Photographs: Co. Cork

Common Knapweed (radiate form) Centaurea nigra var. radiata Mínscoth Family: Asteraceae Flowering time: July-September. Perennial. Native. The radiate form of Common Knapweed which has enlarged outer florets. The involucral bracts are blackish-brown and the lower leaves not or only slightly pinnate. Scattered distribution, only found in a few local populations. Similar: Greater Knapweed, Centaurea scabiosa but the leaves are deeply pinnate and involucral bracts are green, the apex blackish

Common Knapweed, Centaurea nigra var radiata