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Rhaponticum repens (Linnaeus) Hidalgo. Russian Knapweed. Phen: May-Sep. Hab: Disturbed areas. Dist: Native of Eurasia. Reported for VA (FNA), but there is apparently no documentation for its occurrence there; this serious invasive weed is widespread in western North America, east to OH, KY, and AR.

Origin/Endemic status: Eurasia

Syn: = K3, K4, Mi, Hidalgo et al (2006), Susanna & Garcia-Jacas in Kadereit & Jeffrey (2007); = Acroptilon repens (L.) DC. – FNA19, Il, K1; = Centaurea repens L. – C, F, G, GrPl, Oh3

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