I'm not sure where my connection with this lovely wildflower began...I think perhaps many years ago when I first learned about
Vincent van Gogh. I love this beautiful little wildflower that I see along the bank when I go canoeing.
Blue flag is also know as liver lily. However, the roots are reported to be poisonous. Blue Flag was the emblem of the royal house of Louis VII of France. The alternate name, fleur-de-lis, is a corruption of the literal translation "flower of Louis".
The iris is the rainbow of the Earth. Iris was goddess of the rainbow and messenger of the gods in the Iliad. That is why the flower, iris, is associated with tidings or messages and good news. The flower name is fitting, given the range of colours displayed by the iris. The name versicolor means "of varied colours". Both the generic and specific names express the variable colour of the wild iris.
Language of Flowers: Iris means "Glad tidings", "Message" or "I have a message for you".
(Taken from: http://www.ontariowildflower.com/lakeedge.htm#loosestrifepurple)