Weed class: monitor list
Why Is It a Noxious Weed?
This plant is on the monitor list. Please contact its sponsor Dick Jacobson to report locations or for more information.
How would I identify it?
Featherhead knapweed is a perennial herbaceous plant, growing up to 2 feet.
Flowerheads have fringed bracts at its base that each have a brown feather-like tip. Flowers heads are 3/4 inch tall. Flowers are pink to purple pink with a white center. The outer ring of ray flowers are enlarged.
Leaves are narrow, linear to lance shape with variable margins.
Fruit Seed Description
Seeds are around 1/8 inch long and have a ring of bristles on one end (papus).
How Does it Reproduce?
Plants spread by lateral roots and by seed.