" pageId="47" pageNumber="48">Panicles</emphasis>
2-10 cm long, open, broadly pyramidal; rachis with 1-3(-5) branches per node; primary branches widely spreading, smooth or sparsely to moderately scabrous; longest branches 1.5-6 cm, with 4-8 spikelets.
<emphasis bold="true" pageId="47" pageNumber="48">Spikelets</emphasis>
lanceolate to broadly lanceolate, not bulbiferous; glumes subequal, often glaucous; lower glumes (1-)3-veined; upper glumes usually subequaling the lowest lemma; lemmas 3-6(-6) mm long, finely muriculate, intermediate veins glabrous; paleas scabrous, medially glabrous over the keels, intercostal region glabrous. 2
<emphasis italics="true" pageId="47" pageNumber="48">n =</emphasis>
54, 56, 65, 80, 82-147.
</paragraph>
</subSubSection>
<subSubSection pageId="47" pageNumber="48" type="distribution">
<paragraph pageId="47" pageNumber="48">Distribution.</paragraph>
<paragraph pageId="47" pageNumber="48">The subspecies occurs in Eurasia, North America (Canada, Greenland, USA, and Mexico (Veracruz).</paragraph>
</subSubSection>
<subSubSection pageId="47" pageNumber="48" type="ecology">
<paragraph pageId="47" pageNumber="48">Ecology.</paragraph>
<paragraph pageId="47" pageNumber="48">The introduced subspecies iscultivated as a turf grass in mesic, cool temperate regions.</paragraph>
</subSubSection>
<subSubSection pageId="47" pageNumber="48" type="specimens examined">
<paragraph pageId="47" pageNumber="48">Specimens examined.</paragraph>
<paragraph pageId="47" pageNumber="48">
Mexico.
<emphasis bold="true" pageId="47" pageNumber="48">Veracruz:</emphasis>
Municipio Perote, Escobillo,
<geoCoordinate degrees="19" direction="north" minutes="31" orientation="latitude" precision="15" seconds="30" value="19.525">19°31'30&quot;N</geoCoordinate>
,
<geoCoordinate degrees="97" direction="west" minutes="13" orientation="longitude" precision="925" value="-97.21667">97°13'W</geoCoordinate>
, 3000 m, Mar 1991, H.R.Sandoval 78 (MEXU).
</paragraph>
</subSubSection>
<subSubSection lastPageId="48" lastPageNumber="49" pageId="47" pageNumber="48" type="discussion">
<paragraph pageId="47" pageNumber="48">Discussion.</paragraph>
<paragraph lastPageId="48" lastPageNumber="49" pageId="47" pageNumber="48">
The subspecies is often cultivated for pastures and lawns and many of the cultivars originate from Eurasian selections, or plants selected from foreign strains
<pageBreakToken pageId="48" pageNumber="49" start="start">established</pageBreakToken>
in North America; and cultivated strains are certainly present in Mexico (see type of
<taxonomicName class="Liliopsida" family="Poaceae" genus="Poa" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="" order="Poales" pageId="48" pageNumber="49" phylum="Tracheophyta" rank="species" species="bourgeaei">
<emphasis italics="true" pageId="48" pageNumber="49">Poa bourgeaei</emphasis>
</taxonomicName>
). Of more than 700 chromosome counts RJS has compiled from the literature for this taxon the vast majority are between 2
<emphasis italics="true" pageId="48" pageNumber="49">n =</emphasis>
80 and 147. Cultivated forms selected for lawns with soft flat leaves and loose tufts have generally been referred to
<taxonomicName authorityName="L., Sp. Pl. 1: 67 - 68" authorityYear="1753" class="Liliopsida" family="Poaceae" genus="Poa" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="" order="Poales" pageId="48" pageNumber="49" phylum="Tracheophyta" rank="species" species="pratensis">
<emphasis italics="true" pageId="48" pageNumber="49">Poa pratensis</emphasis>
</taxonomicName>
subsp.
<emphasis italics="true" pageId="48" pageNumber="49">irrigata</emphasis>
, which is considered Eurasian in origin. Some authors suggest
<taxonomicName authorityName="L., Sp. Pl. 1: 67 - 68" authorityYear="1753" class="Liliopsida" family="Poaceae" genus="Poa" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="" order="Poales" pageId="48" pageNumber="49" phylum="Tracheophyta" rank="species" species="pratensis">
<emphasis italics="true" pageId="48" pageNumber="49">Poa pratensis</emphasis>
</taxonomicName>
subsp.
<emphasis italics="true" pageId="48" pageNumber="49">latifolia</emphasis>
(Weihe ex Mert. &amp; W.D.J.Koch)
<normalizedToken originalValue="Schübl">Schuebl</normalizedToken>
. &amp; G.Martens is the same taxon and is the correct name (
<bibRefCitation author="Portal, R" journalOrPublisher="Sida" pageId="69" pageNumber="70" refId="B39" refString="Portal, R, 2005. Poa de France Belgique et Suisse. Privately published in France, 303 pp." title="Poa de France Belgique et Suisse. Privately published in France, 303 pp." year="2005">Portal 2005</bibRefCitation>
). At the species rank this subspecies has been called
<taxonomicName class="Liliopsida" family="Poaceae" genus="Poa" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="" order="Poales" pageId="48" pageNumber="49" phylum="Tracheophyta" rank="species" species="humilis">
<emphasis italics="true" pageId="48" pageNumber="49">Poa humilis</emphasis>
</taxonomicName>
Ehrh. ex Hoffm. and
<taxonomicName class="Liliopsida" family="Poaceae" genus="Poa" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="" order="Poales" pageId="48" pageNumber="49" phylum="Tracheophyta" rank="species" species="subcaerulea">
<emphasis italics="true" pageId="48" pageNumber="49">Poa subcaerulea</emphasis>
</taxonomicName>
Sm.
<taxonomicName authorityName="L., Sp. Pl. 1: 67 - 68" authorityYear="1753" class="Liliopsida" family="Poaceae" genus="Poa" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="" order="Poales" pageId="48" pageNumber="49" phylum="Tracheophyta" rank="species" species="pratensis">
<emphasis italics="true" pageId="48" pageNumber="49">Poa pratensis</emphasis>
</taxonomicName>
is possibly the
<normalizedToken originalValue="World">World'</normalizedToken>
s most complex species, fascinating in itself, but of which we know both much and too little.
</paragraph>
</subSubSection>
</treatment>
</document>