Russian Knapweed (Centaurea repens L.)
Russian Knapweed is a perennial that grows 18 to 36 inches tall with many branches. Shoots and leaves are a sage color and covered in dense gray hairs. Single urn-shaped flowers appear at the tips and flower out to be a purple, pink, or white color. It is toxic to horses if eaten.
Chemical mechanical control must be combined to effectively control Russian Knapweed.