266 lines
22 KiB
XML
266 lines
22 KiB
XML
<document ID-DOI="http://dx.doi.org/10.3897/phytokeys.148.50042" ID-GBIF-Dataset="1224cf7b-1d2d-4657-89e9-11fee1f5ea0b" ID-PMC="PMC7266835" ID-Pensoft-Pub="1314-2003-148-21" ID-Pensoft-UUID="6E288E0A8F725B2787799DD17F2B1642" ID-PubMed="32523392" ModsDocID="1314-2003-148-21" checkinTime="1590560163243" checkinUser="pensoft" docAuthor="Sylvester, Steven P., Peterson, Paul M., Romaschenko, Konstantin, Bravo-Pedraza, William J., Cuta-Alarcon, Lia E. & Soreng, Robert J." docDate="2020" docId="A459F44699CC53FB8BF8DDFD1C2F21CF" docLanguage="en" docName="PhytoKeys 148: 21-50" docOrigin="PhytoKeys 148" docSource="http://dx.doi.org/10.3897/phytokeys.148.50042" docTitle="Podagrostis exserta Sylvester & Soreng 2020, comb. nov." docType="treatment" docVersion="4" id="6E288E0A8F725B2787799DD17F2B1642" lastPageNumber="21" masterDocId="6E288E0A8F725B2787799DD17F2B1642" masterDocTitle="New combinations and updated descriptions in Podagrostis (Agrostidinae, Poaceae) from the Neotropics and Mexico" masterLastPageNumber="50" masterPageNumber="21" pageNumber="21" updateTime="1668139801695" 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>New combinations and updated descriptions in Podagrostis (Agrostidinae, Poaceae) from the Neotropics and Mexico</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>Sylvester, Steven P.</mods:namePart>
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<mods:affiliation>College of Biology and the Environment, Nanjing Forestry University, Long Pan Road No. 159, Nanjing, 210037, China & Royal Botanic Gardens, Kew, Richmond, Surrey, TW 9 3 AE, UK</mods:affiliation>
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<mods:nameIdentifier type="orcid">https://orcid.org/0000-0001-5577-8782</mods:nameIdentifier>
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<mods:nameIdentifier type="email">steven_sylvester@hotmail.com</mods:nameIdentifier>
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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 20560, 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>Romaschenko, Konstantin</mods:namePart>
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<mods:affiliation>Department of Botany, National Museum of Natural History, Smithsonian Institution, Washington DC 20560, 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>Bravo-Pedraza, William J.</mods:namePart>
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<mods:affiliation>Grupo Sistematica Biologica, Herbario UPTC, Escuela de Biologia, Facultad de Ciencias, Universidad Pedagogica y Tecnologica de Colombia, Avenida Central del Norte 39 - 115, Tunja-Boyaca, Colombia</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>Cuta-Alarcon, Lia E.</mods:namePart>
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<mods:affiliation>Grupo Sistematica Biologica, Herbario UPTC, Escuela de Biologia, Facultad de Ciencias, Universidad Pedagogica y Tecnologica de Colombia, Avenida Central del Norte 39 - 115, Tunja-Boyaca, Colombia</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>Soreng, Robert J.</mods:namePart>
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<mods:affiliation>Department of Botany, National Museum of Natural History, Smithsonian Institution, Washington DC 20560, USA</mods:affiliation>
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<mods:nameIdentifier type="orcid">https://orcid.org/0000-0002-8358-4915</mods:nameIdentifier>
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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>2020</mods:date>
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<mods:detail type="volume">
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<mods:number>148</mods:number>
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</mods:detail>
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<mods:extent unit="page">
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<mods:start>21</mods:start>
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<mods:end>50</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.148.50042</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.148.50042</mods:identifier>
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<mods:identifier type="Pensoft-Pub">1314-2003-148-21</mods:identifier>
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<mods:identifier type="Pensoft-UUID">6E288E0A8F725B2787799DD17F2B1642</mods:identifier>
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</mods:mods>
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<treatment ID-GBIF-Taxon="164360811" LSID="urn:lsid:plazi:treatment:A459F44699CC53FB8BF8DDFD1C2F21CF" httpUri="http://treatment.plazi.org/id/A459F44699CC53FB8BF8DDFD1C2F21CF" lastPageNumber="21" pageId="0" pageNumber="21">
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<subSubSection pageId="0" pageNumber="21" type="nomenclature">
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<paragraph pageId="0" pageNumber="21">
