The Blue Flag Irises occur throughout the United States, from Iris setosa in Alaska, to Iris missouriensis throughout the western states, to Iris versicolor and Iris virginica throughout the eastern states, and Iris tridentata in the southeastern states. Their conspicuous pale blue to deep blue-violet flower coloration characterizes them.

Iris versicolor or Iris versicolour is also commonly known as the blue flag, harlequin blueflag, larger blue flag, northern blue flag, [2] and poison flag, plus other variations of these names, [3] [4] and in Great Britain and Ireland as purple iris.

Noted for its distinct upright habit and striking flowers, Iris versicolor (Blue Flag) is a rhizomatous perennial forming a clump of narrow, upright or gracefully recurving, sword-shaped, blue-green leaves.

Southern blue flag iris is a lovely, delicate iris native to the United States and Canada, from the east coast to the middle states as far west as Texas. The genus name Iris is named after the Greek Goddess of rainbows and the species name refers to the state of Virginia where it is found.

Iris versicolor, or Blue Flag Iris, grows to form nice patches of deep blue flowers and is excellent for naturalizing around ponds, lakeshores, and low, wet areas

Iris veriscolor, commonly called northern blue flag, is a clump-forming iris that is native to marshes, swamps, wet meadows, ditches and shorelines from Manitoba to Nova Scotia south to Virginia, Ohio, Illinois and Minnesota.

The Western blue flag iris is a handsome beardless iris that grows between 1 and 2 feet tall. The flowers are easily identifiable; large purple blossoms with white or sometimes yellowish veins. Depending on the region, the Western blue flag iris will bloom in the late spring to summer.

BLUE FLAG Iris versicolor L. Plant Symbol = IRVE2 Contributed by: USDA NRCS Plant Materials Program Uses This species is primarily utilized for its brightly colored floral display. The root mass of established colonies provides good shoreline protection. Although the …

Larger blue flag iris, is a perennial in the Iridaceae (iris) family native to Canada and the United States spanning south from Nova Scotia into the middle and northeastern United States to Virginia.

In the Garden: Blue Flag Iris steals the show in early summer with its intricate, jewel-toned flowers and its bold, sword-like leaves. The flowers are relished by hummingbirds but deer and other herbivores rarely touch this plant. In addition, the angular seed pods add excellent winter interest.