Iris versicolor
Also called the wild iris, this plant predominates throughout much of the West. In appearance it looks a lot like your common iris-long, smooth spear-shaped leaves and adorned with a light lavender or bluish-purple flower just a tad smaller in size than your garden varieties. Blue flag is a sociable plant, preferring to grow in bunches rather than by itself. Nothing is more beautiful, indeed, than to walk across an entire meadow during late June and early July.