344 lines
29 KiB
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344 lines
29 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="9DAB42702547622ECC503C2B3CB5323A" 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 annua L., Sp. Pl. 1: 68 1753" docType="treatment" docVersion="6" id="FF9AC356FFDAFB26FF95FFE3FFA1520C" lastPageNumber="13" 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="10" 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="152024349" LSID="urn:lsid:plazi:treatment:9DAB42702547622ECC503C2B3CB5323A" httpUri="http://treatment.plazi.org/id/9DAB42702547622ECC503C2B3CB5323A" lastPageId="12" lastPageNumber="13" pageId="9" pageNumber="10">
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<subSubSection pageId="9" pageNumber="10" type="nomenclature">
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<paragraph pageId="9" pageNumber="10">
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2.
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<taxonomicName LSID="9DAB4270-2547-622E-CC50-3C2B3CB5323A" authority="L., Sp. Pl. 1: 68 1753." authorityName="L., Sp. Pl. 1: 68" authorityYear="1753" class="Liliopsida" family="Poaceae" genus="Poa" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="Poa annua" order="Poales" pageId="9" pageNumber="10" phylum="Tracheophyta" rank="species" species="annua">Poa annua L., Sp. Pl. 1: 68 1753.</taxonomicName>
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<figureCitation captionStart="Figure 2" captionStartId="F2" captionText="Figure 2. A-E Poa annua L. A habit B inflorescence C glumes D floret with palea and anthers E florets F-H Poa infirma Kunth F habit G spikelet H floret with palea and anthers. Drawings from Soreng (2007)." httpUri="https://binary.pensoft.net/fig/10137" pageId="9" pageNumber="10">Fig. 2 A-E</figureCitation>
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</paragraph>
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</subSubSection>
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<subSubSection pageId="9" pageNumber="10" type="reference_group">
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<paragraph pageId="9" pageNumber="10">
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<taxonomicName authorityName="H. Scholz" authorityYear="2003" baseAuthorityName="L." class="Liliopsida" family="Poaceae" genus="Ochlopoa" higherTaxonomySource="GBIF" kingdom="Plantae" lsidName="" order="Poales" pageId="9" pageNumber="10" phylum="Tracheophyta" rank="species" species="annua">Ochlopoa annua</taxonomicName>
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(L.) H. Scholz, Ber. Inst. Lanschafts- Pflanzenokologie Univ. Hohenheim Beih. 16: 58. 2003. Type:Habitat in Europa ad vias. (lectotype: LINN-87.17!, right-hand plant, designated by
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<bibRefCitation author="Soreng, RJ" journalOrPublisher="Taxon" pageId="69" pageNumber="70" pagination="239 - 260" refId="B47" refString="Soreng, RJ, 2000. Poa lectotypifications In: Cafferty S, Jarvis CE, Turland NJ. Typification of Linnaean plant names in the Poaceae (Gramineae). Taxon 49 (2): 239 - 260" title="Poa lectotypifications In: Cafferty S, Jarvis CE, Turland NJ. Typification of Linnaean plant names in the Poaceae (Gramineae)." volume="49" year="2000">Soreng 2000</bibRefCitation>
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: 254).
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</paragraph>
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</subSubSection>
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<subSubSection lastPageId="10" lastPageNumber="11" pageId="9" pageNumber="10" type="description">
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<paragraph pageId="9" pageNumber="10">Description.</paragraph>
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<paragraph lastPageId="10" lastPageNumber="11" pageId="9" pageNumber="10">
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Gynomonoecious.
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<emphasis bold="true" pageId="9" pageNumber="10">Annuals</emphasis>
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(rarely surviving for a second season); tufted, infrequently short stooling, tufts generally small, bases usually narrow, green to light green; tillers intravaginal (each subtended by a single 2-keeled, longitudinally split prophyll over 0.5 cm long), without cataphyllous shoots, most shoots eventually flowering.
