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Blueweed is native to Southern Europe and West-Central Asia. It escaped from cultivation in North America as an ornamental and is now widely distributed throughout. Also commonly called Viper’s bugloss, ‘bugloss’ is Greek for ox-tongue, which describes the shape and roughness of the leaves. Blueweed invades pastures and rangelands, replacing forage plants; thus, infestations are associated with some economic losses.