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<taxonomicName LSID="A459F446-99CC-53FB-8BF8-DDFD1C2F21CF" authority="(Swallen) Sylvester & Soreng" authorityName="Sylvester & Soreng" authorityYear="2020" baseAuthorityName="Sylvester & Soreng" baseAuthorityYear="2020" class="Liliopsida" family="Poaceae" genus="Podagrostis" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="Podagrostis exserta" order="Poales" pageId="0" pageNumber="21" phylum="Tracheophyta" rank="species" species="exserta" status="comb. nov.">Podagrostis exserta (Swallen) Sylvester & Soreng</taxonomicName>
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<taxonomicNameLabel pageId="0" pageNumber="21">comb. nov.</taxonomicNameLabel>
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<figureCitation captionStart="Figure 2" captionStartId="F2" captionText="Figure 2. Podagrostis exserta. A Whole plant B Spikelets, the upper glume of the left-hand spikelet has been removed to reveal the rachilla prolongation (indicated with a red arrow) C leaf blade adaxial view, showing scabers on the adaxial surface and smooth abaxial surface of the leaf blade. A Digitized image of specimen J. H. Beaman 3873 (US 01247246) courtesy of United States National Herbarium (US) B, C images of specimen G. L. Webster 11826 (US 3336153)." figureDoi="10.3897/phytokeys.148.50042.figure2" httpUri="https://binary.pensoft.net/fig/413783" pageId="0" pageNumber="21">Fig. 2</figureCitation>
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</paragraph>
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</subSubSection>
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<subSubSection pageId="0" pageNumber="21" type="reference_group">
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<paragraph pageId="0" pageNumber="21">
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<taxonomicName authorityName="Swallen" authorityYear="1950" class="Liliopsida" family="Poaceae" genus="Agrostis" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="Agrostis exserta" order="Poales" pageId="0" pageNumber="21" phylum="Tracheophyta" rank="species" species="exserta">Agrostis exserta</taxonomicName>
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Swallen, Contr. U.S. Natl. Herb. 29(9): 404. 1950.
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</paragraph>
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</subSubSection>
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<subSubSection pageId="0" pageNumber="21" type="materials_examined">
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<paragraph pageId="0" pageNumber="21">Type.</paragraph>
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<paragraph pageId="0" pageNumber="21">
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Guatemala. Dept. Huehuetenango: collected in alpine area, vicinity of Tojquia, Sierra de los Cuchumatanes, 3700 m alt., 5 Aug. 1942, J.A. Steyermark 50119 (
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<emphasis bold="true" italics="true" pageId="0" pageNumber="21">holotype</emphasis>
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: US (US00131747 [not seen]);
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<emphasis bold="true" italics="true" pageId="0" pageNumber="21">isotype</emphasis>
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: US (US00131748 [not seen])).
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</paragraph>
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<caption doi="10.3897/phytokeys.148.50042.figure2" httpUri="https://binary.pensoft.net/fig/413783" pageId="0" pageNumber="21" start="Figure 2" startId="F2">
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<paragraph pageId="0" pageNumber="21">
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<emphasis bold="true" pageId="0" pageNumber="21">Figure 2.</emphasis>
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<taxonomicName authorityName="Sylvester & Soreng" authorityYear="2020" baseAuthorityName="Sylvester & Soreng" baseAuthorityYear="2020" class="Liliopsida" family="Poaceae" genus="Podagrostis" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="Podagrostis exserta" order="Poales" pageId="0" pageNumber="21" phylum="Tracheophyta" rank="species" species="exserta">
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<emphasis italics="true" pageId="0" pageNumber="21">Podagrostis exserta</emphasis>
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</taxonomicName>
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.
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<emphasis bold="true" pageId="0" pageNumber="21">A</emphasis>
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Whole plant
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<emphasis bold="true" pageId="0" pageNumber="21">B</emphasis>
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Spikelets, the upper glume of the left-hand spikelet has been removed to reveal the rachilla prolongation (indicated with a red arrow)
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<emphasis bold="true" pageId="0" pageNumber="21">C</emphasis>
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leaf blade adaxial view, showing scabers on the adaxial surface and smooth abaxial surface of the leaf blade.
