Difference between revisions of "Cirsium eatonii"

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{{Plant2000
 
{{Plant2000
|array architecture=few-headed,subcapitate,spiciform
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|array architecture=spiciform,racemiform
 
|array orientation=erect
 
|array orientation=erect
 
|chromosome count=34
 
|chromosome count=34
|corolla coloration=white,pink,lavender
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|corolla coloration=pink,purple
|face external texture=glabrous,or,abaxial
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|face external texture=glabrous,or,villous
|head architecture=sessile,short-pedunculate
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|face position=abaxial
|involucre external texture=tomentose
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|head architecture=subsessile,short-pedunculate,branched
|phyllary coloration=green,purplish-tinged
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|head arrangement=crowded
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|involucre external texture=villous,arachnoid
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|phyllary coloration=green
 
|phyllary position=outer
 
|phyllary position=outer
|phyllary prominence=obscured
 
 
|spine count=few
 
|spine count=few
|spine size=slender
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|spine fragility=stout
 
|stem fragility=stout
 
|stem fragility=stout
 
|stem orientation=erect,ascending
 
|stem orientation=erect,ascending
|trichome architecture=septate,non-septate,septate,non-septate
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|trichome architecture=septate,septate,non-septate
|flowering time=summer,jun,jul,aug,sep,fall
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|flowering time=summer,jun,jul,aug
 
}}
 
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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.
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Variety peckii occurs from Steens Mountain and the Pueblo Mountains of Harney County, Oregon, south to the Black Rock Range and Jackson Mountains of Humboldt County, Nevada. On the lower portion of its distribution along Steens Mountain Loop Road at an elevation of about 1900 m, var. peckii and Cirsium inamoenum grow together and freely hybridize, forming a complex hybrid swarm. Intermediates variably combine the features of the parent taxa, with the habit more openly branched than typical for C. eatonii var. peckii, variably arachnoid tomentose leaves, ± glandular phyllaries, and lavender to pale pink flowers. Variety peckii may range as far south as the West Humboldt Mountains. The type of Cirsium humboldtense Rydberg (Carduus nevadensis Greene) closely resembles some of the hybrids between C. inamoenum and C. eatonii var. peckii.

Revision as of 19:15, 28 November 2013


Variety peckii occurs from Steens Mountain and the Pueblo Mountains of Harney County, Oregon, south to the Black Rock Range and Jackson Mountains of Humboldt County, Nevada. On the lower portion of its distribution along Steens Mountain Loop Road at an elevation of about 1900 m, var. peckii and Cirsium inamoenum grow together and freely hybridize, forming a complex hybrid swarm. Intermediates variably combine the features of the parent taxa, with the habit more openly branched than typical for C. eatonii var. peckii, variably arachnoid tomentose leaves, ± glandular phyllaries, and lavender to pale pink flowers. Variety peckii may range as far south as the West Humboldt Mountains. The type of Cirsium humboldtense Rydberg (Carduus nevadensis Greene) closely resembles some of the hybrids between C. inamoenum and C. eatonii var. peckii.