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*Centaurea scabiosa Linnaeus. Greater Knapweed, Hardheads. Phen: Jun-Sep. Hab: Disturbed areas. Dist: Native of Europe. Naturalized in KY, PA, NJ (FNA), and other states in e. North America.

Origin/Endemic status: Europe

Synonymy: = C, F, FNA19, G, GrPl, K1, K3, K4, NE, NY, Oh3; = n/a – Pa

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