WordNet sense 1 (annual of Mediterranean to Portugal having hairy stems and minutely spiny-toothed leaves and large heads of yellow flowers):

blessed thistle, Cnicus benedictus

WordNet sense 2 (perennial of mountains of Iran and Iraq; cultivated for its fragrant rose-pink flowers):

Centaurea imperialis

WordNet sense 3 (Asian plant widely grown for its sweetly fragrant pink flowers; sometimes placed in genus Centaurea):

Amberboa moschata, Centaurea moschata