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<emphasis bold="true" pageId="0" pageNumber="21">A</emphasis>
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Digitized image of specimen J.H. Beaman 3873 (US01247246) courtesy of United States National Herbarium (US)
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<emphasis bold="true" pageId="0" pageNumber="21">B, C</emphasis>
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images of specimen G.L. Webster 11826 (US3336153).
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</paragraph>
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</caption>
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</subSubSection>
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<subSubSection pageId="0" pageNumber="21" type="description">
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<paragraph pageId="0" pageNumber="21">Description.</paragraph>
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<paragraph pageId="0" pageNumber="21">
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<taxonomicName genus="Tufted" lsidName="Tufted perennial" pageId="0" pageNumber="21" rank="species" species="perennial">
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<emphasis bold="true" italics="true" pageId="0" pageNumber="21">Tufted perennial</emphasis>
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</taxonomicName>
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forming short dense tufts, with the basal mats reaching c. 3-6 cm tall and inflorescences usually well-exserted from the basal foliage.
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<emphasis bold="true" italics="true" pageId="0" pageNumber="21">Tillers</emphasis>
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intravaginal.
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<emphasis bold="true" italics="true" pageId="0" pageNumber="21">Culms</emphasis>
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5-15(-30) cm tall, erect, simple, delicate;
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<emphasis bold="true" italics="true" pageId="0" pageNumber="21">nodes and internodes</emphasis>
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terete, smooth, nodes usually hidden in the sheaths with 0(-1) nodes exposed at flowering, uppermost internode usually <1 cm long (to 4 cm long in Steyermark 50216), usually not longer than the sheath.
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<emphasis bold="true" italics="true" pageId="0" pageNumber="21">Leaves</emphasis>
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generally basal;
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<emphasis bold="true" italics="true" pageId="0" pageNumber="21">sheaths</emphasis>
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terete, glabrous, smooth; flag sheath 2-5.6 cm long; basal sheaths 0.5-1.5 cm long, striate, becoming fibrous;
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<emphasis bold="true" italics="true" pageId="0" pageNumber="21">ligules</emphasis>
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0.8-2(-2.5) mm long, membranaceous, slightly to usually strongly decurrent with the sheath; upper culm ligules acute with a obtuse to truncate apex, usually slightly erose towards the apex; ligules of tillers similar to those of the culm;
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<emphasis bold="true" italics="true" pageId="0" pageNumber="21">blades</emphasis>
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1-4(-5.5) cm long, 0.3-0.4(-0.6) mm wide in diameter, involute or convolute, acicular to capillaceous and filiform, usually curved, abaxial surfaces glabrous, smooth, adaxial surfaces glabrous, lightly to usually densely scabrous with scabers usually short, less often long and robust, edges smooth to lightly scabrous with very short hooks.
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<emphasis bold="true" italics="true" pageId="0" pageNumber="21">Panicles</emphasis>
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(1.2-)2-5
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<normalizedToken originalValue="×">x</normalizedToken>
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(0.5-)1-2.5 cm, open to slightly congested when young, usually ovoid;
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<emphasis bold="true" italics="true" pageId="0" pageNumber="21">panicle branches</emphasis>
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ascendant to patent, branched above the middle, filiform, with spikelets not present near the base, glabrous, smooth, longest branches 0.3-2 cm long;
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<emphasis bold="true" italics="true" pageId="0" pageNumber="21">pedicels</emphasis>
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(1-)1.5-5 mm long, usually longer than the length of the spikelets, divaricate, glabrous, smooth.
