Iris versicolor - Northern blue flag
Best grouped in sunny areas of ponds or water gardens. It also may be grown in moist border areas.
Iris veriscolor is a clump-forming Iris that grows well in moist conditions such as marshes, swamps, and wet meadows. It has blue-green leaves and bluish-purple flowering stalks with bold purple veining.
"Blue flag iris is a beautiful alternative to the northeaster invader yellow flag iris." Growing the Northeast Garden
Height: 2 ft
Sun: Sun to partial shade
Water: Medium to wet
Bloom color: Violet blue
Bloom time: May to June