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Centaurea debeauxii subsp. thuillieri Dostál
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Flora of North America Editorial Committee, e. 2006. Magnoliophyta: Asteridae, part 6: Asteraceae, part 1. 19: i–xxiv, 1–579. In Fl. N. Amer.. Oxford University Press, New York.
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Centaurea jacea nothosubsp. pratensis (W.D.J. Koch) Čelak.
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Flora of North America Editorial Committee, e. 2006. Magnoliophyta: Asteridae, part 6: Asteraceae, part 1. 19: i–xxiv, 1–579. In Fl. N. Amer.. Oxford University Press, New York.
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Centaurea jacea var. pratensis W.D.J. Koch
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Flora of North America Editorial Committee, e. 2006. Magnoliophyta: Asteridae, part 6: Asteraceae, part 1. 19: i–xxiv, 1–579. In Fl. N. Amer.. Oxford University Press, New York.
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Centaurea nigra var. radiata DC.
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Flora of North America Editorial Committee, e. 2006. Magnoliophyta: Asteridae, part 6: Asteraceae, part 1. 19: i–xxiv, 1–579. In Fl. N. Amer.. Oxford University Press, New York.
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Centaurea thuillieri (Dostál) J. Duvign. & Lambinon
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Flora of North America Editorial Committee, e. 2006. Magnoliophyta: Asteridae, part 6: Asteraceae, part 1. 19: i–xxiv, 1–579. In Fl. N. Amer.. Oxford University Press, New York.
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