one blue cornflower isolate on a white background

cornflower knapweed isolated flower closeup blue nature blossom floral bloom plant petal background wildflower beautiful flora wild field herb decoration fresh bluebottle garden season summer centaurea botany color outdoor stem bud macro medicine healthy medical herbal head single one stamen bluet country detail rustic sunny pretty white botanical isolate genus 350 600 species herbaceous thistle-like flowering plants family asteraceae