Biennial or short-lived perennial; multiple stems with several coming from each rosette. Leaves are oblong and wider at the tip. Leaves and stems are blue-gray in color. Flowers are purple, tips of flower heads are urn-shaped. Bracts are usually black, thus the name “spotted”.
Roadsides, gravel bars, pasutres, grasslands.
- Mature Height:
- Target Audience:
- R-o-W and river folks, powerlines
- ODA Listing:
- Plant Look Alikes:
- Other knapweeds, cornflower, bachelor’s buttons
- Plant Impacts:
- Forms dense stands on any open ground; can form monotypic stands
- Plant Links:
- King County Spotted Knapweed Info
- CWMA Actions List:
- volunteer response, contractor response