185 lines
15 KiB
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185 lines
15 KiB
XML
<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. & Peterson, Paul M." docDate="2012" docId="3D7AC3E16026531DA62970C933D2DDEA" 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. agassizensis (B. Boivin & D. Löve) Roy L. Taylor & MacBryde, Canad. J. Bot. 56 (2): 193. 1978." docType="treatment" docVersion="3" id="FF9AC356FFDAFB26FF95FFE3FFA1520C" lastPageNumber="46" 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="46" updateTime="1668139833991" updateUser="ExternalLinkService">
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<mods:mods xmlns:mods="http://www.loc.gov/mods/v3">
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<mods:titleInfo>
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<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>
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</mods:titleInfo>
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<mods:name type="personal">
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<mods:role>
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<mods:roleTerm>Author</mods:roleTerm>
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</mods:role>
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<mods:namePart>Soreng, Robert J.</mods:namePart>
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<mods:affiliation>Department of Botany, National Museum of Natural History, Smithsonian Institution Washington, DC, 20013 - 7012, USA</mods:affiliation>
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</mods:name>
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<mods:name type="personal">
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<mods:role>
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<mods:roleTerm>Author</mods:roleTerm>
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</mods:role>
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<mods:namePart>Peterson, Paul M.</mods:namePart>
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<mods:affiliation>Department of Botany, National Museum of Natural History, Smithsonian Institution Washington, DC, 20013 - 7012, USA</mods:affiliation>
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</mods:name>
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<mods:typeOfResource>text</mods:typeOfResource>
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<mods:relatedItem type="host">
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<mods:titleInfo>
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<mods:title>PhytoKeys</mods:title>
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</mods:titleInfo>
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<mods:part>
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<mods:date>2012</mods:date>
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<mods:detail type="pubDate">
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<mods:number>2012-08-06</mods:number>
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</mods:detail>
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<mods:detail type="volume">
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<mods:number>15</mods:number>
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</mods:detail>
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<mods:extent unit="page">
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<mods:start>1</mods:start>
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<mods:end>104</mods:end>
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</mods:extent>
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</mods:part>
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</mods:relatedItem>
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<mods:location>
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<mods:url>http://dx.doi.org/10.3897/phytokeys.15.3084</mods:url>
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</mods:location>
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<mods:classification>journal article</mods:classification>
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<mods:identifier type="DOI">http://dx.doi.org/10.3897/phytokeys.15.3084</mods:identifier>
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<mods:identifier type="Pensoft-Pub">1314-2003-15-1</mods:identifier>
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<mods:identifier type="Pensoft-UUID">FF9AC356FFDAFB26FF95FFE3FFA1520C</mods:identifier>
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<mods:identifier type="Zenodo-Dep">576134</mods:identifier>
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</mods:mods>
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<treatment ID-GBIF-Taxon="182229303" LSID="urn:lsid:plazi:treatment:3D7AC3E16026531DA62970C933D2DDEA" httpUri="http://treatment.plazi.org/id/3D7AC3E16026531DA62970C933D2DDEA" lastPageId="46" lastPageNumber="46" pageId="45" pageNumber="46">
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<subSubSection pageId="45" pageNumber="46" type="nomenclature">
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<paragraph pageId="45" pageNumber="46">
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16a.
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<taxonomicName LSID="3D7AC3E1-6026-531D-A629-70C933D2DDEA" authority="(B. Boivin & D. Loeve) Roy L. Taylor & MacBryde, Canad. J. Bot. 56 (2): 193. 1978." authorityName="(B. Boivin & D. Löve) Roy L. Taylor & MacBryde, Canad. J. Bot. 56 (2): 193. 1978." class="Liliopsida" family="Poaceae" genus="Poa" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="Poa pratensis subsp. agassizensis" order="Poales" pageId="45" pageNumber="46" phylum="Tracheophyta" rank="subSpecies" species="pratensis" subSpecies="agassizensis">
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Poa pratensis agassizensis (B. Boivin & D.
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<normalizedToken originalValue="Löve">Loeve</normalizedToken>
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) Roy L. Taylor & MacBryde, Canad. J. Bot. 56(2): 193. 1978.
