*Centaurea nigrescens Willdenow. Phen: Jul-Oct. Hab: Roadsides, disturbed areas. Dist: Native of Europe. This species is increasing rapidly in the n. VA Piedmont. Poindexter, Weakley, & Denslow (2011) report the naturalization of C. nigrescens in Alleghany Co. NC.
Origin/Endemic status: Europe
Other Comments: C. transalpina Schleicher ex A.P. de Candolle was also reported for VA by Kartesz (1999).
Synonymy: = FNA19, Il, K3, K4, Mi, NE, NY, Pa, Va; = Centaurea dubia Suter – C, Oh3, SE1, W, nomen invalidum; = n/a – RAB; > Centaurea dubia Suter ssp. vochinensis (Bernh. ex Rchb.) Hayek – G; > Centaurea nigrescens Willd. – F, K1; > Centaurea transalpina Schleich. ex DC. – F, K1; > Centaurea vochinensis Bernh. ex Rchb. – F