repens or Centaurea repens
Russian Knapweed is a creeping
perennial weed. Flowers are lavendar. Bracts below the flowers are papery. Russian
Knapweed is a noxious weed that should be aggressively controlled. It is also
toxic to horses.
Compare to Diffuse Knapweed. Diffuse Knapweed
has stiff bracts with bristles on the margins.