View source for Cirsium eatonii var. viperinum

{{Treatment/ID
|accepted_name=Cirsium eatonii var. viperinum
|accepted_authority=D. J. Keil
|publications={{Treatment/Publication
|title=Sida
|place=21: 212. 2004
|year=2004
}}
|common_names=Snake Range thistle
|basionyms=
|synonyms=
|hierarchy=Asteraceae;Asteraceae tribe Cardueae;Cirsium;Cirsium eatonii;Cirsium eatonii var. viperinum
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Asteraceae]]</div><div class="higher-taxon"><small>tribe</small>[[Asteraceae tribe Cardueae]]</div><div class="higher-taxon"><small>genus</small>[[Cirsium]]</div><div class="higher-taxon"><small>species</small>[[Cirsium eatonii]]</div><div class="higher-taxon"><small>variety</small>[[Cirsium eatonii var. viperinum]]</div></div>
|volume=Volume 19
|mention_page=page 135
|treatment_page=page 151
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Stems </b>erect or ascending, 25–40 cm. <b>Leaf</b> faces glabrous or nearly so. <b>Heads</b> 1–5, subsessile or short-pedunculate, in erect, racemiform or corymbiform arrays. <b>Involucres</b> 3–5 cm, thinly arachnoid with non-septate trichomes, individual phyllaries evident. <b>Phyllaries</b> green or purplish-tinged; outer with numerous lateral spines; apical spines stout. <b>Corollas</b> lavender to purple, 29–35 mm, tubes 9–12.5 mm, throats 9–12 mm, lobes 9–11 mm. <b>Pappi</b> 20–25 mm.</span><!--

-->{{Treatment/Body
|phenology=Flowering summer (Jul–Sep).
|habitat=Rocky subalpine slopes, open bristlecone pine forests
|elevation=3300–3500 m
|distribution=Nev.
|discussion=<p>Variety viperinum is apparently endemic to upper elevations of the Snake Range of White Pine County, <i>Nevada</i>. Heads of <i></i>var.<i> viperinum</i> are similar in size to those of <i></i>var.<i> clokeyi</i>. These taxa can be distinguished readily by the features in the key. Ranges of the two varieties are separated by about 340 km. Hybridization with <i>Cirsium inamoenum</i> is suspected based upon apparently intermediate specimens.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Cirsium eatonii var. viperinum
|authority=D. J. Keil
|rank=variety
|parent rank=species
|synonyms=
|basionyms=
|family=Asteraceae
|phenology=Flowering summer (Jul–Sep).
|habitat=Rocky subalpine slopes, open bristlecone pine forests
|elevation=3300–3500 m
|distribution=Nev.
|reference=None
|publication title=Sida
|publication year=2004
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/eaa6e58056e40c9ef614d8f47aea294977a1a5e9/coarse_grained_fna_xml/V19-20-21/V19_143.xml
|tribe=Asteraceae tribe Cardueae
|genus=Cirsium
|species=Cirsium eatonii
|variety=Cirsium eatonii var. viperinum
}}<!--

-->[[Category:Treatment]][[Category:Cirsium eatonii]]