Difference between revisions of "Cirsium eatonii var. murdockii"

S. L. Welsh

Great Basin Naturalist 42: 200. 1982.

Common names: Northern mountain thistle
Synonyms: Cirsium murdockii (S. L. Welsh) Cronquist Cirsium polyphyllum (Rydberg) Petrak Cirsium tweedyi (Rydberg) Petrak
Treatment appears in FNA Volume 19. Treatment on page 152. Mentioned on page 126, 151, 156.
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|name=Cirsium murdockii
 
|name=Cirsium murdockii
 
|authority=(S. L. Welsh) Cronquist
 
|authority=(S. L. Welsh) Cronquist
}}{{Treatment/ID/Synonym
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}} {{Treatment/ID/Synonym
 
|name=Cirsium polyphyllum
 
|name=Cirsium polyphyllum
 
|authority=(Rydberg) Petrak
 
|authority=(Rydberg) Petrak
}}{{Treatment/ID/Synonym
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}} {{Treatment/ID/Synonym
 
|name=Cirsium tweedyi
 
|name=Cirsium tweedyi
 
|authority=(Rydberg) Petrak
 
|authority=(Rydberg) Petrak
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--><span class="statement" id="st-undefined" data-properties=""><b>Stems </b>erect or ascending, stout, 10–75 cm. <b>Leaf</b> faces glabrous or nearly so or abaxial ± villous and/or tomentose with septate or non-septate trichomes. <b>Heads</b> sessile or short-pedunculate in erect, few-headed, subcapitate or spiciform arrays. <b>Involucres</b> 2–3 cm, thinly to densely tomentose with septate or non-septate trichomes (phyllaries sometimes obscured by tomentum). <b>Phyllaries</b> green or purplish-tinged; outer with few lateral spines; apical spines slender. <b>Corollas</b> white to pink or lavender, 17–23 mm, tubes 6–10 mm, throats 5–8 mm, lobes 3–6 mm. <b>Pappi</b> 11–18 mm. <b>2n</b> = 34 (as C. tweedyi).</span><!--
+
--><span class="statement" id="st-undefined" data-properties=""><b>Stems </b>erect or ascending, stout, 10–75 cm. <b>Leaf</b> faces glabrous or nearly so or abaxial ± villous and/or tomentose with septate or non-septate trichomes. <b>Heads</b> sessile or short-pedunculate in erect, few-headed, subcapitate or spiciform arrays. <b>Involucres</b> 2–3 cm, thinly to densely tomentose with septate or non-septate trichomes (phyllaries sometimes obscured by tomentum). <b>Phyllaries</b> green or purplish-tinged; outer with few lateral spines; apical spines slender. <b>Corollas</b> white to pink or lavender, 17–23 mm, tubes 6–10 mm, throats 5–8 mm, lobes 3–6 mm. <b>Pappi</b> 11–18 mm. <b>2n</b> = 34 (as <i>C. tweedyi</i>).</span><!--
  
 
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|distribution=Colo.;Idaho;Mont.;Nev.;Utah;Wyo.
 
|distribution=Colo.;Idaho;Mont.;Nev.;Utah;Wyo.
 
