View source for Nassella viridula

{{Treatment/ID
|accepted_name=Nassella viridula
|accepted_authority=(Trin.) Barkworth
|publications=
|common_names=Green nassella;Green needlegrass
|basionyms=
|synonyms={{Treatment/ID/Synonym
|name=Stipa viridula
|authority=
|rank=species
}}
|hierarchy=Poaceae;Poaceae subfam. Pooideae;Poaceae tribe Stipeae;Nassella;Nassella viridula
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Poaceae]]</div><div class="higher-taxon"><small>subfamily</small>[[Poaceae subfam. Pooideae]]</div><div class="higher-taxon"><small>tribe</small>[[Poaceae tribe Stipeae]]</div><div class="higher-taxon"><small>genus</small>[[Nassella]]</div><div class="higher-taxon"><small>species</small>[[Nassella viridula]]</div></div>
|volume=Volume 24
|mention_page=
|treatment_page=page 177
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>perennial; cespitose, not rhizomatous. <b>Culms</b> 35-120 cm, erect or geniculate basally, internodes mostly glabrous, pubescent below the lower nodes; nodes 2-3, glabrous. <b>Sheaths</b> mostly glabrous, margins usually ciliate; collars of basal leaves hispidulous, with tufts of hair at the sides, hairs 0.5-1.8 mm, collars of flag leaves glabrous or sparsely pubescent; ligules 0.2-1.2 mm, glabrous, truncate to rounded; blades 10-30 cm long; 1.5-3 mm wide, flat to convolute, abaxial surfaces scabridulous, glabrous, adaxial surfaces glabrous. <b>Panicles</b> 2.9-7.2 cm, loosely contracted; branches 1-4 cm, appressed or ascending, with 3-7 spikelets; pedicels 1-9 mm. <b>Glumes</b> subequal, 6.8-13 mm long, 1-2.1 mm wide, narrowly lanceolate, glabrous, apiculate; florets 3.4-5.5 mm long, 1-1.2 mm wide, terete; calluses 0.7-1.4 mm, moderately sharp, strigose; lemmas papillose, evenly pubescent, not constricted below the crown; crowns 0.4-0.5 mm long, 0.3-0.5 mm wide, not conspicuous, straight-sided, rims with 0.5-0.75 mm hairs; awns 19-32 mm, evidently twice-geniculate, terminal segment straight; anthers (0.8)2-3 mm, sometimes penicillate. <b>Caryopses</b> about 3.5 mm. <b>2n</b> = 82, 88.</span><!--

-->{{Treatment/Body
|distribution=Colo.;N.Mex.;Mont.;Utah;Calif.;Minn.;Wis.;Iowa;Ill.;Kans.;N.Dak.;Nebr.;S.Dak.;Alta.;B.C.;Man.;N.W.T.;Sask.;Yukon;N.Y.;Ariz.;Idaho;Wyo.
|discussion=<p><i>Nassella viridula</i> grows in grasslands and open woods, frequently on sandy soils. It is the most widespread species of <i>Nassella</i> in North America. Its morphology, distribution, and high chromosome number suggest that it may be an alloploid between <i>Nassella</i> and <i>Achnatherum</i>. It is included in <i>Nassella</i> because it resembles <i>Nassella</i> more than <i>Achnatherum</i> in the characters distinguishing the two genera. It differs from <i>Achnatherum robustum</i> in its tightly convolute lemmas and in having glabrous to sparsely pubescent collars on its flag leaves. It differs from the hybrid with <i>Achnatherum hymenoides</i>, ×Achnella caduca, in its less saccate glumes, shorter lemmas hairs, and shorter paleas.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Nassella viridula
|authority=(Trin.) Barkworth
|rank=species
|parent rank=genus
|synonyms=Stipa viridula
|basionyms=
|family=Poaceae
|illustrator=Linda Ann Vorobik
|illustration copyright=Utah State University
|distribution=Colo.;N.Mex.;Mont.;Utah;Calif.;Minn.;Wis.;Iowa;Ill.;Kans.;N.Dak.;Nebr.;S.Dak.;Alta.;B.C.;Man.;N.W.T.;Sask.;Yukon;N.Y.;Ariz.;Idaho;Wyo.
|reference=None
|publication title=
|publication year=
|special status=
|source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/200273ad09963decb8fc72550212de541d86569d/coarse_grained_fna_xml/V24/V24_244.xml
|subfamily=Poaceae subfam. Pooideae
|tribe=Poaceae tribe Stipeae
|genus=Nassella
|species=Nassella viridula
}}<!--

-->[[Category:Treatment]][[Category:Nassella]]