The cornflower (Centaurea cyanus) is an annual flowering plant of the Asteraceae family native to Europe. In the past, it often grew as a weed in cornfields. Today, the plant is endangered in its original habitat due to the intensification of agriculture, especially the excessive use of herbicides. Centaurea cyanus is an annual plant that grows 60-90 cm high and has green branched stems. The leaves are 1-4 cm long. The flowers are usually intense blue and arranged in flower heads about 2 cm in diameter. The cornflower is native to temperate Europe, mainly England and Ireland.