View source for Deschampsia cespitosa subsp. cespitosa

{{Treatment/ID
|accepted_name=Deschampsia cespitosa subsp. cespitosa
|accepted_authority=
|publications=
|common_names=Tufted hairgrass;Deschampsie cespiteuse
|basionyms=
|synonyms={{Treatment/ID/Synonym
|name=Deschampsia caespitosa var. glauca
|authority=
|rank=variety
}}
|hierarchy=Poaceae;Poaceae subfam. Pooideae;Poaceae tribe Poeae;Deschampsia;Deschampsia cespitosa;Deschampsia cespitosa subsp. cespitosa
|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>[[Deschampsia]]</div><div class="higher-taxon"><small>species</small>[[Deschampsia cespitosa]]</div><div class="higher-taxon"><small>subspecies</small>[[Deschampsia cespitosa subsp. cespitosa]]</div></div>
|volume=Volume 24
|mention_page=
|treatment_page=page 628
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>densely cespitose, not glaucous. <b>Culms</b> (7)35-150 cm. <b>Ligules</b> 2-8 mm; blades 5-25 cm long, 1.5-3.5 mm wide when flat. <b>Panicles</b> 8-30 cm long, 4-30 cm wide, open, nodding, pyramidal; branches, both primary and secondary, usually divergent, usually sparsely to moderately scabridulous or scabrous, sometimes smooth. <b>Spikelets</b> 2.5-7 mm, not to slightly imbricate. <b>Glumes</b> subequal to the distal floret, lengths often less than 5 times widths; lower glumes 2.5-5 mm, midveins smooth or scabridulous distally; upper glumes 2-6 mm; lemmas 2-4 mm, purple and/or green proximally, green to gold distally, the purple portion usually less than 1/2 the surface area, awns 1-8 mm, usually attached near the base, sometimes attached near midlength, straight or geniculate, exceeded by or exceeding the distal floret; anthers 1.5-2 mm.</span><!--

-->{{Treatment/Body
|discussion=<p><i>Deschampsia cespitosa </i>subsp.<i> cespitosa</i> is treated here as a circumboreal taxon that is most prevalent in boreal and temperate North America, growing at 0-3000 m; many reports from arctic and alpine North America refer to what are treated here as <i>D. sukatschewii</i> or <i>D. brevifolia</i>. Even with this narrower interpretation, <i>D. cespitosa</i> is highly polymorphic. Plants with long awns are more prevalent in western North America but, within that region, do not appear to show any geographic or ecological preference (Lawrence 1945). Larger plants are difficult to distinguish from <i>D. cespitosa </i>subsp.<i> beringensis</i>. The morphological, geographic, and ecological boundaries between <i>D. cespitosa </i>subsp.<i> cespitosa</i> and <i></i>subsp.<i> beringensis</i> need further study.</p><!--
--><p>Many cultivars of <i>Deschampsia cespitosa </i>subsp.<i> cespitosa</i> have been developed. At one time, the most frequently cultivated plants were distinguished by their combination of large (20-40 cm) panicles and small (2.5-4 mm) spikelets, and were called <i>D. cespitosa</i> <i></i>var.<i> parviflora</i> (Thuill.) Coss. & Germ, or <i>D. cespitosa</i> <i></i>subsp.<i> parviflora</i> (Thuill.) K. Richt. Such plants are treated here as one part of the spectrum of variation in <i></i>subsp.<i> cespitosa</i>.</p><!--
--><p>The name <i>Deschampsia cespitosa</i> <i></i>var.<i> glauca</i> (Hartm.) Lindm. has been applied in eastern North America to glaucous plants less than 75 cm tall, with spikelets only 3-4.5 mm long. Unfortunately, the name is illegitimate; there is no legitimate name available for such plants.</p>
|tables=
|references=
}}<!--

--><!--

-->{{#Taxon:
name=Deschampsia cespitosa subsp. cespitosa
|authority=
|rank=subspecies
|parent rank=species
|synonyms=Deschampsia caespitosa var. glauca
|basionyms=
|family=Poaceae
|illustrator=Cindy Roché
|illustration copyright=Utah State University
|reference=None
|publication title=
|publication year=
|special status=
|source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-data-curation.git/src/bb6b7e3a7de7d3b7888a1ad48c7fd8f5c722d8d6/coarse_grained_fna_xml/V24/V24_894.xml
|subfamily=Poaceae subfam. Pooideae
|tribe=Poaceae tribe Poeae
|genus=Deschampsia
|species=Deschampsia cespitosa
|subspecies=Deschampsia cespitosa subsp. cespitosa
}}<!--

-->[[Category:Treatment]][[Category:Deschampsia cespitosa]]