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<emphasis bold="true" italics="true" pageId="0" pageNumber="21">Spikelets</emphasis>
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(1.2-)1.5-2 mm long;
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<emphasis bold="true" italics="true" pageId="0" pageNumber="21">glumes</emphasis>
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remaining on the inflorescence at maturity, equal or subequal, the lower usually slightly longer than the upper, subequaling the length of the floret or slightly longer, oblong-lanceolate, slightly keeled, apex broadly acute, glabrous, keels lightly scaberulous just in the distal 1/3, surfaces smooth; lower glume 1- or 3-veined; upper glume 1- or 3-veined;
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<emphasis bold="true" italics="true" pageId="0" pageNumber="21">lemmas</emphasis>
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(1.1-)1.4-1.6 mm long, glabrous, smooth, faintly to strongly 5-veined, apex obtuse, awn lacking or to 0.5 mm long, straight, inserted medially or in the upper 1/3;
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<emphasis bold="true" italics="true" pageId="0" pageNumber="21">paleas</emphasis>
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0.9-1.3 mm long, notable, usually reaching from
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<normalizedToken originalValue="¾">3/4</normalizedToken>
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to subequaling the lemma, infrequently reaching 2/3 the length of the lemma, keels usually obscure, smooth, apex bifid and erose;
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<emphasis bold="true" italics="true" pageId="0" pageNumber="21">rachilla</emphasis>
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0.3-0.5 mm long, prolonged from the base of the floret (sometimes lacking in a small number of spikelets within the inflorescence), glabrous, smooth or scabrous.
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<emphasis bold="true" italics="true" pageId="0" pageNumber="21">Calluses</emphasis>
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0.1-0.2 mm long, slightly elongated, glabrous, smooth.
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<emphasis bold="true" italics="true" pageId="0" pageNumber="21">Flowers; lodicules</emphasis>
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c. 0.5 mm long, lanceolate with acute apices, not lobed;
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<emphasis bold="true" pageId="0" pageNumber="21">anthers</emphasis>
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3 in number, 0.7-1.1 mm long.
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<emphasis bold="true" italics="true" pageId="0" pageNumber="21">Caryopses</emphasis>
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not seen. 2
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<emphasis italics="true" pageId="0" pageNumber="21">n</emphasis>
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= unknown.
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</paragraph>
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</subSubSection>
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<subSubSection pageId="0" pageNumber="21" type="distribution">
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<paragraph pageId="0" pageNumber="21">Distribution and ecology.</paragraph>
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<paragraph pageId="0" pageNumber="21">Guatemala, endemic. Grows in alpine grasslands on volcanic soils, 2900-3700 m.</paragraph>
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</subSubSection>
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<subSubSection pageId="0" pageNumber="21" type="materials_examined">
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<paragraph pageId="0" pageNumber="21">Additional specimens examined.</paragraph>
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<paragraph pageId="0" pageNumber="21">
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Guatemala.
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<emphasis bold="true" pageId="0" pageNumber="21">Huehuetenango</emphasis>
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: Sierra de los Cuchumatanes, alpine areas in vicinity of Tunima, 3400-3500 m alt., 7 July 1942, J.A. Steyermark 48321 (US1914763; US2208640); Sierra de los Cuchumatanes, between Tojiah and Chemal at km 319.5 on Ruta Nacional 9N, 3380 m alt., 31 July 1960, J.H. Beaman 3873 (US01247246); Sierra de los Cuchumatanes, between Tojquia and Caxin bluff, summit of Sierra de los Cuchumatanes, 3700 m alt., 6 Aug. 1942, J.A. Steyermark 50216 (US2181354).
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<emphasis bold="true" pageId="0" pageNumber="21">Solola</emphasis>
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: Woods 11 miles SE of Totonicapan, 3200 m alt., 27 June 1962, G.L. Webster 11826 (US3336153).
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<emphasis bold="true" pageId="0" pageNumber="21">Totonicapan</emphasis>
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: Desconsuelo, potrero natual, 3100 m alt., Aug. 1954, M. de Koninck 201 (US2153266); On the Tecum Uman Ridge at km 154 on Ruta Nacional No. 1, ca. 20km east of Totonicapan, 3340 m alt., 13 Aug. 1960, J.H. Beaman 4154 (US2381726).
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</paragraph>
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</subSubSection>
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<subSubSection pageId="0" pageNumber="21" type="notes">
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<paragraph pageId="0" pageNumber="21">Notes.</paragraph>
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<paragraph pageId="0" pageNumber="21">
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Similar in general habit to
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<taxonomicName lsidName="P. trichodes" pageId="0" pageNumber="21" rank="species" species="trichodes">
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<emphasis italics="true" pageId="0" pageNumber="21">P. trichodes</emphasis>
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</taxonomicName>
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(see notes under this species for how to distinguish them).
