Difference between revisions of "Cirsium scariosum"

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{{Plant2000
 
{{Plant2000
|age development=developing
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|apex position=inner
|apex arrangement_or_shape=contorted
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|apex shape=narrowed;scabro-denticulate;with expanded , erose-dentate tips;spineless;tipped
|apex shape=acuminate,entire,toothed
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|array architecture=spiciform;racemiform;subcapitate
|apex width=thin
+
|blade arrangement or shape=linear;to_elliptic
|array architecture=congested,subcapitate
+
|blade shape=plane;undulate;unlobed;pinnatifid
|blade shape=oblanceolate,elliptic,lobed
+
|branch arrangement=crowded
|chromosome count=34
+
|chromosome count=34;36
|corolla coloration=white,purple-tinged,purple
+
|collar coloration=colored
|face coloration=green
+
|corolla coloration=white;lavender;purple
|face external_texture=glabrous,glabrate,tomentose,glabrous,villous,arachnoid-tomentose
+
|cypsela coloration=light;brown
|head architecture=subsessile,short-pedunculate
+
|face architecture=winged-petiolate;distal
|head arrangement_or_habit=clustered
+
|face architecture or shape=bractlike
|head size=reduced
+
|face count=present;many
|phyllary position=outer
+
|face development=developed
|phyllary shape=mid,ovate
+
|face duration=persistent
|spine fragility=weak
+
|face external texture=glabrous;tomentose;villous;glabrate;trichomes;arachnoid tomentose;glabrescent
|spine height_or_length=shorter
+
|face orientation=appressed
|spine length=longer
+
|face other=similar;proximal
|spine prominence_or_shape=flat
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|face position=adaxial;basal;cauline;distal;outer;mid
 +
|face size=reduced;reduced
 +
|face width=narrower
 +
|form architecture=caulescent
 +
|head arrangement=singly;crowded
 +
|head orientation=erect
 +
|involucre external texture=arachnoid;glabrate
 +
|involucre shape=ovoid;hemispheric
 +
|lobe arrangement=spaced
 +
|lobe orientation=spreading
 +
|lobe shape=linear-lanceolate;triangular;spinose-dentate;lobed
 +
|margin shape=entire;scarious-fringed
 +
|mound position=low
 +
|mound shape=rounded
 +
|pappus coloration=white;tan
 +
|peduncle architecture=leafy-bracted
 +
|phyllary arrangement=imbricate
 +
|phyllary shape=ovate;lanceolate;linear;linear-lanceolate
 +
|spine fragility=to_stout
 +
|spine orientation=erect;spreading
 +
|spine shape=flattened
 
|spine size=slender
 
|spine size=slender
|stem architecture=branched,leafy
+
|stem architecture=simple
|stem count=1
+
|stem count=absent
|stem external_texture=glabrous,arachnoid-tomentose
+
|stem external texture=glabrous;gray-tomentose;villous
|trichome architecture=septate
+
|stem internal texture=fleshy
|whole_organism architecture=acaulescent
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|stem orientation=erect
|whole_organism habit=bushy,mounding
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|stem width=thickened
|whole_organism life_style=plant
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|throat size=larger
|whole_organism orientation=erect
+
|tip shape=erose-dentate
|Flowering time=spring,mar,summer,aug,apr,may,jun,jul,late,nov,fall
+
|tip size=expanded
 +
|trichome architecture=septate;septate
 +
|whole organism architecture=acaulescent;caulescent;caulescent;taprooted;acaulescent;short-caulescent
 +
|whole organism height or length=short
 +
|whole organism life style=biennial;perennial;plant
 +
|whole organism orientation=erect
 
}}
 
}}
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.
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Cirsium scariosum is a widely distributed complex of intergrading races distributed from southwestern Canada to northwestern Mexico. These plants range from acaulescent rosettes with a tight cluster of sessile heads to tall, erect, unbranched plants, or moundlike, more or less openly branched herbs. Acaulescent and caulescent plants sometimes occur in the same population.

Latest revision as of 23:56, 18 February 2014


Cirsium scariosum is a widely distributed complex of intergrading races distributed from southwestern Canada to northwestern Mexico. These plants range from acaulescent rosettes with a tight cluster of sessile heads to tall, erect, unbranched plants, or moundlike, more or less openly branched herbs. Acaulescent and caulescent plants sometimes occur in the same population.