Nigel Cattlin / Greater knapweed (Centaurea cyanus). Berkshire, England, UK. July.

Dave Bevan / Six spot burnet (Zygaena filipendulae) nectaring on a Cornflower (Centaurea cyanus), Norfolk, England, UK, July.

Martin Grimm/ BIA / Common Sunflower (Helianthus annuus) and Cornflower (Centaurea cyanus) field, Hesse, Germany

Martin Grimm/ BIA / Common Sunflower (Helianthus annuus) and Cornflower (Centaurea cyanus) field, Hesse, Germany

Bruno D'Amicis / Red poppies, cornflowers, daisies and other ruderal species colonize abandoned cultivated fields. Gran Sasso National Park. Central Apennines, Abruzzo, Italy, June.

Bruno D'Amicis / Red poppies, cornflowers, daisies and other ruderal species colonize abandoned cultivated fields. Gran Sasso National Park, Central Apennines, Abruzzo, Italy, June.

Sandra Bartocha / Low angle view of Cornflowers (Centaurea cyanus) Seeland, Denmark

Michael W. Richards / Static shot of long grass containing Cornflowers (Centaurea cyanus) and Common poppies (Papaver rhoeas), with a farmhouse in the background, Somerset, England, UK, August.

Ann & Steve Toon / Wildflowers, including corn marigold (Glebionis segetum), cornflowers (Centaurea cyanus) and corn chamomile (Anthemis arvensis), being grown for seed by Landlife, Fir Tree Farm, Merseyside, UK, June.

Ann & Steve Toon / Wildflowers, including poppies (Papaver rhoeas), corn marigold (Glebionis segetum), cornflowers (Centaurea cyanus) and corn chamomile (Anthemis arvensis), being grown for seed by Landlife, Fir Tree Fa...

Ann & Steve Toon / Wildflowers, including poppies (Papaver rhoeas), corn marigold (Glebionis segetum), cornflowers (Centaurea cyanus) and corn chamomile (Anthemis arvensis), being grown for seed by Landlife, Fir Tree Fa...

Ann & Steve Toon / Wildflowers, including poppies (Papaver rhoeas), corn marigold (Glebionis segetum), cornflowers (Centaurea cyanus) and corn chamomile (Anthemis arvensis), being grown for seed by Landlife, Fir Tree Fa...