Irish wildflowers BSBI map

Knapweed, Centaurea nigra, Minscoth
Photographs: Co. Cork

Common Knapweed / Hardhead
Centaurea nigra
Minscoth
Family: Asteraceae

Flowering time: July-September. Perennial. Native.

Flowers are red-purple on erect stems, the involucral bracts blackish-brown. Stalked lower leaves are oblong, sometimes pinnate, the upper leaves are stalkless, undivided. Slightly hairy plant. Variable. There is a rayed form Centaurea nigra var. radiata with enlarged outer florets.

Abundant on roadsides, grasslands and waste ground.

Similar:Greater Knapweed, Centaurea scabiosa Large purple flowers, found on calcareous grasslands.

Knapweed, Centaurea nigra, Minscoth

Knapweed, Centaurea nigra, Minscoth
Knapweed, Centaurea nigra, Minscoth

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