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<emphasis bold="true" pageId="9" pageNumber="10">Culms</emphasis>
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2-20(-45) cm tall, spreading to erect, sometimes geniculate, leafy,
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<pageBreakToken pageId="10" pageNumber="11" start="start">slender</pageBreakToken>
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, terete, smooth; usually 1 nodes.
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<emphasis bold="true" pageId="10" pageNumber="11">Leaf</emphasis>
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sheaths terete or weakly compressed, smooth, glabrous; butt sheaths papery, smooth glabrous; flag leaf sheaths 1-6 cm long, margins fused ca. 33% the length; throats and collars smooth, glabrous; ligules 0.5-3(-5) mm long, decurrent, abaxially smooth, glabrous, apices obtuse to truncate; blades 1-10 cm long, 1-3(-6) mm wide, flat or weakly folded, thin, soft. smooth, margins usually slightly scabrous, broadly prow-tipped; blades all about equal in length, flag leaf blades well developed.
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<emphasis bold="true" pageId="10" pageNumber="11">Panicles</emphasis>
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1-7(-10) cm long, 1.2-1.6
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<normalizedToken originalValue="×">x</normalizedToken>
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long as wide, erect, open, pyramidal to rhomboid, moderately congested to sparse; rachis with 1-2(-3) branches per node; primary branches ascending to spreading or reflexed, straight, terete or sulcate, smooth; lateral pedicels less than 1/3 the spikelet in length, smooth; longest branches 2-4(-5) cm, spikelets crowded or loosely arranged.
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<emphasis bold="true" pageId="10" pageNumber="11">Spikelets</emphasis>
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3-5 mm long, ovate, laterally compressed; not bulbiferous; florets 2-6, proximal hermaphroditic, distal often pistillate; rachilla internodes terete, smooth, glabrous, more or less concealed or exposed, distal internode less than 1/2(-3/4) length of distal lemma; glumes unequal, smooth, distinctly keeled, keels smooth; apex acuminate to acute or obtuse, sharp pointed or slightly blunt; lower glumes 1-2.2 mm long, 1-veined, narrowly lanceolate, often slightly sickle shaped, or subulate, apex acute; upper glumes 1.5-2.5 mm long, shorter than or subequaling lowest lemma,3-veined, lanceolate to oblanceolate, apex obtuse to acute; calluses glabrous; lemmas 2.2-3.3(-4) mm long, broadly lanceolate, green to light green, sometimes slightly anthocyanic, distinctly keeled, smooth throughout, keels, marginal, and usually intermediate veins moderately to densely crisply puberulent to long villous, rarely glabrous throughout, between veins glabrous, intermediate veins prominent, margins and edges smooth, apices obtuse to acute; paleas keels smooth, short to long villous, rarely glabrous over the keels.
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<emphasis bold="true" pageId="10" pageNumber="11">Flowers</emphasis>
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cleistogamous to chasmogamous; lodicules 0.45-0.5 mm long, broadly lanceolate to ovate, with 1 (rarely 2) short lateral lobe(s); anthers 0.6-1.1 mm long, oblong prior to dehiscence, often vestigial in distal flowers of a spikelet.
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<emphasis bold="true" pageId="10" pageNumber="11">Caryopses</emphasis>
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1.6-1.8 mm long, elliptical in side-view, subcylindrical in cross-section, light brown, sulcus almost flat, hilum 0.15 mm long, oval, grain free or adherent to the palea. 2
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<emphasis italics="true" pageId="10" pageNumber="11">n</emphasis>
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= 28.
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</paragraph>
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</subSubSection>
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<subSubSection pageId="10" pageNumber="11" type="distribution">
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<paragraph pageId="10" pageNumber="11">Distribution.</paragraph>
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<paragraph pageId="10" pageNumber="11">
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The species is distributed Worldwide, primarily in temperate and subtropical regions. In Mexico it is recorded from all states, except Campeche, Nayarit, Quintana Roo, Sinaloa, Tabasco, and
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<normalizedToken originalValue="Yucatán">Yucatan</normalizedToken>
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.
