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... more about "Centaurea calcitrapa"
David J. Keil +  and Jörg Ochsmann +
Linnaeus +
Purple star-thistle +, caltrops +, chausse-trappe +  and centaurée chausse-trappe +
Ont. +, Ala. +, Ariz. +, Calif. +, D.C. +, Fla. +, Ga. +, Ill. +, Iowa +, Md. +, Mass. +, N.J. +, N.Mex. +, N.Y. +, Oreg. +, Pa. +, Utah +, Va. +, Wash. +, Europe +  and Africa. +
0–1700 m +
Pastures, fields, roadsides +
Flowering summer–autumn (Jun–Nov). +
Acosta +, Cnicus +, Grossheimia +, Jacea +  and Leucacantha +
Centaurea calcitrapa +
Centaurea +
species +