View source for Elymus riparius

{{Treatment/ID
|accepted_name=Elymus riparius
|accepted_authority=Wiegand
|publications=
|common_names=Eastern riverbank wildrye;Élyme des rivages
|special_status={{Treatment/ID/Special_status
|code=E
|label=Endemic
}}
|basionyms=
|synonyms=
|hierarchy=Poaceae;Poaceae subfam. Pooideae;Poaceae tribe Triticeae;Elymus;Elymus riparius
|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 Triticeae]]</div><div class="higher-taxon"><small>genus</small>[[Elymus]]</div><div class="higher-taxon"><small>species</small>[[Elymus riparius]]</div></div>
|volume=Volume 24
|mention_page=
|treatment_page=page 302
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>cespitose, not rhizomatous, often somewhat glaucous. <b>Culms</b> 70-160 cm, erect, sometimes rooting at the lower nodes; nodes 5-10, mostly concealed, glabrous. <b>Leaves</b> evenly distributed; sheaths usually glabrous or scabridulous, often reddish brown; auricles absent or to 2 mm, brown; ligules shorter than 1 mm; blades (5)8-15(25) mm wide, flat, lax, dull green, drying to grayish, adaxial surfaces glabrous or scabrous. <b>Spikes</b> 7-25 cm long, 2-4 cm wide, nodding, exserted, usually with 2 spikelets per node, rarely with 3 at some nodes; internodes 3-5(8) mm long, 0.2-0.35 thick at the thinnest sections, usually glabrous below the spikelets. <b>Spikelets</b> 10-20 mm, strongly divergent, with 2-3(4) florets, lowest florets functional; disarticulation above the glumes and beneath each floret. <b>Glumes</b> equal or subequal, 14-30 mm including the sometimes undifferentiated awn, the basal 0.5-2 mm terete, indurate, straight or nearly so, veins not evident, glume bodies 9-17 mm long, (0.3)0.5-0.8(1) mm wide, linear-setiform, entire, widening or parallel-sided above the base, 2-3(4)-veined, usually hispidulous or scabrous, rarely glabrous, margins firm, awns (5)8-18 mm, straight; lemmas 7-14 mm, usually hispidulous, sometimes scabrous, awns 15-35 mm, usually straight, those of the basal spikelets occasionally contorted; paleas 6-9 mm, usually acute, sometimes obtuse to truncate, bidentate; anthers 2-2.7 mm. <b>Anthesis</b> late June to late July. <b>2n</b> = 28.</span><!--

-->{{Treatment/Body
|distribution=W.Va.;Del.;D.C.;Wis.;Ont.;Que.;Ky.;Minn.;Fla.;N.H.;N.J.;N.C.;Tenn.;N.Y.;Pa.;R.I.;Va.;Conn.;Mass.;Maine;Vt.;Ark.;Ill.;Ga.;Ind.;Iowa;Md.;Ohio;Mo.;Mich.;Miss.;S.C.
|discussion=<p><i>Elymus riparius</i> grows in moist, usually alluvial and often sandy soils in woods and thickets, usually along larger streams and occasionally along upland ditches. It is widespread in most of temperate east-central North America. It is rare in southern Ontario and Quebec, and the eastern Great Plains. It is virtually absent from the southeastern coastal plain.</p><!--
--><p><i>Elymus riparius</i> is relatively uniform and distinct. It is sometimes confused with <i>E. canadensis</i> (see next), but that species has curving awns. It hybridizes occasionally with several other taxa, especially <i>E. virginicus </i>var.<i> virginicus</i> (p. 300) and <i>E. hystrix</i> (p. 316), but the hybrids produce only late, depauperate spikes or none at all (e.g., Church 1958).</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Elymus riparius
|authority=Wiegand
|rank=species
|parent rank=genus
|synonyms=
|basionyms=
|family=Poaceae
|illustrator=Cindy Roché;Annaliese Miller
|illustration copyright=Utah State University
|distribution=W.Va.;Del.;D.C.;Wis.;Ont.;Que.;Ky.;Minn.;Fla.;N.H.;N.J.;N.C.;Tenn.;N.Y.;Pa.;R.I.;Va.;Conn.;Mass.;Maine;Vt.;Ark.;Ill.;Ga.;Ind.;Iowa;Md.;Ohio;Mo.;Mich.;Miss.;S.C.
|reference=None
|publication title=
|publication year=
|special status=Endemic
|source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V24/V24_425.xml
|subfamily=Poaceae subfam. Pooideae
|tribe=Poaceae tribe Triticeae
|genus=Elymus
|species=Elymus riparius
}}<!--

-->[[Category:Treatment]][[Category:Elymus]]