Small annual flowering plant in the family Asteraceae, native to Europe. "Cornflower" is also erroneously used for chicory, and more correctly for a few other Centaurea species; to distinguish C. cyanus from these it is sometimes called Common Cornflower. It may also be referred to as basketflower, though the term properly refers to the Plectocephalus group of Centaurea, which is probably a distinct genus. It is an annual plant growing to 16-35 inches tall, with grey-green branched stems. The leaves are lanceolate, 1–4 cm long. The flowers are most commonly an intense blue colour, produced in flowerheads (capitula) 1.5–3 cm diameter, with a ring of a few large, spreading ray florets surrounding a central cluster of disc florets. The blue pigment is protocyanin, which in roses is red. In the past it often grew as a weed in crop fields, hence its name (fields growing grains such as wheat, barley, rye, or oats are sometimes known as corn fields in the UK). It is now endangered in its native habitat by agricultural intensification, particularly over-use of herbicides, destroying its habitat; in the United Kingdom it has declined from 264 sites to just 3 sites in the last 50 years.
Native to Europe