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Family: asteraceae
Common name(s): Diffuse Knapweed
Synonym(s): Acosta diffusa
Hardiness ratings: USDA zone 3 - 10 
General resources
Links for Centaurea diffusa
- Dave's Garden PlantFiles - Profile page with horticultural basics, and member-contributed photos and comments. (zone 3-10a)
 (2 photos)
- Garden.org - Community-assembled plant profile (1 photo)
- Turner Photographics - Profile of wildflower of the US Pacific Northwest, with botanical description, habitat and distribution, and photo gallery.
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