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</paragraph>
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</subSubSection>
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<subSubSection pageId="10" pageNumber="11" type="ecology">
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<paragraph pageId="10" pageNumber="11">Ecology.</paragraph>
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<paragraph pageId="10" pageNumber="11">The species is a gynomonoecious, ruderal annual (infrequently a short-lived perennial), and is found in waste ground, lawns, gardens, trails, sidewalks, roadsides, fields ranging from sea level to over 4500 m. The species can potentially flower throughout the year.</paragraph>
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</subSubSection>
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<subSubSection lastPageId="11" lastPageNumber="12" pageId="10" pageNumber="11" type="specimens examined">
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<paragraph pageId="10" pageNumber="11">Specimens examined.</paragraph>
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<paragraph lastPageId="11" lastPageNumber="12" pageId="10" pageNumber="11">
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Mexico.
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<emphasis bold="true" pageId="10" pageNumber="11">Aguascalientes:</emphasis>
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Municipio Aguascalientes, Aguascalientes, 18 Sep 1978, J.A.Zamarripa-D. (MEXU).
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<emphasis bold="true" pageId="10" pageNumber="11">Baja California:</emphasis>
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Guadalupe Island, North Twin
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<normalizedToken originalValue="Cañon">Canon</normalizedToken>
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, 50 m, 24 Apr 1958, R.Moran 6622 (US).
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<emphasis bold="true" pageId="10" pageNumber="11">Baja California Sur:</emphasis>
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reported by Espejo Serna and Lopez Ferrari (2000).
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<emphasis bold="true" pageId="10" pageNumber="11">Chiapas:</emphasis>
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Escuintla, 3 Oct 1936, E.Matuda 312 (US).
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<emphasis bold="true" pageId="10" pageNumber="11">Chihuahua:</emphasis>
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vic. of Chihuahua, 1300 m, 27 Apr 1908, E.Palmer 28 (US).
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<emphasis bold="true" pageId="10" pageNumber="11">Coahuila:</emphasis>
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Saltillo, Apr 1898, E.Palmer 6 (US).
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<emphasis bold="true" pageId="10" pageNumber="11">Colima:</emphasis>
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reported by Espejo Serna and Lopez Ferrari (2000).
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<emphasis bold="true" pageId="10" pageNumber="11">Durango:</emphasis>
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Durango,
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<pageBreakToken pageId="11" pageNumber="12" start="start">Apr</pageBreakToken>
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1896, E.Palmer 97 (TAES, US).
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<emphasis bold="true" pageId="11" pageNumber="12">Distrito Federal:</emphasis>
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Azcapotzalco, 27-30 Jul 1910, A.S.Hitchcock 5929 (US).
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<emphasis bold="true" pageId="11" pageNumber="12">Guanajuato:</emphasis>
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Municipio Cortazar, Ejido del Rancho del la Gavia, 2330 m, 9 Oct 1996, s. collector (MEXU).
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<emphasis bold="true" pageId="11" pageNumber="12">Guerrero:</emphasis>
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Municipio Tlacotepec, Cerro Teotepec, 3350 m, 5 Dec 1963, J.Rzedowski 18145 (MEXU, MSC). Municipio General Heliodoro Castillo, El Jilguero, 2600 m, 30 Oct 1998, N.Diego 8146, B.Ludlow & A.Acosta (MEXU, lemmas glabrous or nearly glabrous).
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<emphasis bold="true" pageId="11" pageNumber="12">Hidalgo:</emphasis>
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Pachuca, 6-7 Sep 1910, A.S.Hitchcock 6747 (US).
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<emphasis bold="true" pageId="11" pageNumber="12">Jalisco:</emphasis>
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Mt. Nevada, 23-24 Sep 1910, A.S.Hitchcock 7154 (US).
