Blue-Flag Iris
Scientific name: Iris versicolor
This native perennial is found growing in wet soil or standing water.
Leaves
Blue-green leaves are sword shaped and up to 2 feet long and 1 inch wide.
Flowers
Blue flowers in May to June.
Habitat
Grows in medium to wet humusy soils, in full sun to part shade. This iris may be found in shallow standing water in moist shoreline soils.
Similar Species
There is also a yellow flag iris (Iris pseudacorus).
More on Flowers and Grasses in Lewisboro