Cornflower (Centaurea cyanus) is native to Europe, where it is considered a weed in fields. However, it is also used as an ornamental flower because of its intense blue flowers, and has become naturalized in North America and Australia. Blue cornflower has been used to flavor teas and to reduce ocular inflammation. Some preliminary studies indicate that cornflower may have anti-inflammatory properties, and blue cornflower did reduce the recurrence of urinary tract stones in one clinical trial. However, high-quality clinical studies need to be conducted before blue cornflower can be recommended for any use.
In European phytotherapy, Centaurea cyanus flower heads are used to treat minor ocular (eye) inflammations.
Asteraceae (Family), bachelor's button, basket flower, bluebottle, bluebow, blue cap, blue cornflower, bluet (French), boutonniere flower, Centaurea cyanus, Centaurea montana, Centaurea scabopsa L., eau de Casselunettes (French), hurt sickle, hurtsickle, protocyanin, scaly cornflower.
These uses have been tested in humans or animals. Safety and effectiveness have not always been proven. Some of these conditions are potentially serious, and should be evaluated by a qualified healthcare provider.
Urolithiasis (urinary tract stones)
Cornflower flowers may be helpful in preventing the recurrence of urinary tract stones. However, more studies are needed in this area to confirm these results.