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<emphasis bold="true" pageId="11" pageNumber="12">
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<normalizedToken originalValue="Michoacán">Michoacan</normalizedToken>
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:
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</emphasis>
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8-10 mi NW of Ciudad Hidalgo, 2850-3000 m, 18 Mar 1949, R.McVaugh 9902 (US). Municipio Tallpujahua, Presa Brockman, 2760 m, I.
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<normalizedToken originalValue="García">Garcia</normalizedToken>
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3603 & Y.H.-deG (MEXU, stooling form).
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<emphasis bold="true" pageId="11" pageNumber="12">Morelos:</emphasis>
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Morelos, El Parque, 31 Aug 1910, C.R.Orcutt 3858 (US).
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<emphasis bold="true" pageId="11" pageNumber="12">Mexico:</emphasis>
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woods near El Oro, 9000 ft [2745 m], 14 Sep 1901, C.G. Pringle 9589 (TAES).Ixtaccihuatl, Oct 1905, C.A.Purpus 1618 (US).
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<emphasis bold="true" pageId="11" pageNumber="12">
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Nuevo
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<normalizedToken originalValue="León">Leon</normalizedToken>
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:
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</emphasis>
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Cerro
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<normalizedToken originalValue="Potosí">Potosi</normalizedToken>
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, 9000 ft [2745 m], 7 Jul 1963, R.L.McGregor 267, L.J.Harms, A.J.Robinson, R.del Rosario, R.Segal (US).
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<emphasis bold="true" pageId="11" pageNumber="12">Oaxaca:</emphasis>
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Oaxaca, 5000 ft [1525 m], 30 May 1894, C.G.Pringle 4671 (US).
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<emphasis bold="true" pageId="11" pageNumber="12">Puebla:</emphasis>
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<normalizedToken originalValue="Tehuacán">Tehuacan</normalizedToken>
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, 9 Aug 1910, A.S.Hitchcock 6049 (US), Ixtaccihuatl S flank, in circ E of the "portal" N of La Amacuilecatl "Los Pies",
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<geoCoordinate degrees="19.1543" direction="north" orientation="latitude" precision="5" value="19.1543">19.1543°N</geoCoordinate>
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;
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<geoCoordinate degrees="98.6307" direction="west" orientation="longitude" precision="5" value="-98.6307">98.6307°W</geoCoordinate>
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, 4400 m, 2 Oct 1987, R.J.Soreng 3323 & N.Soreng (US, stooling form).
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<emphasis bold="true" pageId="11" pageNumber="12">
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<normalizedToken originalValue="Querétaro">Queretaro</normalizedToken>
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:
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</emphasis>
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<normalizedToken originalValue="Querétaro">Queretaro</normalizedToken>
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, 24-25 Jul 1910, A.S.Hitchcock 5829 (US).
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<emphasis bold="true" pageId="11" pageNumber="12">
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San Luis
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<normalizedToken originalValue="Potosí">Potosi</normalizedToken>
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:
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</emphasis>
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Alvarez, 28 Sep to 3 Oct 1902, E.Palmer 173 (US).
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<emphasis bold="true" pageId="11" pageNumber="12">Sonora:</emphasis>
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Guadalajara, Jul-Oct 1886, E.Palmer 483 (US).
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<emphasis bold="true" pageId="11" pageNumber="12">Tamaulipas:</emphasis>
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Reported (Espejo Serna and Lopez Ferrari 2000).
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<emphasis bold="true" pageId="11" pageNumber="12">Tlaxcala:</emphasis>
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Municipio A. Arista, 5 km al sur de San. Felipe Hidalgo, 3000 m, 15 Dec 1988, R.Acosta 2689 & M.
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<normalizedToken originalValue="Sánchez">Sanchez</normalizedToken>
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(MEXU).
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<emphasis bold="true" pageId="11" pageNumber="12">Veracruz:</emphasis>
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Jalapa, 4600' [1400 m], 2-4 Sep 1910, A.S.Hitchcock 6625 (US).
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<emphasis bold="true" pageId="11" pageNumber="12">Zacatecas:</emphasis>
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near Plateado, 1 Sep 1897, J.N.Rose 2712 (US).