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</taxonomicName>
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<figureCitation captionStart="Figure 17" captionStartId="F17" captionText="Figure 17. Poa pratensis L. A-C Poa pratensis subsp. agassizensis (B. Boivin & D. Loeve) Roy L. Taylor & MacBryde A habit B sheath, ligule, blade lateral view C branch segment with spikelets D-G subsp. alpigena (Lindm.) Hiitonen D habit E inflorescence F branch segment with spikelets G palea H, I subsp. angustifolia (L.) Lej. H habit I branch segment with spikelets. Drawings from Soreng (2007)." httpUri="https://binary.pensoft.net/fig/10152" pageId="45" pageNumber="46">Fig. 17 A-C</figureCitation>
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</paragraph>
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</subSubSection>
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<subSubSection pageId="45" pageNumber="46" type="reference_group">
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<paragraph pageId="45" pageNumber="46">
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<taxonomicName class="Liliopsida" family="Poaceae" genus="Poa" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="" order="Poales" pageId="45" pageNumber="46" phylum="Tracheophyta" rank="species" species="agassizensis">Poa agassizensis</taxonomicName>
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B. Boivin & D.
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<normalizedToken originalValue="Löve">Loeve</normalizedToken>
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, Naturaliste Canad. 87(6-7): 176-180, f. 1-2. 1960. Type: Canada, Manitoba, MacDonald Co, 6 Jun 1952,
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<emphasis italics="true" pageId="45" pageNumber="46">
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B.Boivin,
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<normalizedToken originalValue="Löve">Loeve</normalizedToken>
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& Alex 9167
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</emphasis>
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(holotype DAO!; isotype: US-2553819!).
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</paragraph>
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</subSubSection>
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<subSubSection pageId="45" pageNumber="46" type="description">
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<paragraph pageId="45" pageNumber="46">Description.</paragraph>
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<paragraph pageId="45" pageNumber="46">
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Tufts sparse, some shoots clustered; pale green or bluish-gray-green; tillers intra- and extravaginal.
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<emphasis bold="true" pageId="45" pageNumber="46">Culms</emphasis>
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20-40(-50) cm tall.
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<emphasis bold="true" pageId="45" pageNumber="46">Ligules</emphasis>
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of lower culm and tiller leaves commonly glabrous abaxially; lades of cauline leaves flag leaf blades folded, with involute margins, moderately thick, moderately firm; sterile shoot blades usually less than 10 cm long, 0.8-2 mm wide, all folded with involute margins, sparsely pubescent adaxially.
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<emphasis bold="true" pageId="45" pageNumber="46">Panicles</emphasis>
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4-6(-8) cm long, erect or nodding, or loosely contracted or open, ovoid to narrowly pyramidal; rachis with 2-3(-5) branches per node; primary branches steeply ascending to ascending, smooth or sparsely to moderately densely scabrous; longest 1-2.5(-3) cm, with several spikelets per branch.
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<emphasis bold="true" pageId="45" pageNumber="46">Spikelets</emphasis>
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lanceolate, not bulbiferous; glumes unequal, glaucous or not; lower glumes 1(-3)-veined; upper glumes shorter than or nearly subequaling the lowest lemma; lemmas 2-3(-3.5) mm long, finely muriculate, intermediate veins glabrous; paleas scabrous, medially glabrous over the keels, intercostal region glabrous.
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<emphasis bold="true" pageId="45" pageNumber="46">Anthers</emphasis>
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frequently sterile. 2
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<emphasis italics="true" pageId="45" pageNumber="46">n</emphasis>
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= 41, 42, 43, 56.
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</paragraph>
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</subSubSection>
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<subSubSection pageId="45" pageNumber="46" type="distribution">
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<paragraph pageId="45" pageNumber="46">Distribution.</paragraph>
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<paragraph pageId="45" pageNumber="46">This subspecies in North America is known from Canada and USA, and in Mexico from the states of Baja California and Coahuila.</paragraph>
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</subSubSection>
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<subSubSection pageId="45" pageNumber="46" type="ecology">
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<paragraph pageId="45" pageNumber="46">Ecology.</paragraph>
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<paragraph pageId="45" pageNumber="46">The subspecies inhabits cool temperate prairies, meadows, and open coniferous forests.</paragraph>
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</subSubSection>
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<subSubSection pageId="45" pageNumber="46" type="specimens examined">
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<paragraph pageId="45" pageNumber="46">Specimens examined.</paragraph>
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<paragraph pageId="45" pageNumber="46">
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Mexico.
