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Spotted Knapweed
Centaurea maculosa
Photo by Dr. John Meade, weed scientist emeritus
Rutgers NJAES Cooperative Extension
Spotted knapweed is a serious weed of rangelands in the far west but in New Jersey it is a roadside weed. It flowers late and furnishes local color in the summer time. It has been on the increase in recent years.
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