View source for Poa secunda subsp. secunda

{{Treatment/ID
|accepted_name=Poa secunda subsp. secunda
|accepted_authority=
|publications=
|common_names=Pacific bluegrass;Pine bluegrass;Sandberg bluegrass;Canby bluegrass
|basionyms=
|synonyms={{Treatment/ID/Synonym
|name=Poa secunda var. stenophylla
|authority=
|rank=variety
}} {{Treatment/ID/Synonym
|name=Poa secunda var. incurva
|authority=
|rank=variety
}} {{Treatment/ID/Synonym
|name=Poa secunda var. elongata
|authority=
|rank=variety
}} {{Treatment/ID/Synonym
|name=Poa scabrella
|authority=
|rank=species
}} {{Treatment/ID/Synonym
|name=Poa sandbergii
|authority=
|rank=species
}} {{Treatment/ID/Synonym
|name=Poa incurva
|authority=
|rank=species
}} {{Treatment/ID/Synonym
|name=Poa gracillima
|authority=
|rank=species
}}
|hierarchy=Poaceae;Poaceae subfam. Pooideae;Poaceae tribe Poeae;Poa;Poa subg. Poa;Poa sect. Secundae;Poa subsect. Secundae;Poa secunda;Poa secunda subsp. secunda
|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>[[Poa]]</div><div class="higher-taxon"><small>subgenus</small>[[Poa subg. Poa]]</div><div class="higher-taxon"><small>section</small>[[Poa sect. Secundae]]</div><div class="higher-taxon"><small>subsection</small>[[Poa subsect. Secundae]]</div><div class="higher-taxon"><small>species</small>[[Poa secunda]]</div><div class="higher-taxon"><small>subspecies</small>[[Poa secunda subsp. secunda]]</div></div>
|volume=Volume 24
|mention_page=
|treatment_page=page 588
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Basal </b>leaf tufts usually tiny to medium, less often robust. <b>Basal</b> branching mixed intra- and extravaginal or mainly intravaginal. <b>Culms</b> (10) 15-100 cm, slender to middling. <b>Ligules</b> of culm leaves 2-6(10) mm, those of the innovations mostly 2-6 mm, smooth or scabrous, obtuse to acuminate; blades 0.4-3 mm, usually thin, lax, and soon withering, sometimes moderately thick, moderately firm, and somewhat persistent. <b>Panicles</b> 2-15(20) cm, usually narrowly lanceoloid to ovoid, contracted at maturity and congested, or occasionally pyramidal, open at maturity, and sparse; branches erect or ascending, infrequently widely spreading at maturity. <b>Spikelets</b> (4)5-8 mm; calluses glabrous or pubescent; lemmas with keels and marginal veins long-villous, crisply puberulent, or softly puberulent over the basal 2/3, intercostal regions usually at least sparsely crisply or softly puberulent, hairs usually shorter than 0.5 mm; palea keels short-villous to softly puberulent at midlength, intercostal regions often softly puberulent. <b>2n</b> = 42, 44+f, ca. 48, 56, ca. 62, 63, ca. 66, ca. 68, 70, ca. 72, ca. 74, ca. 78, ca. 80, 81, 82, ca. 83, 84, ca. 86, ca. 87, ca. 88, ca. 90, ca. 91, 93, ca. 94, ca. 98, ca. 99, 100, 104, 105-106.</span><!--

-->{{Treatment/Body
|discussion=<p><i>Poa secunda </i>subsp.<i> secunda</i> comprises several forms or ecotypes which intergrade morphologically and overlap geographically. Its chromosome numbers are centered on 2n = 84. It generally grows in more xeric habitats than <i></i>subsp.<i> juncifolia</i>; it is also common in alpine habitats. Some of the major variants, and the names that have been applied to them, are: scabrous plants, primarily from west of the Cascade/Sierra <i>Nevada</i> axis (P. scabrella (Thurb.) Benth. ex Vasey, Pine Bluegrass); smoother, large plants extending eastward (<i>P. canbyi</i> (Scribn.) Howell, Canby Bluegrass); tiny, early–spring-flowering plants of stony and mossy-ground (P. sandbergii Vasey, Sandberg Bluegrass); and slender, sparse plants, generally of mesic shady habitats, with panicles that remain open (<i>P. gracillima</i> Vasey, Pacific Bluegrass). Alpine plants have been called <i>P. incurva</i> Scribn. & T.A. Williams.</p><!--
--><p><i>Poa secunda </i>subsp.<i> secunda</i> can be difficult to separate from <i>P. stenantha </i>var.<i> stenantha</i> (p. 574). It differs in having more rounded lemma keels, hairs between the veins of the lemmas, and calluses that are glabrous or have hairs shorter than 0.2 mm. It also resembles <i>P. tenerrima</i> (see next), but lacks that species' combination of persistently wide, open panicles, very scabrous branches, short-truncate ligules, and very fine foliage.</p>
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-->{{#Taxon:
name=Poa secunda subsp. secunda
|authority=
|rank=subspecies
|parent rank=species
|synonyms=Poa secunda var. stenophylla;Poa secunda var. incurva;Poa secunda var. elongata;Poa scabrella;Poa sandbergii;Poa incurva;Poa gracillima
|basionyms=
|family=Poaceae
|illustrator=Sandy Long
|illustration copyright=Utah State University
|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_826.xml
|subfamily=Poaceae subfam. Pooideae
|tribe=Poaceae tribe Poeae
|genus=Poa
|subgenus=Poa subg. Poa
|section=Poa sect. Secundae
|subsection=Poa subsect. Secundae
|species=Poa secunda
|subspecies=Poa secunda subsp. secunda
}}<!--

-->[[Category:Treatment]][[Category:Poa secunda]]