Cirsium discolor

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Cirsium discolor is widespread in eastern North America from the prairies of southeastern Saskatchewan, western Minnesota, and Iowa south to northern Louisiana and east across southern Canada to the New England states and the southern Appalachians. It hybridizes with both C. altissimum (discussed thereunder) and C. muticum (G. B. Ownbey 1951b, 1964; W. L. Bloom 1977). Meiosis in first-generation hybrids between C. discolor and C. muticum is usually irregular (Bloom) and most pollen grains are infertile (Ownbey 1951b; Bloom). The presence of a small number of viable cypselae in heads of putative F1 hybrids (Ownbey 1951b) indicates that some F2 hybrids or backcrosses are formed.

Facts about "Cirsium discolor"
apex orientationspreading +
apex shapeflattened + and serrulate +
apex widthnarrow +
array architecturecorymbiform + and paniculiform +
base architectureclasping +
base arrangementdistributed +
base developmentdeveloped +
base otherprincipal +
base positioncauline + and distal cauline +
base shapetapered +, narrowed + and decurrent +
base sizereduced +
blade omidveins +
blade other or positionproximal +
blade shapeoblanceolate +, elliptic +, ovate +, divided + and undivided +
branch orientationascending +
chromosome count20 +, 21 + and 22 +
collar colorationstraw-colored +
corolla colorationpink +, purple + and white +
cypsela colorationtan + and brownish +
enlargement architecture or shapetuberlike +
face colorationgreen +
face countabsent +
face external texturewhite-tomentose +, villous + and glabrate +
face orientationappressed +
face positionbasal + and outer +
flowering timesummerfall +, jun +, jul +, aug +, sep + and oct +
habitattallgrass prairies +, deciduous woodlands +, forest openings + and disturbed sites in damp soil +
involucre external texturearachnoid +
involucre shapeovoid +, cylindric + and campanulate +
leaf arrangementcrowded +
lobe shapelinear-lanceolate +
margin orientationascending +
margin shapeentire +, spinulose +, few + and lobed +
margin shape or vernationrevolute +
phyllary arrangementimbricate +
phyllary colorationgreenish +
phyllary shapeovate + and lanceolate +
ridge widthnarrow +
root external texturecoarse +
root internal texturefibrous +
spine orientationspreading + and deflexed +
spine sizeslender +
stem countsingle +
stem external texturevillous +, glabrate + and tomentose +
stem orientationerect +
taproot arrangementcluster +
throat widthwider +
trichome architectureseptate +
whole organism life stylebiennial + and perennial +
zone colorationdarker +
zone positionsubapical +