Difference between revisions of "Cirsium scariosum"

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{{Plant2000
 
{{Plant2000
|appendage external texture=scarious
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|age development=developing
|appendage position=inner
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|apex arrangement or shape=contorted
|appendage shape=acuminate,entire,erose-toothed
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|apex shape=acuminate,entire,toothed
|appendage size=expanded
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|apex width=thin
|blade shape=oblong,oblanceolate,elliptic,lobed,unlobed
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|array architecture=congested,subcapitate
|corolla coloration=rose-purple
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|blade shape=oblanceolate,elliptic,lobed
|face coloration=green,green
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|chromosome count=34
|face external texture=glabrous,white-tomentose,glabrous,villous
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|corolla coloration=white,purple-tinged,purple
|head architecture=sessile,short-pedunculate
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|face coloration=green
|head arrangement=crowded
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|face external texture=glabrous,glabrate,tomentose,glabrous,villous,arachnoid-tomentose
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|head architecture=subsessile,short-pedunculate
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|head arrangement or habit=clustered
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|head size=reduced
 
|phyllary position=outer
 
|phyllary position=outer
 
|phyllary shape=mid,ovate
 
|phyllary shape=mid,ovate
 +
|spine fragility=weak
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|spine height or length=shorter
 
|spine length=longer
 
|spine length=longer
|spine size=1,slender
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|spine prominence or shape=flat
|stem architecture=simple,leafy
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|spine size=slender
|stem external texture=glabrous,villous,tomentose,arachnoid,tomentose
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|stem architecture=branched,leafy
|trichome architecture=septate,septate
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|stem count=1
|whole organism architecture=subacaulescent,caulescent
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|stem external texture=glabrous,arachnoid-tomentose
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|trichome architecture=septate
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|whole organism architecture=acaulescent
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|whole organism habit=bushy,mounding
 
|whole organism life style=plant
 
|whole organism life style=plant
 
|whole organism orientation=erect
 
|whole organism orientation=erect
|flowering time=spring,mar,apr,summer,may,jun,jul,aug
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|flowering time=spring,mar,summer,aug,apr,may,jun,jul,late,nov,fall
 
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Variety toiyabense occurs in the western Basin and Range province from northern Nevada to southeastern Oregon and southwestern Idaho.
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Variety citrinum is the southern California race of Cirsium scariosum. As is the case in other varieties of this complex, taxonomic recognition has been given to local populations, named on the basis of limited samples. After examining specimens gathered from various populations in southern California, I realized that although exemplars of local populations may have distinctive features, there are so many intermediates that recognizing any of the local races becomes arbitrary. Individuals treated as Cirsium loncholepis (from coastal sites bordering the mouth of the Santa Maria River and adjacent regions in San Luis Obispo and Santa Barbara counties) are often indistinguishable from plants of upland populations of the San Emigdio Mountains (Kern and Ventura counties) in the vicinity of the headwaters of the Cuyama River, a tributary of the Santa Maria River. Other individuals from the San Emigdio Mountains cannot be distinguished from plants of other upland and lowland southern California sites ranging south to San Diego County.

Revision as of 19:15, 28 November 2013


Variety citrinum is the southern California race of Cirsium scariosum. As is the case in other varieties of this complex, taxonomic recognition has been given to local populations, named on the basis of limited samples. After examining specimens gathered from various populations in southern California, I realized that although exemplars of local populations may have distinctive features, there are so many intermediates that recognizing any of the local races becomes arbitrary. Individuals treated as Cirsium loncholepis (from coastal sites bordering the mouth of the Santa Maria River and adjacent regions in San Luis Obispo and Santa Barbara counties) are often indistinguishable from plants of upland populations of the San Emigdio Mountains (Kern and Ventura counties) in the vicinity of the headwaters of the Cuyama River, a tributary of the Santa Maria River. Other individuals from the San Emigdio Mountains cannot be distinguished from plants of other upland and lowland southern California sites ranging south to San Diego County.