Meadow Knapweed

Centaurea x moncktonii

Brown Knapweed

Centaurea jacea

Black Knapweed

Centaurea nigra

Vochin Knapweed

Centaurea nigrescens

Diffuse Knapweed

Centaurea diffusa

Featherhead Knapweed

Centaurea tricocephala

Spotted Knapweed

Centaurea stoebe

Russian Knapweed

Rhaponticum repens

Bighead Knapweed

Centaurea macrocephala

Perennial Cornflower

Centaurea montana