Difference between revisions of "Cirsium scariosum"

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{{Plant2000
 
{{Plant2000
|appendage external_texture=scarious
+
|apex position=inner
|appendage position=inner
+
|apex shape=narrowed;scabro-denticulate;with expanded , erose-dentate tips;spineless;tipped
|appendage shape=acuminate,entire,erose-toothed
+
|array architecture=spiciform;racemiform;subcapitate
|appendage size=expanded
+
|blade arrangement or shape=linear;to_elliptic
|blade shape=linear,oblong,oblanceolate,elliptic,lobed,unlobed
+
|blade shape=plane;undulate;unlobed;pinnatifid
|chromosome count=34,36
+
|branch arrangement=crowded
|corolla coloration=white,purple
+
|chromosome count=34;36
|head architecture=sessile,short-pedunculate
+
|collar coloration=colored
|head arrangement_or_habit=clustered
+
|corolla coloration=white;lavender;purple
|leaf arrangement=crowded
+
|cypsela coloration=light;brown
|phyllary position=outer
+
|face architecture=winged-petiolate;distal
|phyllary shape=mid,ovate
+
|face architecture or shape=bractlike
|spine coloration=pink,or,purplish
+
|face count=present;many
|spine count=numerous
+
|face development=developed
|spine fragility=weak
+
|face duration=persistent
|spine position=distal
+
|face external texture=glabrous;tomentose;villous;glabrate;trichomes;arachnoid tomentose;glabrescent
|spine size=larger,1
+
|face orientation=appressed
|spine width=narrow,thin
+
|face other=similar;proximal
|stem architecture=simple,leafy
+
|face position=adaxial;basal;cauline;distal;outer;mid
|stem external_texture=glabrous,villous,tomentose
+
|face size=reduced;reduced
|trichome architecture=septate
+
|face width=narrower
|whole_organism architecture=caulescent,acaulescent
+
|form architecture=caulescent
|whole_organism life_style=plant
+
|head arrangement=singly;crowded
|whole_organism orientation=erect
+
|head orientation=erect
|Flowering time=summer,jun,jul,aug,sep,fall
+
|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
 +
|stem architecture=simple
 +
|stem count=absent
 +
|stem external texture=glabrous;gray-tomentose;villous
 +
|stem internal texture=fleshy
 +
|stem orientation=erect
 +
|stem width=thickened
 +
|throat size=larger
 +
|tip shape=erose-dentate
 +
|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
 
}}
 
}}
The presence of Cirsium scariosum on the islands of the Mingan Archipelago in Quebec, some 3200 km east of the Rocky Mountains populations, has led to alternative hypotheses regarding the disjunction. Frère Marie-Victorin (1925) hypothesized that the disjunct distribution of C. minganense from what he called C. foliosum (Hooker) Candolle was a result of migration during deglaciation (18,000 to ca. 8000 BP) from a glacial refugium in western North America to eastern Canada in the barren habitats along the receding ice front. Later (1938) he presented a second hypothesis that Pleistocene glacial events had divided a preglacial range into vicariant populations that survived in separate refugia in western and eastern regions. R. J. Moore and C. Frankton (1967) argued that the disjunction is modern, resulting from a chance introduction of C. scariosum from western North America to Quebec in the early twentieth century. They reached this conclusion because early collectors that had visited the Mingan Archipelago had failed to collect this conspicuous thistle.
+
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 22:56, 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.

Facts about "Cirsium scariosum"
apex positioninner +
apex shapenarrowed +, scabro-denticulate +, with expanded , erose-dentate tips +, spineless + and tipped +
array architecturespiciform +, racemiform + and subcapitate +
blade arrangement or shapelinear + and to elliptic +
blade shapeplane +, undulate +, unlobed + and pinnatifid +
branch arrangementcrowded +
chromosome count34 + and 36 +
collar colorationcolored +
corolla colorationwhite +, lavender + and purple +
cypsela colorationlight + and brown +
face architecturewinged-petiolate + and distal +
face architecture or shapebractlike +
face countpresent + and many +
face developmentdeveloped +
face durationpersistent +
face external textureglabrous +, tomentose +, villous +, glabrate +, trichomes +, arachnoid tomentose + and glabrescent +
face orientationappressed +
face othersimilar + and proximal +
face positionadaxial +, basal +, cauline +, distal +, outer + and mid +
face sizereduced +
face widthnarrower +
form architecturecaulescent +
head arrangementsingly + and crowded +
head orientationerect +
involucre external texturearachnoid + and glabrate +
involucre shapeovoid + and hemispheric +
lobe arrangementspaced +
lobe orientationspreading +
lobe shapelinear-lanceolate +, triangular +, spinose-dentate + and lobed +
margin shapeentire + and scarious-fringed +
mound positionlow +
mound shaperounded +
pappus colorationwhite + and tan +
peduncle architectureleafy-bracted +
phyllary arrangementimbricate +
phyllary shapeovate +, lanceolate +, linear + and linear-lanceolate +
spine fragilityto stout +
spine orientationerect + and spreading +
spine shapeflattened +
spine sizeslender +
stem architecturesimple +
stem countabsent +
stem external textureglabrous +, gray-tomentose + and villous +
stem internal texturefleshy +
stem orientationerect +
stem widththickened +
throat sizelarger +
tip shapeerose-dentate +
tip sizeexpanded +
trichome architectureseptate +
whole organism architectureacaulescent +, caulescent +, taprooted + and short-caulescent +
whole organism height or lengthshort +
whole organism life stylebiennial +, perennial + and plant +
whole organism orientationerect +