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<emphasis bold="true" pageId="45" pageNumber="46">Baja California:</emphasis>
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Municipio Ensenada, Paraje El Rayo Ejido, 1000 m, 13 May 1997, A.Miranda 1153 (MEXU). Sierra San Pedro
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<normalizedToken originalValue="Mártir">Martir</normalizedToken>
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, La Gurulla,
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<geoCoordinate degrees="30" direction="north" minutes="54" orientation="latitude" precision="925" value="30.9">30°54'N</geoCoordinate>
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,
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<geoCoordinate degrees="115" direction="west" minutes="29" orientation="longitude" precision="925" value="-115.48333">115°29'W</geoCoordinate>
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, 2050 m, 29 Jun 1982, R.Moran 30956 (MEXU, TAES).
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<emphasis bold="true" pageId="45" pageNumber="46">Coahuila:</emphasis>
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Sierra de Arteaga, Las Vigas, Canon de la Carbonera,
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<geoCoordinate degrees="25" direction="north" minutes="20" orientation="latitude" precision="925" value="25.333334">25°20'N</geoCoordinate>
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,
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<geoCoordinate degrees="100" direction="west" minutes="39" orientation="longitude" precision="925" value="-100.65">100°39'W</geoCoordinate>
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, 2100 m, 5 Jun 1987, J.A.Villarreal 3800 & M.A.Carranza (TAES). Municipio Arteaga, Ejido La Escondida,
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<geoCoordinate degrees="25" direction="north" minutes="23" orientation="latitude" precision="15" seconds="30" value="25.391666">25°23'30"N</geoCoordinate>
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,
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<geoCoordinate degrees="100" direction="west" minutes="33" orientation="longitude" precision="15" seconds="15" value="-100.55417">100°33'15"W</geoCoordinate>
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, J.A.Garcia 49 (MEXU).
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</paragraph>
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</subSubSection>
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<subSubSection lastPageId="46" lastPageNumber="47" pageId="45" pageNumber="46" type="discussion">
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<paragraph pageId="45" pageNumber="46">Discussion.</paragraph>
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<paragraph lastPageId="46" lastPageNumber="47" pageId="45" pageNumber="46">
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This form of
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<taxonomicName authorityName="L., Sp. Pl. 1: 67 - 68" authorityYear="1753" class="Liliopsida" family="Poaceae" genus="Poa" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="" order="Poales" pageId="45" pageNumber="46" phylum="Tracheophyta" rank="species" species="pratensis">
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<emphasis italics="true" pageId="45" pageNumber="46">Poa pratensis</emphasis>
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</taxonomicName>
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, originally described as a species indigenous to Canada and the United States (Boivin and
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<normalizedToken originalValue="Löve">Loeve</normalizedToken>
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1960) and now accepted as
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<taxonomicName authorityName="L., Sp. Pl. 1: 67 - 68" authorityYear="1753" class="Liliopsida" family="Poaceae" genus="Poa" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="" order="Poales" pageId="45" pageNumber="46" phylum="Tracheophyta" rank="species" species="pratensis">
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<emphasis italics="true" pageId="45" pageNumber="46">Poa pratensis</emphasis>
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</taxonomicName>
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subsp.
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<emphasis italics="true" pageId="45" pageNumber="46">agassizensis</emphasis>
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, is probably indigenous, but morphologically is questionably distinct from the Eurasian elements of
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<taxonomicName authorityName="L., Sp. Pl. 1: 67 - 68" authorityYear="1753" class="Liliopsida" family="Poaceae" genus="Poa" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="" order="Poales" pageId="45" pageNumber="46" phylum="Tracheophyta" rank="species" species="pratensis">
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<emphasis italics="true" pageId="45" pageNumber="46">Poa pratensis</emphasis>
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</taxonomicName>
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subsp.
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<emphasis italics="true" pageId="45" pageNumber="46">angustifolia</emphasis>
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, or xeric forms of cultivated
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<taxonomicName authorityName="L., Sp. Pl. 1: 67 - 68" authorityYear="1753" class="Liliopsida" family="Poaceae" genus="Poa" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="" order="Poales" pageId="45" pageNumber="46" phylum="Tracheophyta" rank="species" species="pratensis">
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<emphasis italics="true" pageId="45" pageNumber="46">Poa pratensis</emphasis>
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</taxonomicName>
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subsp.
