Greater knapweed
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Centaurea scabiosa or Greater Knapweed is a perennial plant of the genus Centaurea. It is native to Europe and bears purple flower heads. Greater knapweed is found growing in dry grasslands, hedgerows and cliffs on lime-rich soil.
Photo: Common_knapweed_(Centaurea_nigra)_-_geograph.org.uk_-_492672.jpg photo by Kate Jewell