View source for Cirsium arizonicum var. bipinnatum

{{Treatment/ID
|accepted_name=Cirsium arizonicum var. bipinnatum
|accepted_authority=(Eastwood) D. J. Keil
|publications={{Treatment/Publication
|title=Sida
|place=21: 209. 2004
|year=2004
}}
|common_names=Four Corners thistle
|basionyms={{Treatment/ID/Basionym
|name=Cnicus drummondii var. bipinnatus
|authority=Eastwood
|publication_title=Zoë
|publication_place=4: 8. 1893
}}
|synonyms={{Treatment/ID/Synonym
|name=Cirsium bipinnatum
|authority=(Eastwood) Rydberg
}} {{Treatment/ID/Synonym
|name=Cirsium calcareum
|authority=(M. E. Jones) Wooton & Standley
}} {{Treatment/ID/Synonym
|name=Cirsium calcareum var. bipinnatum
|authority=(Eastwood) S. L. Welsh
}} {{Treatment/ID/Synonym
|name=Cirsium calcareum var. pulchellum
|authority=(Greene ex Rydberg) S. L. Welsh
}} {{Treatment/ID/Synonym
|name=Cirsium diffusum
|authority=unknown
}} {{Treatment/ID/Synonym
|name=Cirsium pulchellum
|authority=unknown
}} {{Treatment/ID/Synonym
|name=Cirsium pulchellum subsp. bipinnatum
|authority=(Eastwood) Petrak
}} {{Treatment/ID/Synonym
|name=Cirsium pulchellum subsp. diffusum
|authority=(Eastwood) Petrak
}} {{Treatment/ID/Synonym
|name=Cirsium pulchellum var. glabrescens
|authority=Petrak
}}
|hierarchy=Asteraceae;Asteraceae tribe Cardueae;Cirsium;Cirsium arizonicum;Cirsium arizonicum var. bipinnatum
|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 arizonicum]]</div><div class="higher-taxon"><small>variety</small>[[Cirsium arizonicum var. bipinnatum]]</div></div>
|volume=Volume 19
|mention_page=page 142
|treatment_page=page 143
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Stems </b>glabrous to tomentose, usually without septate trichomes. <b>Leaf</b> blades unlobed to deeply divided, faces glabrous to tomentose on one or both, usually without septate trichomes; main marginal spines slender to stout, 3–10 mm; cauline bases narrowed to truncate or clasping or decurrent as spiny wings to 30 mm. <b>Involucres</b> cylindric or ovoid to campanulate; spines of mid phyllaries 1–6 mm, slender to very stout. <b>Corollas</b> usually lavender to purple or reddish purple, 22–34 mm, tubes 7–12, throats 4–9 mm, lobes 8–18 mm; style tips 1.2–4.5 mm.</span><!--

-->{{Treatment/Body
|phenology=Flowering spring–summer (May–Oct).
|habitat=Canyons, rocky slopes, desert scrub, pine-oak-juniper woodlands, openings in montane coniferous forests
|elevation=900–3100 m
|distribution=Ariz.;Colo.;N.Mex.;Utah.
|discussion=<p>Variety bipinnatum grows in the Colorado Plateau of New Mexico, northeastern Arizona, southeastern Utah, and southwestern Colorado south to the Sacramento Mountains of southern New Mexico. It is a polymorphic assemblage of races and local populations with overlapping patterns of variation. Extremes are diverse and strikingly different, and various authors have attempted to segregate variants as species, subspecies, or varieties. Apparently independent segregation of character states of multiple variable characters has resulted in a complex array of local morphotypes. Leaves range from wholly glabrous to densely tomentose on one or both faces. The bases of cauline leaves vary from sessile and not at all decurrent to prominently decurrent with spiny wings to 3 cm. Leaf lobing and spininess are similarly variable. Heads may be solitary at the branch tips or densely clustered. I have been unable to detect patterns that can consistently separate the many forms in any meaningful way.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Cirsium arizonicum var. bipinnatum
|author=
|authority=(Eastwood) D. J. Keil
|rank=variety
|parent rank=species
|synonyms=Cirsium bipinnatum;Cirsium calcareum;Cirsium calcareum var. bipinnatum;Cirsium calcareum var. pulchellum;Cirsium diffusum;Cirsium pulchellum;Cirsium pulchellum subsp. bipinnatum;Cirsium pulchellum subsp. diffusum;Cirsium pulchellum var. glabrescens
|basionyms=Cnicus drummondii var. bipinnatus
|family=Asteraceae
|phenology=Flowering spring–summer (May–Oct).
|habitat=Canyons, rocky slopes, desert scrub, pine-oak-juniper woodlands, openings in montane coniferous forests
|elevation=900–3100 m
|distribution=Ariz.;Colo.;N.Mex.;Utah.
|reference=None
|publication title=Sida
|publication year=2004
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f6b125a955440c0872999024f038d74684f65921/coarse_grained_fna_xml/V19-20-21/V19_127.xml
|tribe=Asteraceae tribe Cardueae
|genus=Cirsium
|species=Cirsium arizonicum
|variety=Cirsium arizonicum var. bipinnatum
}}<!--

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