|discussion=<p>Of conservation concern.</p><!--
 
|discussion=<p>Of conservation concern.</p><!--
--><p>Variety murdockii grows in the central Rocky Mountains from central Idaho and southern Montana to western Wyoming and northern Colorado. It also grows in the Ruby Mountains of northern Nevada and the Uintah Mountains of northeastern Utah. Considerable variation occurs in quantity and quality of pubescence of the involucres of var. murdockii. In some individuals the pubescence is so dense that it obscures the phyllary bodies whereas in others the individual phyllaries are clearly visible. Most commonly the pubescence consists primarily of septate trichomes, but sometimes finer non-septate trichomes predominate. Both types of trichomes may be present.</p><!--
+
--><p>Variety murdockii grows in the central Rocky Mountains from central Idaho and southern Montana to western Wyoming and northern Colorado. It also grows in the Ruby Mountains of northern <i>Nevada</i> and the Uintah Mountains of northeastern Utah. Considerable variation occurs in quantity and quality of pubescence of the involucres of <i></i>var.<i> murdockii</i>. In some individuals the pubescence is so dense that it obscures the phyllary bodies whereas in others the individual phyllaries are clearly visible. Most commonly the pubescence consists primarily of septate trichomes, but sometimes finer non-septate trichomes predominate. Both types of trichomes may be present.</p><!--
--><p>Variety murdockii is known to hybridize with Cirsium pulcherrimum var. pulcherrimum and C. scariosum var. scariosum in Wyoming.</p>
+
--><p>Variety murdockii is known to hybridize with <i>Cirsium pulcherrimum </i>var.<i> pulcherrimum</i> and <i>C. scariosum </i>var.<i> scariosum</i> in Wyoming.</p>
 
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|publication year=1982
 
|publication year=1982
 
|special status=
 
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/9216fc802291cd3df363fd52122300479582ede7/coarse_grained_fna_xml/V19-20-21/V19_146.xml
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|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/8f726806613d60c220dc4493de13607dd3150896/coarse_grained_fna_xml/V19-20-21/V19_146.xml
 
|tribe=Asteraceae tribe Cardueae
 
|tribe=Asteraceae tribe Cardueae
 
|genus=Cirsium
 
|genus=Cirsium

Revision as of 15:09, 18 September 2019

Stems erect or ascending, stout, 10–75 cm. Leaf faces glabrous or nearly so or abaxial ± villous and/or tomentose with septate or non-septate trichomes. Heads sessile or short-pedunculate in erect, few-headed, subcapitate or spiciform arrays. Involucres 2–3 cm, thinly to densely tomentose with septate or non-septate trichomes (phyllaries sometimes obscured by tomentum). Phyllaries green or purplish-tinged; outer with few lateral spines; apical spines slender. Corollas white to pink or lavender, 17–23 mm, tubes 6–10 mm, throats 5–8 mm, lobes 3–6 mm. Pappi 11–18 mm. 2n = 34 (as C. tweedyi).


Phenology: Flowering summer (Jul–Sep).
Habitat: Talus slopes, rocky subalpine and alpine ridges, openings in subalpine forests, subalpine meadows
Elevation: 2300–3900 m

Distribution

V19-146-distribution-map.gif

Colo., Idaho, Mont., Nev., Utah, Wyo.

Discussion

Of conservation concern.

Variety murdockii grows in the central Rocky Mountains from central Idaho and southern Montana to western Wyoming and northern Colorado. It also grows in the Ruby Mountains of northern Nevada and the Uintah Mountains of northeastern Utah. Considerable variation occurs in quantity and quality of pubescence of the involucres of var. murdockii. In some individuals the pubescence is so dense that it obscures the phyllary bodies whereas in others the individual phyllaries are clearly visible. Most commonly the pubescence consists primarily of septate trichomes, but sometimes finer non-septate trichomes predominate. Both types of trichomes may be present.

Variety murdockii is known to hybridize with Cirsium pulcherrimum var. pulcherrimum and C. scariosum var. scariosum in Wyoming.

Selected References

None.

Lower Taxa

None.
David J. Keil +
S. L. Welsh +
Cnicus eatonii +
Northern mountain thistle +
Colo. +, Idaho +, Mont. +, Nev. +, Utah +  and Wyo. +
2300–3900 m +
Talus slopes, rocky subalpine and alpine ridges, openings in subalpine forests, subalpine meadows +
Flowering summer (Jul–Sep). +
Great Basin Naturalist +
Illustrated +  and Endemic +
Cirsium murdockii +, Cirsium polyphyllum +  and Cirsium tweedyi +
Cirsium eatonii var. murdockii +
Cirsium eatonii +
variety +