Centaurea nigra Linnaeus. Black Knapweed, Spanish-buttons. Phen: Jul-Oct. Hab: Roadsides, disturbed areas. Dist: Native of Europe.
Origin/Endemic status: Europe
Syn: = C, FNA19, G, Il, K1, K3, K4, Mi, NE, NY, Oh3, Pa, SE1; = n/a – RAB; > Centaurea nigra L. var. nigra – F; > Centaurea nigra L. var. radiata DC. – F
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