KENAI PENINSULA COOPERATIVE WEED MANAGEMENT AREA

Spotted Knapweed

       

Spotted Knapweed (Centaurea biebersteinii) Sunflower family

If found report immediately! 235-8177 ext. 5

Biennial plant that grows up to 3 feet tall from a stout taproot. Basal rosettes have deeply lobed gray-green leaves. Flower heads pink-purple, consisting of ray florets only, solitary at the end of stem branches.Involucral bracts are topped with dark comb-like fringe giving a spotted appearance.

Spreads only by seed. Adapted to well-drained soils. Responsible for millions of dollars in economic loss and environmental damage in the western United States.

Not known to occur in Kenai Peninsula; however, found in Anchorage, Valdez, and numerous locations in Southeast Alaska. Look for this plant in natural and unnaturally disturbed areas.

More information

Distribution

Alaska State Parks U.S. Fish and Wildlife Service Kenai Peninsula Borough National Park Service Kenai Watershed Forum UAF Cooperative Extension Service