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</paragraph>
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</subSubSection>
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<subSubSection lastPageId="12" lastPageNumber="13" pageId="11" pageNumber="12" type="discussion">
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<paragraph pageId="11" pageNumber="12">Discussion.</paragraph>
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<paragraph lastPageId="12" lastPageNumber="13" pageId="11" pageNumber="12">
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This Old World species is naturalized throughout temperate regions of the New World. The species was already widespread in Mexico by the mid-1800's: Popocatepetl,
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<emphasis italics="true" pageId="11" pageNumber="12">H.G. Galeotti 5828</emphasis>
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,
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<emphasis italics="true" pageId="11" pageNumber="12">5854</emphasis>
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(US fragm. ex CAEN in 1837-1847); Orizaba,
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<emphasis italics="true" pageId="11" pageNumber="12">
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F.
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<normalizedToken originalValue="Müller">Mueller</normalizedToken>
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2094
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</emphasis>
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(US fragm. ex P in the 1850's); and San Luis
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<normalizedToken originalValue="Potosí">Potosi</normalizedToken>
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,
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<emphasis italics="true" pageId="11" pageNumber="12">
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M.
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<normalizedToken originalValue="Virlet-d’Aoust">Virlet-d'Aoust</normalizedToken>
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1372
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</emphasis>
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,
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<emphasis italics="true" pageId="11" pageNumber="12">1394</emphasis>
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(US fragm. ex P in 1851). Above we list a single specimen per state for this species, except when there is notable morphological variation. We cite the oldest voucher seen that came from the state. The species probably occurs sporadically in additional states and is surely in Sinaloa but without a collection. Plants from wet areas at high altitudes can perenniate by rooting at the nodes (noted in specimens cited from
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<normalizedToken originalValue="Michoacán">Michoacan</normalizedToken>
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and Puebla), and such forms have been called
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<taxonomicName authorityName="L., Sp. Pl. 1: 68" authorityYear="1753" class="Liliopsida" family="Poaceae" genus="Poa" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="" order="Poales" pageId="11" pageNumber="12" phylum="Tracheophyta" rank="species" species="annua">
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<emphasis italics="true" pageId="11" pageNumber="12">Poa annua</emphasis>
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</taxonomicName>
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var.
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<emphasis italics="true" pageId="11" pageNumber="12">reptans</emphasis>
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Hausskn. We suspect that such forms arise repeatedly in plastic response to the environmental conditions, rather than from unique genetic variation, and are not particularly useful to recognize taxonomically. A form with the lemmas and paleas glabrous or nearly glabrous occurs sporadically around the world, and has been found in Guerrero. All collections from Mexico we have seen identified as "
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<taxonomicName authorityName="Kunth, Nov. Gen. Sp. (quarto ed.) 1: 158. 1815" authorityYear="1816" class="Liliopsida" family="Poaceae" genus="Poa" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="" order="Poales" pageId="11" pageNumber="12" phylum="Tracheophyta" rank="species" species="infirma">
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<emphasis italics="true" pageId="11" pageNumber="12">Poa infirma</emphasis>
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</taxonomicName>
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" belong to
