View source for Calamagrostis sesquiflora

{{Treatment/ID
|accepted_name=Calamagrostis sesquiflora
|accepted_authority=(Trin.) Tzvelev
|publications=
|common_names=One-and-a-half-flowered reedgrass
|basionyms=
|synonyms={{Treatment/ID/Synonym
|name=Calamagrostis purpurascens subsp. tasuensis
|authority=
|rank=subspecies
}} {{Treatment/ID/Synonym
|name=Calamagrostis purpurascens subsp. arctica
|authority=
|rank=subspecies
}} {{Treatment/ID/Synonym
|name=Calamagrostis arctica
|authority=
|rank=species
}}
|hierarchy=Poaceae;Poaceae subfam. Pooideae;Poaceae tribe Poeae;Calamagrostis;Calamagrostis sesquiflora
|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 Poeae]]</div><div class="higher-taxon"><small>genus</small>[[Calamagrostis]]</div><div class="higher-taxon"><small>species</small>[[Calamagrostis sesquiflora]]</div></div>
|volume=Volume 24
|mention_page=
|treatment_page=page 714
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>rarely with sterile culms; strongly cespitose, usually without rhizomes, sometimes with rhizomes 1-2 cm long, 1-2 mm thick. <b>Culms</b> (15)30-46(50) cm, unbranched, usually smooth, rarely slightly scabrous beneath the panicles; nodes 1-2(3). <b>Sheaths</b> and collars smooth; ligules (0.5)2-5(6) mm, usually truncate, sometimes obtuse, usually entire, sometimes lacerate; blades (3)8-25(31) cm long, (2)3-7 mm wide, flat, abaxial surfaces usually scabrous, rarely smooth, adaxial surfaces smooth or slightly scabrous, glabrous or sparsely hairy. <b>Panicles</b> 4-11(12) cm long, 0.8-2.5(2.8) cm wide, erect, contracted to somewhat open, usually purple-tinged, sometimes brown or green; branches 1.5-3(4) cm, scabrous, prickles sometimes almost hairlike, usually spikelet-bearing to the base, lowest branches sometimes not so. <b>Spikelets</b> (5)5.5-8.5(9.5) mm; rachilla prolongations (1)1.5(2.2) mm, hairs 1-2.2 mm. <b>Glumes</b> keeled, keels usually scabrous for their whole length, sometimes the surfaces also scabrous, lateral veins prominent, apices long-acuminate, usually twisted distally; callus hairs (0.8)1.2-1.8(3) mm, 0.1-0.4 times as long as the lemmas, abundant; lemmas (3.5)4-4.5(6) mm, (0.5)1-2.5(4.5) mm shorter than the glumes; awns (5.4)7-11(13) mm, attached to the lower 1/10 – 2/5 of the lemmas, exserted more than 2 mm, stout, easily distinguished from the callus hairs, bent; anthers (1.2)2.2-3(3.4) mm. <b>2n</b> = 28.</span><!--

-->{{Treatment/Body
|distribution=Alaska;Wash.;Oreg.;B.C.
|discussion=<p><i>Calamagrostis sesquiflora</i> grows at 0-1000 m in open heath, meadows, and forest openings, on or at the base of open rocky cliffs and knolls, as well as in moist talus. It grows in strictly maritime habitats along the west coast of North America, from the Aleutian Islands in Alaska to the Queen Charlotte Islands and south to Vancouver Island (Brooks Peninsula) in British Columbia. There is also a single collection from the coast of mainland British Columbia. In northeast Asia, it ranges into the Kamchatka Peninsula and Kuril Archipelago.</p><!--
--><p>Some specimens from the northwestern United States are incorrectly identified, partly because an earlier name for <i>Trisetum spicatum</i> (L.) K. Richt. was <i>Trisetum</i> sesquiflorum Trin.</p><!--
--><p><i>Calamagrostis sesquiflora</i> has sometimes included <i>C. tacomensis</i> (see next) [as <i>C. vaseyi</i> Beal]. Several specimens that were previously identified as <i>C. sesquiflora</i> are actually <i>C. tacomensis</i>. <i>Calamagrostis sesquiflora</i> differs in preferring moister habitats, having wider leaves, callus hairs that are shorter relative to the lemmas, shorter panicle branches, and glumes that are often twisted at the apices.</p>
|tables=
|references=
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-->{{#Taxon:
name=Calamagrostis sesquiflora
|authority=(Trin.) Tzvelev
|rank=species
|parent rank=genus
|synonyms=Calamagrostis purpurascens subsp. tasuensis;Calamagrostis purpurascens subsp. arctica;Calamagrostis arctica
|basionyms=
|family=Poaceae
|illustrator=Cindy Roché;Hana Pazdírková
|illustration copyright=Utah State University
|distribution=Alaska;Wash.;Oreg.;B.C.
|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_1008.xml
|subfamily=Poaceae subfam. Pooideae
|tribe=Poaceae tribe Poeae
|genus=Calamagrostis
|species=Calamagrostis sesquiflora
}}<!--

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