Blue flag

Blue flag is a flower plant, just another name for a violet-flowered iris. It grows in marsh lands and wet meadows. It belongs to the genus Iris, and the family Iridaceae. The larger blue flag (Iris versicolor) and the slender blue flag (Iris prismatica) are notable among its several species.

Blue flag is also a European award for beaches, marinas, and sustainable boating tourism operators. It is given on the basis of several criteria including safety and cleanliness.