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<emphasis italics="true" pageId="45" pageNumber="46">pratensis</emphasis>
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(
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<bibRefCitation author="Soreng, RJ" journalOrPublisher="Madrono" pageId="69" pageNumber="70" refId="B50" refString="Soreng, RJ, 2007. Poa L. In: Barkworth ME, Capels KM, Long S, Piep MB (Eds) Magnoliophyta: Commelinidae (in part): Poaceae, part 1. Flora of North America North of Mexico, vol. 24. Oxford University Press, New York, 486-601." title="Poa L. In: Barkworth ME, Capels KM, Long S, Piep MB (Eds) Magnoliophyta: Commelinidae (in part): Poaceae, part 1. Flora of North America North of Mexico, vol. 24. Oxford University Press, New York, 486 - 601." year="2007">Soreng 2007</bibRefCitation>
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). As originally described it is a taxon with short, ovoid panicles, with small spikelets, and involute leaves. Such specimens are not uncommon among early herbarium collections across Canada and the USA. It approaches
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<taxonomicName authorityName="L., Sp. Pl. 1: 67 - 68" authorityYear="1753" class="Liliopsida" family="Poaceae" genus="Poa" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="" order="Poales" pageId="45" pageNumber="46" phylum="Tracheophyta" rank="species" species="pratensis">
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<emphasis italics="true" pageId="45" pageNumber="46">Poa pratensis</emphasis>
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</taxonomicName>
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subsp.
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<emphasis italics="true" pageId="45" pageNumber="46">angustifolia</emphasis>
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closely, but that subspecies of Eurasian origin has looser panicles, and is generally a lower polyploid (
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<bibRefCitation author="Stoneberg-Holt, SD" journalOrPublisher="Madrono" pageId="69" pageNumber="70" refId="B61" refString="Stoneberg-Holt, SD, 2004. The trnL-F plastid DNA region and its application to phylogeographic analysis in Poa pratensis agg. Dissertation, Masaryk University, Czech Republic." title="The trnL-F plastid DNA region and its application to phylogeographic analysis in Poa pratensis agg. Dissertation, Masaryk University, Czech Republic." year="2004">Stoneberg-Holt 2004</bibRefCitation>
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). Separation of
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<taxonomicName authorityName="L., Sp. Pl. 1: 67 - 68" authorityYear="1753" class="Liliopsida" family="Poaceae" genus="Poa" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="" order="Poales" pageId="45" pageNumber="46" phylum="Tracheophyta" rank="species" species="pratensis">
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<emphasis italics="true" pageId="45" pageNumber="46">Poa pratensis</emphasis>
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</taxonomicName>
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subsp.
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<emphasis italics="true" pageId="45" pageNumber="46">agassizensis</emphasis>
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from
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<taxonomicName authorityName="L., Sp. Pl. 1: 67 - 68" authorityYear="1753" class="Liliopsida" family="Poaceae" genus="Poa" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="" order="Poales" pageId="45" pageNumber="46" phylum="Tracheophyta" rank="species" species="pratensis">
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<emphasis italics="true" pageId="45" pageNumber="46">Poa pratensis</emphasis>
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</taxonomicName>
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subsp.
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<emphasis italics="true" pageId="45" pageNumber="46">pratensis</emphasis>
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is
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<pageBreakToken pageId="46" pageNumber="47" start="start">difficult</pageBreakToken>
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, and so far there is no molecular or cytological data to support it as a separate taxon. We recognize
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<taxonomicName authorityName="L., Sp. Pl. 1: 67 - 68" authorityYear="1753" class="Liliopsida" family="Poaceae" genus="Poa" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="" order="Poales" pageId="46" pageNumber="47" phylum="Tracheophyta" rank="species" species="pratensis">
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<emphasis italics="true" pageId="46" pageNumber="47">Poa pratensis</emphasis>
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</taxonomicName>
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subsp.
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<emphasis italics="true" pageId="46" pageNumber="47">agassizensis</emphasis>
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as a marginally distinct taxon, and site a few vouchers that best match this form.
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</paragraph>
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</subSubSection>
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</treatment>
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</document> |