Cornflowers, Centaurea cyanus, bachelor's button, or bluebottle as it is also called originated in Hungary may be more than just that pretty blue flower you see in your neighbor's garden. It has been said that Centaurea cyanus may have usefulness from its seeds as well as its leaf or petal.
Botanical Name: Centaurea cyanus
Common Names: Bluebottle, Bluebow, Hurtsickle, Blue Cap
Source: Mountain Rose Herbs