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<taxonomicName authorityName="L., Sp. Pl. 1: 68" authorityYear="1753" class="Liliopsida" family="Poaceae" genus="Poa" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="" order="Poales" pageId="11" pageNumber="12" phylum="Tracheophyta" rank="species" species="annua">
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<emphasis italics="true" pageId="11" pageNumber="12">Poa annua</emphasis>
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</taxonomicName>
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, and only one specimen was redetermined by us as
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<taxonomicName authorityName="Kunth, Nov. Gen. Sp. (quarto ed.) 1: 158. 1815" authorityYear="1816" class="Liliopsida" family="Poaceae" genus="Poa" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="" order="Poales" pageId="11" pageNumber="12" phylum="Tracheophyta" rank="species" species="infirma">
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<emphasis italics="true" pageId="11" pageNumber="12">Poa infirma</emphasis>
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</taxonomicName>
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from among hundreds of
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<taxonomicName authorityName="L., Sp. Pl. 1: 68" authorityYear="1753" class="Liliopsida" family="Poaceae" genus="Poa" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="" order="Poales" pageId="11" pageNumber="12" phylum="Tracheophyta" rank="species" species="annua">
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<emphasis italics="true" pageId="11" pageNumber="12">Poa annua</emphasis>
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</taxonomicName>
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specimens. DNA data support the hypothesis that
|
||
<taxonomicName authorityName="L., Sp. Pl. 1: 68" authorityYear="1753" class="Liliopsida" family="Poaceae" genus="Poa" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="" order="Poales" pageId="11" pageNumber="12" phylum="Tracheophyta" rank="species" species="annua">
|
||
<emphasis italics="true" pageId="11" pageNumber="12">Poa annua</emphasis>
|
||
</taxonomicName>
|
||
, a tetraploid species, arose from hybridization between two Eurasian diploid species,
|
||
<taxonomicName authorityName="Kunth, Nov. Gen. Sp. (quarto ed.) 1: 158. 1815" authorityYear="1816" class="Liliopsida" family="Poaceae" genus="Poa" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="" order="Poales" pageId="11" pageNumber="12" phylum="Tracheophyta" rank="species" species="infirma">
|
||
<emphasis italics="true" pageId="11" pageNumber="12">Poa infirma</emphasis>
|
||
</taxonomicName>
|
||
<normalizedToken originalValue="×">x</normalizedToken>
|
||
<emphasis italics="true" pageId="11" pageNumber="12">supina</emphasis>
|
||
Schrad. (
|
||
<bibRefCitation author="Soreng, RJ" journalOrPublisher="Madrono" pageId="69" pageNumber="70" refId="B52" refString="Soreng, RJ, Bull, RD, Gillespie, LJ, 2010. Phylogeny and reticulation in Poa L. based on plastid trnTLF and nrITS sequences with attention to diploids. In: Seberg O, Petersen G, Barfod AS, Davis JI (Eds) Diversity, Phylogeny, and Evolution in the Monocotyledons, Aarhus University Press, Aarhus, 619-643." title="Phylogeny and reticulation in Poa L. based on plastid trnTLF and nrITS sequences with attention to diploids. In: Seberg O, Petersen G, Barfod AS, Davis JI (Eds) Diversity, Phylogeny, and Evolution in the Monocotyledons, Aarhus University Press, Aarhus, 619 - 643." year="2010">Soreng et al. 2010</bibRefCitation>
|
||
).
|
||
<taxonomicName authorityName="Kunth, Nov. Gen. Sp. (quarto ed.) 1: 158. 1815" authorityYear="1816" class="Liliopsida" family="Poaceae" genus="Poa" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="" order="Poales" pageId="11" pageNumber="12" phylum="Tracheophyta" rank="species" species="infirma">
|
||
<emphasis italics="true" pageId="11" pageNumber="12">Poa infirma</emphasis>
|
||
</taxonomicName>
|
||
is a short-lived annual and
|
||
<taxonomicName class="Liliopsida" family="Poaceae" genus="Poa" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="" order="Poales" pageId="11" pageNumber="12" phylum="Tracheophyta" rank="species" species="supina">
|
||
<emphasis italics="true" pageId="11" pageNumber="12">Poa supina</emphasis>
|
||
</taxonomicName>
|
||
is a stoloniferous
|
||
<pageBreakToken pageId="12" pageNumber="13" start="start">perennial</pageBreakToken>
|
||
. Species of this complex [
|
||
<taxonomicName class="Liliopsida" family="Poaceae" genus="Poa" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="" order="Poales" pageId="12" pageNumber="13" phylum="Tracheophyta" rank="genus">
|
||
<emphasis italics="true" pageId="12" pageNumber="13">Poa</emphasis>
|
||
</taxonomicName>
|
||
sect.
