Cirsium lecontei

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Cirsium lecontei occurs on the southern coastal plain. R. J. Moore and C. Frankton (1969) suggested that it originated as a derivative of ancient hybridization between the ancestors of C. horridulum and C. nuttallii. They further suggested a relationship between C. lecontei and C. grahamii of Arizona and hypothesized an ancient dispersal from the southeastern coastal plain to the western cordillera. Although such relationships are possible, I have seen little support for them in my examination of these taxa. I think it is more likely that C. lecontei, C. horridulum, and C. nuttallii originated from a common stock, and that the resemblances between C. lecontei and C. grahamii are a result of convergence.

Facts about "Cirsium lecontei"
apex shapelinear-acuminate +
array architectureopen + and corymbiform +
base architectureclasping +
base architecture or shapebractlike +
base arrangementseparated +
base countfew +
base positiondistal cauline +
base shapedecurrent +
blade shapelinear +, oblong +, elliptic +, toothed + and pinnatifid +
bract shapeinvolucrelike +
branch orientationascending +
chromosome count28 + and 32 +
collar colorationpaler +
collar size0.75 +
corolla colorationpink-purple +
cypsela colorationbrown +
face architecturesessile +
face countabsent +
face external textureglabrate +, arachnoid +, adaxial + and villous +
face orientationappressed +
face otherprincipal +
face positionbasal +, cauline +, outer + and middle +
face sizereduced +
flowering timespringsummer +, may +, jun +, jul + and aug +
habitatsandy pinelands of coastal plain + and in damp soil +
habitat moisturewet +
head arrangementsingly +
involucre external texturearachnoid + and glabrate +
involucre shapecylindric + and campanulate +
lobe shapeundivided + and few-toothed +
margin shapespinulose-serrulate +
peduncle prominenceelevated +
phyllary arrangementimbricate +
phyllary shapeovate +, lanceolate + and linear-lanceolate +
ridge prominenceprominent +
spine orientationascending +
stem architecturenaked +
stem count1/2 +
stem external texturearachnoid +
stem orientationerect +
stem positiondistal +
trichome architecturemulticellular +
trichome external texturecoarse +
whole organism life styleperennial + and biennial +