Cornflower, Centaurea dealbata 'John Coutts', Close up detail of mauve coloured flower growing outdoor.

Persian Cornflower, Centaurea dealbata, Side view of one pink flower with fringed petals against light background.

Persian Cornflower, Centaurea dealbata, Side view of one pink flower with fringed petals against pale blue sky.

Perennial cornflower, Knautia macedonica, Side view of one open magenta, maroon flower with soft focus stem against a light blue white sky.

Cornflower, Perennial cornflower, Knautia macedonica, A single purple flower.

Cornflower, Perennial cornflower, Centaurea montana.

Cornflower, Perennial cornflower, Centaurea montana.

Cornflower, Perennial cornflower, Centaurea montana.

Cornflower, Perennial cornflower, Centaurea montana.

Cornflower, Perennial cornflower, Knautia macedonica.

Cornflower, Perennial cornflower, Knautia macedonica.

Cornflower, Perennial cornflower, Knautia macedonica.