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<taxonomicName authorityName="Sylvester & Soreng" authorityYear="2020" baseAuthorityName="Sylvester & Soreng" baseAuthorityYear="2020" class="Liliopsida" family="Poaceae" genus="Podagrostis" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="Podagrostis bacillata" order="Poales" pageId="0" pageNumber="21" phylum="Tracheophyta" rank="species" species="bacillata">
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<emphasis italics="true" pageId="0" pageNumber="21">Podagrostis bacillata</emphasis>
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</taxonomicName>
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also has smooth panicle branches and pedicels and bears very similar spikelet characteristics to
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<taxonomicName lsidName="P. exserta" pageId="0" pageNumber="21" rank="species" species="exserta">
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<emphasis italics="true" pageId="0" pageNumber="21">P. exserta</emphasis>
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</taxonomicName>
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, with both having spikelets usually measuring> 1.5 mm long, with smooth glumes apart from the keel being lightly scaberulous, and smooth lemmas.
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<taxonomicName authorityName="Sylvester & Soreng" authorityYear="2020" baseAuthorityName="Sylvester & Soreng" baseAuthorityYear="2020" class="Liliopsida" family="Poaceae" genus="Podagrostis" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="Podagrostis bacillata" order="Poales" pageId="0" pageNumber="21" phylum="Tracheophyta" rank="species" species="bacillata">
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<emphasis italics="true" pageId="0" pageNumber="21">Podagrostis bacillata</emphasis>
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</taxonomicName>
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can be distinguished from
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<taxonomicName lsidName="P. exserta" pageId="0" pageNumber="21" rank="species" species="exserta">
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<emphasis italics="true" pageId="0" pageNumber="21">P. exserta</emphasis>
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</taxonomicName>
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principally by the culms having at least one visible elongated internode, 4-13 cm long, with usually at least one node exserted from the sheaths (vs. usually no visible elongated internodes or nodes, with the distalmost internode usually <1 cm long in
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<taxonomicName lsidName="P. exserta" pageId="0" pageNumber="21" rank="species" species="exserta">
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<emphasis italics="true" pageId="0" pageNumber="21">P. exserta</emphasis>
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</taxonomicName>
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), leaf blade abaxial surface lightly to usually densely scabrous (vs. smooth in
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<taxonomicName lsidName="P. exserta" pageId="0" pageNumber="21" rank="species" species="exserta">
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<emphasis italics="true" pageId="0" pageNumber="21">P. exserta</emphasis>
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</taxonomicName>
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), leaf blades usually longer, 2-15 cm long, forming a basal mat reaching c. 6-17 cm tall (vs. usually <4 cm long, forming a basal mat reaching c. 3-6 cm tall in
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<taxonomicName lsidName="P. exserta" pageId="0" pageNumber="21" rank="species" species="exserta">
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<emphasis italics="true" pageId="0" pageNumber="21">P. exserta</emphasis>
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</taxonomicName>
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), ligules 1.7-4.3 mm long (vs. 0.8-2.5 mm long in
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<taxonomicName lsidName="P. exserta" pageId="0" pageNumber="21" rank="species" species="exserta">
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<emphasis italics="true" pageId="0" pageNumber="21">P. exserta</emphasis>
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</taxonomicName>
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), and a rachilla prolongation 0.3-1.4 mm long (vs. 0.3-0.5 mm long in
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<taxonomicName lsidName="P. exserta" pageId="0" pageNumber="21" rank="species" species="exserta">
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<emphasis italics="true" pageId="0" pageNumber="21">P. exserta</emphasis>
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</taxonomicName>
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), (also see notes under
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<taxonomicName lsidName="P. bacillata" pageId="0" pageNumber="21" rank="species" species="bacillata">
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<emphasis italics="true" pageId="0" pageNumber="21">P. bacillata</emphasis>
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</taxonomicName>
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). However, one specimen (Steyermark 50216) did have a moderately long internode at c. 4 cm long, as well as slightly longer leaf blades to 5.5 cm long, but could be differentiated based on the short ligules, <1.4 mm long, short panicles <3 cm long, and, crucially, the leaf blade abaxial surface being smooth, with scabers only present on the adaxial surface.
