Cirsium horridulum

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Although several variants have been given taxonomic recognition as species, these seem at most races. Flower color varies greatly, sometimes within populations and sometimes on a populational or regional basis. Herbarium specimens are sometimes difficult to assign to variety.

Facts about "Cirsium horridulum"
apex prominence or shapeflat +
apex shapeacuminate +
array architecturesubcapitate + and corymbiform +
base architecturesessile +, auriculate-clasping + and spinier than the proximal +
base arrangementdistributed +
base otherprincipal +
base positioncauline + and distal cauline +
base shapetapered +
base sizereduced +
blade shapelinear +, oblanceolate +, oblong-elliptic +, unlobed +, spiny-dentate + and pinnatifid +
body colorationreddish-tinged +
branch fragilitystout +
branch height or lengthshort +
branch orientationspreading + and ascending +
chromosome count32 +, 33 +, 34 + and 35 +
collar variabilitydifferentiated +
corolla colorationwhite +, yellow +, pink +, purple + and red +
cypsela colorationstraw-colored + and tan +
face countpresent +
face external texturesubglabrous +, tomentose +, adaxial + and villous +
face orientationappressed-ascending +
face positionbasal +, outer + and middle +
face reliefscabridulous +
involucre shapehemispheric + and campanulate +
lobe shapespiny-dentate + and lobed +
margin colorationreddish +
margin external texturesetulose-ciliolate +
phyllary arrangementimbricate +
phyllary colorationgreen + and stramineous +
phyllary shapelanceolate + and linear +
phyllary sizesubequal +
ring shapeinvolucrelike +
root internal texturefleshy +
spine fragilitystout + and weak +
stem external textureglabrous + and tomentose +
stem fragilitystout +
stem orientationerect +
taproot durationperennating +
taproot fragilitystout +
trichome architectureseptate +
whole organism internal texturefleshy +
whole organism life stylebiennial + and perennial +