|Common Name:||Spotted knapweed|
|Method of Transportation:||Vehicles, in hay and on/through animals.|
|Habitat/Range:||Open areas with well-drained soils such as grass-lands, roadsides, right-of-ways and open forests. Tolerant to dense shade.|
Spotted knapweed (Centaurea biebersteinii) is a very competitive weed of dry open sites. It displaces desirable forage and native plant species reducing the landscape carrying capacity for livestock and wildlife.
Spotted knapweed grows up to 1.5 m tall and has purple (occasionally white) flowers found at the ends of branches. The flowerhead has black-tipped bracts ("scales") that give the plants a spotted appearance. It can act like a biennial or short-lived perennial. It has hairy, deeply-cut leaves that become smaller towards the top of the plant.
The Northwest Invasive Plant Council (NWIPC) is inviting proposals from persons or companies specializing in invasive plant management to...