Centaurea stoebe

Centaurea stoebe spotted knapweed

Plant grows in the wild/spontaneouslyPlant is invasive in PA Add to MyPlants View Locations

Although the flowerheads of knapweed look similar to those of thistles, knapweeds do not have any prickles on any plant parts. The spotted knapweed's flowers can be either pink, purple, or white.  The flower bracts supporting the flowerheads have black triangular tips.  This knapweed is introduced from Europe and has become invasive.

Commonly naturalized  in dry woods, fields, roadsides, and shale barrens.

Present throughout the state.

Wetland code: Not classified

Flowers June to October.

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Centaurea stoebe spotted knapweed

Plant grows in the wild/spontaneouslyPlant is invasive in PA
Add to MyPlants View Locations
Centaurea stoebe gallery
Plant Life-Form
biennial or perennial forb
Common Names
spotted knapweed