Setosa flowers are generally small, with narrow petals and light bluish-purple shades. They are distinct due to their short, broad sepal structure.
Versicolor blooms are violet-blue with yellow accents. Medium-sized petals make them recognizable as Blue Flag Irises in wetlands.
Virginica flowers have slender, long petals with rich purple hues. They usually grow near rivers and marshes in North America.