|
||
<taxonomicName class="Liliopsida" family="Poaceae" genus="Micrantherae" higherTaxonomySource="GBIF" kingdom="Plantae" lsidName="" order="Poales" pageId="12" pageNumber="13" phylum="Tracheophyta" rank="genus">
|
||
<emphasis italics="true" pageId="12" pageNumber="13">Micrantherae</emphasis>
|
||
</taxonomicName>
|
||
Stapf; syn.
|
||
<taxonomicName class="Liliopsida" family="Poaceae" genus="Poa" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="" order="Poales" pageId="12" pageNumber="13" phylum="Tracheophyta" rank="genus">
|
||
<emphasis italics="true" pageId="12" pageNumber="13">Poa</emphasis>
|
||
</taxonomicName>
|
||
sect.
|
||
<taxonomicName class="Liliopsida" family="Poaceae" genus="Ochlopoa" higherTaxonomySource="GBIF" kingdom="Plantae" lsidName="" order="Poales" pageId="12" pageNumber="13" phylum="Tracheophyta" rank="genus">
|
||
<emphasis italics="true" pageId="12" pageNumber="13">Ochlopoa</emphasis>
|
||
</taxonomicName>
|
||
Asch. & Graebn.,
|
||
<taxonomicName class="Liliopsida" family="Poaceae" genus="Ochlopoa" higherTaxonomySource="GBIF" kingdom="Plantae" lsidName="" order="Poales" pageId="12" pageNumber="13" phylum="Tracheophyta" rank="genus">
|
||
<emphasis italics="true" pageId="12" pageNumber="13">Ochlopoa</emphasis>
|
||
</taxonomicName>
|
||
(Asch. & Graebn.) H. Scholz.] have spikelets with perfect lower florets and pistillate upper florets, smooth branches and spikelet bracts, and soft puberulent lemma keels and marginal veins, soft puberulent palea keels, and glabrous calluses.
|
||
<taxonomicName authorityName="L., Sp. Pl. 1: 68" authorityYear="1753" class="Liliopsida" family="Poaceae" genus="Poa" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="" order="Poales" pageId="12" pageNumber="13" phylum="Tracheophyta" rank="species" species="annua">
|
||
<emphasis italics="true" pageId="12" pageNumber="13">Poa annua</emphasis>
|
||
</taxonomicName>
|
||
frequently approaches
|
||
<taxonomicName authorityName="Kunth, Nov. Gen. Sp. (quarto ed.) 1: 158. 1815" authorityYear="1816" class="Liliopsida" family="Poaceae" genus="Poa" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="" order="Poales" pageId="12" pageNumber="13" phylum="Tracheophyta" rank="species" species="infirma">
|
||
<emphasis italics="true" pageId="12" pageNumber="13">Poa infirma</emphasis>
|
||
</taxonomicName>
|
||
in form, presumably in part due to expression of particular genes, or segregation of those genes toward the parental species. This hypothesis explains the difficulty of identifying true diploid
|
||
<taxonomicName authorityName="Kunth, Nov. Gen. Sp. (quarto ed.) 1: 158. 1815" authorityYear="1816" class="Liliopsida" family="Poaceae" genus="Poa" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="" order="Poales" pageId="12" pageNumber="13" phylum="Tracheophyta" rank="species" species="infirma">
|
||
<emphasis italics="true" pageId="12" pageNumber="13">Poa infirma</emphasis>
|
||
</taxonomicName>
|
||
. In a separate review of US New World specimens previously identified as
|
||
<taxonomicName authorityName="L., Sp. Pl. 1: 68" authorityYear="1753" class="Liliopsida" family="Poaceae" genus="Poa" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="" order="Poales" pageId="12" pageNumber="13" phylum="Tracheophyta" rank="species" species="annua">
|
||
<emphasis italics="true" pageId="12" pageNumber="13">Poa annua</emphasis>
|
||
</taxonomicName>
|
||
