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Diffuse Knapweed

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Diffuse Knapweed
Centaurea diffusa
 
Rosette
Leaves have finely divided lobes.
Adult
It is an annual or a short-lived perennial averaging one to two feet tall.
Flower

Flowers are white to rose in color. Diffuse knapweed differs from squarrose knapweed in that toothed flower bracts are straight rather than arched outward. It blooms throughout summer.
Weed Infestation

Native to Eurasia, diffuse knapweed inhabits dry rangeland, roadsides, field edges, and waste areas. Knapweed's release chemical substances into the soil that inhibit the growth of competing vegetation.
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