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</paragraph>
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<paragraph pageId="0" pageNumber="21">
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The possible affinity of
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<taxonomicName lsidName="A. exserta" pageId="0" pageNumber="21" rank="species" species="exserta">
|
||
<emphasis italics="true" pageId="0" pageNumber="21">A. exserta</emphasis>
|
||
</taxonomicName>
|
||
to
|
||
<taxonomicName class="Liliopsida" family="Poaceae" genus="Podagrostis" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="Podagrostis" order="Poales" pageId="0" pageNumber="21" phylum="Tracheophyta" rank="genus">
|
||
<emphasis italics="true" pageId="0" pageNumber="21">Podagrostis</emphasis>
|
||
</taxonomicName>
|
||
was mentioned previously (
|
||
<bibRefCitation author="Pohl, RW" editor="Davidse, G" journalOrPublisher="Universidad Nacional Autonoma de Mexico, Mexico, D. F." pageId="0" pageNumber="21" pagination="237 - 240" refId="B21" refString="Pohl, RW, Davidse, G, 1994. 46. Agrostis L. In: Davidse, G, Sousa, M, Sanchez, MS, Chater, AO, Eds., Flora Mesoamericana, vol 6 Alismataceae a Cyperaceae. Universidad Nacional Autonoma de Mexico, Mexico, D. F.: 237 - 240" title="46. Agrostis L." volumeTitle="Flora Mesoamericana, vol 6 Alismataceae a Cyperaceae." year="1994">Pohl and Davidse 1994</bibRefCitation>
|
||
;
|
||
<bibRefCitation author="Briceno, B" editor="Morillo, GN" journalOrPublisher="2. Centro Editorial Litoramma C. A., Merida" pageId="0" pageNumber="21" pagination="599 - 711" refId="B2" refString="Briceno, B, 2010. Capitulo XXI Familia Poaceae (R.Br.) Barnhart (Gramineae). In: Morillo, GN, Briceno, B, Silva, JF, Eds., Botanica y Ecologia de las Monocotiledoneas de los Paramos en Venezuela, vol. 2. Centro Editorial Litoramma C. A., Merida: 599 - 711" title="Capitulo XXI Familia Poaceae (R. Br.) Barnhart (Gramineae)." volumeTitle="Botanica y Ecologia de las Monocotiledoneas de los Paramos en Venezuela, vol." year="2010">
|
||
<normalizedToken originalValue="Briceño">Briceno</normalizedToken>
|
||
2010
|
||
</bibRefCitation>
|
||
), with
|
||
<bibRefCitation author="Pohl, RW" editor="Davidse, G" journalOrPublisher="Universidad Nacional Autonoma de Mexico, Mexico, D. F." pageId="0" pageNumber="21" pagination="237 - 240" refId="B21" refString="Pohl, RW, Davidse, G, 1994. 46. Agrostis L. In: Davidse, G, Sousa, M, Sanchez, MS, Chater, AO, Eds., Flora Mesoamericana, vol 6 Alismataceae a Cyperaceae. Universidad Nacional Autonoma de Mexico, Mexico, D. F.: 237 - 240" title="46. Agrostis L." volumeTitle="Flora Mesoamericana, vol 6 Alismataceae a Cyperaceae." year="1994">Pohl and Davidse (1994)</bibRefCitation>
|
||
recommending transfer of
|
||
<taxonomicName lsidName="A. exserta" pageId="0" pageNumber="21" rank="species" species="exserta">
|
||
<emphasis italics="true" pageId="0" pageNumber="21">A. exserta</emphasis>
|
||
</taxonomicName>
|
||
to
|
||
<taxonomicName class="Liliopsida" family="Poaceae" genus="Podagrostis" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="Podagrostis" order="Poales" pageId="0" pageNumber="21" phylum="Tracheophyta" rank="genus">
|
||
<emphasis italics="true" pageId="0" pageNumber="21">Podagrostis</emphasis>
|
||
</taxonomicName>
|
||
. Despite repeated efforts by different researchers (e.g. P. Barbera, Y. Herrera, P.M. Peterson, J. R Reichman, K. Romaschenko, L.S. Watrud, pers. comm.) to sequence leaf samples from herbarium specimens of this species, none have been successful to date largely due to the available specimens having mostly aged, brownish leaves. This may be a characteristic of the species in general, with only new fresh shoots being found very early in the growing season and becoming brown at maturity. Successful molecular sampling of this species is necessary.
|
||
</paragraph>
|
||
</subSubSection>
|
||
</treatment>
|
||
</document> |