or
|
||
<taxonomicName authorityName="Kunth, Nov. Gen. Sp. (quarto ed.) 1: 158. 1815" authorityYear="1816" class="Liliopsida" family="Poaceae" genus="Poa" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="" order="Poales" pageId="12" pageNumber="13" phylum="Tracheophyta" rank="species" species="infirma">
|
||
<emphasis italics="true" pageId="12" pageNumber="13">Poa infirma</emphasis>
|
||
</taxonomicName>
|
||
by Hildemar Scholz (B, dets. of 2007), only one specimen from Central America was identified as other than
|
||
<taxonomicName authorityName="L., Sp. Pl. 1: 68" authorityYear="1753" class="Liliopsida" family="Poaceae" genus="Poa" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="" order="Poales" pageId="12" pageNumber="13" phylum="Tracheophyta" rank="species" species="annua">
|
||
<emphasis italics="true" pageId="12" pageNumber="13">Poa annua</emphasis>
|
||
</taxonomicName>
|
||
(see
|
||
<taxonomicName authorityName="Kunth, Nov. Gen. Sp. (quarto ed.) 1: 158. 1815" authorityYear="1816" class="Liliopsida" family="Poaceae" genus="Poa" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="" order="Poales" pageId="12" pageNumber="13" phylum="Tracheophyta" rank="species" species="infirma">
|
||
<emphasis italics="true" pageId="12" pageNumber="13">Poa infirma</emphasis>
|
||
</taxonomicName>
|
||
discussion below).
|
||
</paragraph>
|
||
<caption httpUri="https://binary.pensoft.net/fig/10137" pageId="12" pageNumber="13" start="Figure 2" startId="F2">
|
||
<paragraph pageId="12" pageNumber="13">
|
||
<emphasis bold="true" pageId="12" pageNumber="13">Figure 2.</emphasis>
|
||
<emphasis bold="true" pageId="12" pageNumber="13">A-E</emphasis>
|
||
<taxonomicName authorityName="L., Sp. Pl. 1: 68" authorityYear="1753" class="Liliopsida" family="Poaceae" genus="Poa" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="" order="Poales" pageId="12" pageNumber="13" phylum="Tracheophyta" rank="species" species="annua">
|
||
<emphasis italics="true" pageId="12" pageNumber="13">Poa annua</emphasis>
|
||
</taxonomicName>
|
||
L.
|
||
<emphasis bold="true" pageId="12" pageNumber="13">A</emphasis>
|
||
habit
|
||
<emphasis bold="true" pageId="12" pageNumber="13">B</emphasis>
|
||
inflorescence
|
||
<emphasis bold="true" pageId="12" pageNumber="13">C</emphasis>
|
||
glumes
|
||
<emphasis bold="true" pageId="12" pageNumber="13">D</emphasis>
|
||
floret with palea and anthers
|
||
<emphasis bold="true" pageId="12" pageNumber="13">E</emphasis>
|
||
florets
|
||
<emphasis bold="true" pageId="12" pageNumber="13">F-H</emphasis>
|
||
<taxonomicName authorityName="Kunth, Nov. Gen. Sp. (quarto ed.) 1: 158. 1815" authorityYear="1816" class="Liliopsida" family="Poaceae" genus="Poa" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="" order="Poales" pageId="12" pageNumber="13" phylum="Tracheophyta" rank="species" species="infirma">
|
||
<emphasis italics="true" pageId="12" pageNumber="13">Poa infirma</emphasis>
|
||
</taxonomicName>
|
||
Kunth
|
||
<emphasis bold="true" pageId="12" pageNumber="13">F</emphasis>
|
||
habit
|
||
<emphasis bold="true" pageId="12" pageNumber="13">G</emphasis>
|
||
spikelet
|
||
<emphasis bold="true" pageId="12" pageNumber="13">H</emphasis>
|
||
floret with palea and anthers. Drawings from
|
||
<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>
|
||
.
|
||
</paragraph>
|
||
</caption>
|
||
</subSubSection>
|
||
</treatment>
|
||
</document> |