Wildflowers of New York

Black Knapweed

A photographic collection and brief reference to help identify Wildflowers found in New York

Black Knapweed
- Centaurea nigra


Daisy Family
Naturalized alien

Black Knapweed flowers can be either rayed or not. The ones I see in St. Lawrence County seem to be all rayed. From a distance these may be mistaken for thistle flowers. Leaves are alternate, lanceolate but lower ones are often toothed. The flower bracts give the hardhead a darker color than other knapweeds.

Found: Field, roadsides, waste places - dry sunny areas
Height:1 - 3 feet
June - Sept bloom time

Black Knapweed

Black Knapweed

Black Knapweed