Difference between revisions of "Cirsium scariosum"

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{{Plant2000
 
{{Plant2000
|apex shape=entire,serrate
 
|apex size=expanded
 
 
|appendage external texture=scarious
 
|appendage external texture=scarious
|appendage shape=erose-toothed
+
|appendage position=inner
|array architecture=spiciform,racemiform
+
|appendage shape=acuminate,entire,erose-toothed
|blade shape=oblanceolate,elliptic,lobed
+
|appendage size=expanded
|chromosome count=34,36
+
|blade shape=linear,oblong,oblanceolate,elliptic,lobed,unlobed
|corolla coloration=white,purple
+
|chromosome count=34
|face coloration=green,throughout,or,unpigmented
+
|corolla coloration=white,pink-tinged,purple
|face external texture=glabrous,gray-tomentose,glabrous
+
|face external texture=gray-tomentose,adaxial,villous
|face internal texture=firm
+
|head architecture=sessile,subsessile,sessile,subsessile
|face position=adaxial,distal
+
|head arrangement=crowded
|face width=narrow
+
|head architecture=sessile,pedunculate
+
|leaf architecture or shape=bractlike
+
|leaf size=reduced
+
 
|phyllary position=outer
 
|phyllary position=outer
 
|phyllary shape=mid,ovate
 
|phyllary shape=mid,ovate
 +
|rosette density=dense
 +
|spine coloration=pink,or,purplish
 
|spine fragility=stout
 
|spine fragility=stout
|spine height or length=shorter
 
 
|spine length=longer
 
|spine length=longer
|spine size=1
+
|spine size=slender,1,1
|stem architecture=simple,unbranched,leafy
+
|stem architecture=unbranched,leafy
|stem external texture=villous,glabrate
+
|stem count=absent
|trichome architecture=septate
+
|stem external texture=villous,tomentose
|trichome external texture=arachnoid,tomentose
+
|stem fragility=stout
|whole organism architecture=caulescent,acaulescent
+
|stem height or length=short
 +
|stem internal texture=fleshy
 +
|trichome architecture=septate,non-septate,septate,septate
 +
|trichome external texture=villous
 +
|trichome width=fine
 +
|whole organism architecture=acaulescent,with,dense,rosettes,,of,leaves,and,cluster,,,of,sessile,or,subsessile,heads,.,caulescent
 +
|whole organism arrangement=cluster
 
|whole organism life style=plant
 
|whole organism life style=plant
|whole organism orientation=erect
+
|flowering time=summer,jun,jul,aug
|flowering time=summer,jun,jul,aug,sep,fall
+
 
}}
 
}}
Variety coloradense is common in the mountains of southern and central Colorado with outlying populations in northern New Mexico, northeastern Arizona, central Utah, and southeastern Wyoming. In Colorado it is largely allopatric with the usually acaulescent var. americanum. Some plants from the White Mountains and San Francisco Peaks of Arizona and from Gunnison County, Colorado, approach var. thorneae in having deeply divided, extremely spiny distal leaves that overtop the heads. Putative hybrids between var. coloradense and Cirsium grahamii have been documented in Apache County, Arizona, and between var. coloradense and C. undulatum in Las Animas County, Colorado.
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Variety americanum is a variable taxon widely distributed in mountains and valleys of the western United States from the eastern slope of the Cascades and Sierra Nevada across the northern Great Basin to the central Rocky Mountains. Within some populations dominated by acaulescent forms, occasional short, caulescent individuals or even taller plants may occur. These approach var. coloradense in the Colorado Rockies and resemble var. scariosum in the valleys of Oregon. Short caulescent individuals within populations of var. coloradense and var. scariosum approach var. americanum. Although the extremes are strikingly different, the genetic differences are apparently slight. Acaulescent individuals from the San Francisco Peaks and White Mountains of Arizona are treated here as var. coloradense. In the mountains of Colorado putative hybrids have been documented between Cirsium scariosum var. americanum and C. canescens and between C. scariosum var. americanum and C. undulatum.

Revision as of 19:15, 28 November 2013


Variety americanum is a variable taxon widely distributed in mountains and valleys of the western United States from the eastern slope of the Cascades and Sierra Nevada across the northern Great Basin to the central Rocky Mountains. Within some populations dominated by acaulescent forms, occasional short, caulescent individuals or even taller plants may occur. These approach var. coloradense in the Colorado Rockies and resemble var. scariosum in the valleys of Oregon. Short caulescent individuals within populations of var. coloradense and var. scariosum approach var. americanum. Although the extremes are strikingly different, the genetic differences are apparently slight. Acaulescent individuals from the San Francisco Peaks and White Mountains of Arizona are treated here as var. coloradense. In the mountains of Colorado putative hybrids have been documented between Cirsium scariosum var. americanum and C. canescens and between C. scariosum var. americanum and C. undulatum.