View source for Cirsium clavatum var. clavatum

{{Treatment/ID
|accepted_name=Cirsium clavatum var. clavatum
|accepted_authority=
|publications=
|common_names=Fish Lake thistle
|special_status={{Treatment/ID/Special_status
|code=E
|label=Endemic
}}
|basionyms=
|synonyms={{Treatment/ID/Synonym
|name=Cirsium clavatum var. markaguntense
|authority=
|rank=variety
}}
|hierarchy=Asteraceae;Asteraceae tribe Cardueae;Cirsium;Cirsium clavatum;Cirsium clavatum var. clavatum
|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 clavatum]]</div><div class="higher-taxon"><small>variety</small>[[Cirsium clavatum var. clavatum]]</div></div>
|volume=Volume 19
|mention_page=page 128
|treatment_page=page 127
}}<!--

--><span class="statement" id="st-d0_s0" data-properties="leaf face pubescence"><b>Abaxial </b>leaf faces glabrous to ± tomentose.</span> <span class="statement" id="st-d0_s1" data-properties="involucre shape;involucre length;involucre width;involucre pubescence;involucre pubescence;trichome width;trichome architecture"><b>Involucres </b>ovoid to campanulate, 1.5–2 × 1–2 cm, glabrous or thinly arachnoid-tomentose with fine, non-septate trichomes.</span> <span class="statement" id="st-d0_s2" data-properties="phyllary arrangement;phyllary coloration;phyllary coloration;phyllary shape;series quantity;subapical patch coloration;ridge size or width;ridge coating"><b>Phyllaries </b>in 5–6 series, strongly imbricate, green or with dark subapical patch, lanceolate to ovate, abaxial faces with narrow glutinous ridge;</span> <span class="statement" id="st-d0_s3" data-properties="outer and middle base fixation or orientation;apical appendage orientation;apical appendage orientation;apical appendage shape;apical appendage architecture or shape;apical appendage texture;apical appendage shape;apical appendage shape;spine orientation;spine orientation;spine some measurement">outer and middle bases appressed, apical appendages erect or ascending, linear-lanceolate, entire, usually not scarious or fringed, acicular-acuminate, spines erect or ascending, 3–6 mm;</span> <span class="statement" id="st-d0_s4" data-properties="base apex course;base apex orientation;base apex size or width;base apex prominence or shape;base apex shape;base apex shape;base apex size;base apex architecture or relief">apices of inner sometimes flexuous or reflexed, narrow, flat, and entire or minutely toothed to slightly expanded and erose.</span><!--

-->{{Treatment/Body
|phenology=Flowering summer (Jun–Sep).
|habitat=Sagebrush scrub, aspen groves, meadows, openings in montane coniferous forests
|elevation=2100–3400 m
|distribution=Colo.;Utah.
|discussion=<p>Cirsium clavatum grows from the Colorado Plateau of central Utah eastward into the Rocky Mountains of western Colorado. R. J. Moore and C. Frankton (1965) suggested that C. clavatum (i.e., var. clavatum here) is a derivative of hybridization between C. eatonii and C. centaureae (i.e., C. clavatum var. americanum here). S. L. Welsh (1983) noted that the distribution of var. clavatum is distinct from those of var. americanum and C. eatonii. It is certainly possible that ancient hybridization may have contributed to the origin of var. clavatum, but there is no indication that the modern plants over most of its range are hybrids. The morphology of certain plants from southeastern Utah indicates a possibility of hybridization between C. clavatum and C. eatonii var. eatonii. The close relationship between var. clavatum and var. americanum is evident in the many overlapping vegetative features. The recently described C. clavatum var. markaguntense S. L. Welsh is a minor variant with subentire glabrous leaves.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Cirsium clavatum var. clavatum
|authority=
|rank=variety
|parent rank=species
|synonyms=Cirsium clavatum var. markaguntense
|basionyms=
|family=Asteraceae
|phenology=Flowering summer (Jun–Sep).
|habitat=Sagebrush scrub, aspen groves, meadows, openings in montane coniferous forests
|elevation=2100–3400 m
|distribution=Colo.;Utah.
|reference=None
|publication title=
|publication year=
|special status=Endemic
|source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/84153f6d59a0a91d69695978a64cee7560374f8e/V19-20-21/V19_91.xml
|tribe=Asteraceae tribe Cardueae
|genus=Cirsium
|species=Cirsium clavatum
|variety=Cirsium clavatum var. clavatum
|apical appendage architecture or shape=entire
|apical appendage orientation=ascending;erect
|apical appendage shape=acicular-acuminate;fringed;linear-lanceolate
|apical appendage texture=scarious
|base apex architecture or relief=erose
|base apex course=flexuous
|base apex orientation=reflexed
|base apex prominence or shape=flat
|base apex shape=toothed;entire
|base apex size=expanded
|base apex size or width=narrow
|involucre length=1.5cm;2cm
|involucre pubescence=arachnoid-tomentose;glabrous
|involucre shape=ovoid;campanulate
|involucre width=1cm;2cm
|leaf face pubescence=glabrous;more or less tomentose
|outer and middle base fixation or orientation=appressed
|phyllary arrangement=imbricate
|phyllary coloration=with dark subapical patch;green
|phyllary shape=lanceolate;ovate
|ridge coating=glutinous
|ridge size or width=narrow
|series quantity=5;6
|spine orientation=ascending;erect
|spine some measurement=3mm;6mm
|subapical patch coloration=dark
|trichome architecture=non-septate
|trichome width=fine
}}<!--

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