An annual or biennial plant, cornflower can reach heights of 90 cm (130 ft). It features a stalk with numerous branches, a leaf rosette at the base, and sky-blue flowers throughout the summer.
The therapeutic benefits of cornflower were initially noted in Hildegard of Bingen's writings from the 12th century. Based on the Doctrine of Signatures, which thought a plant's appearance indicated the problems it would cure, the herbalist Pierandrewa Mattioli (1501–1577) later recommended it. Cornflower was used as a remedy for eye conditions because its rich blue color stood for eyes in good health. The plant is called casse-lunnette, which is "break glasses" in French.
It is native to the Near East and naturally occurs in all temperate zones, frequently in cornfields. Just as the blossoms open, they are collected.
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