View source for Elymus arizonicus

{{Treatment/ID
|accepted_name=Elymus arizonicus
|accepted_authority=(Scribn. & J.G. Sm.) Gould
|publications=
|common_names=Arizona wheatgrass
|basionyms=
|synonyms={{Treatment/ID/Synonym
|name=Pseudoroegneria arizonica
|authority=unknown
}} {{Treatment/ID/Synonym
|name=Agropyron arizonicum
|authority=unknown
}}
|hierarchy=Poaceae;Poaceae subfam. Pooideae;Poaceae tribe Triticeae;Elymus;Elymus arizonicus
|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 arizonicus]]</div></div>
|volume=Volume 24
|mention_page=
|treatment_page=page 329
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>cespitose, not rhizomatous. <b>Culms</b> 45-100 cm, erect or decumbent at the base; nodes glabrous or almost so. <b>Leaves</b> evenly distributed over the lower 1/2 of the culms; sheaths glabrous; auricles usually present, to 1 mm; ligules to 1 mm on the basal leaves, 1-3 mm on the flag leaves; blades 2.5-6 mm wide, lax, abaxial surfaces smooth and glabrous, adaxial surfaces scabrous, with scattered 0.5-1 mm hairs, veins close together. <b>Spikes</b> 12-25 cm long, 2.5-6 cm wide including the awns, 10-15 mm wide excluding the awns, flexuous, usually nodding or pendent at maturity, with 1 spikelet per node; internodes 11-17 mm long, 0.4-1 mm wide, glabrous, mostly smooth, scabrous on the edges. <b>Spikelets</b> 14-26 mm long, 6-8 mm wide, appressed to divergent, 1.5-2 times as long as the internodes, with 4-6 florets; rachillas glabrous; disarticulation above the glumes and beneath each floret. <b>Glumes</b> narrowly lanceolate, margins about 0.2 mm wide, 3(5)-veined, the bases flat, evidently veined, margins hyaline, widest at about midlength, acute or acuminate, unawned or awned, awns to 4 mm, straight; lower glumes 5-9 mm; upper glumes 8-10 mm; lemmas 8-15 mm, scabrous, rounded on the back, awns 10-25 mm, arcuately diverging; paleas as long as or longer than the lemmas, tapering, apices truncate, about 0.3 mm wide; anthers 3-5 mm. <b>2n</b> = 28.</span><!--

-->{{Treatment/Body
|distribution=Calif.;Ariz.;N.Mex.;Tex.
|discussion=<p><i>Elymus arizonicus</i> grows in moist, rocky soil in mountain canyons of the southwestern United States and northern Mexico. When mature, the drooping spike and solitary spikelets make <i>E. arizonicus</i> easy to identify. Immature specimens, or those mounted so that the spike appears erect, are easily mistaken for <i>Pseudoroegneria spicata</i> (p. 281), but they have thicker culms and longer ligules, more basal leaves, and wider leaf blades.</p>
|tables=
|references=
}}<!--

--><!--

-->{{#Taxon:
name=Elymus arizonicus
|author=
|authority=(Scribn. & J.G. Sm.) Gould
|rank=species
|parent rank=genus
|synonyms=Pseudoroegneria arizonica;Agropyron arizonicum
|basionyms=
|family=Poaceae
|distribution=Calif.;Ariz.;N.Mex.;Tex.
|reference=None
|publication title=
|publication year=
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f6b125a955440c0872999024f038d74684f65921/coarse_grained_fna_xml/V24/V24_468.xml
|subfamily=Poaceae subfam. Pooideae
|tribe=Poaceae tribe Triticeae
|genus=Elymus
|species=Elymus arizonicus
}}<!--

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