Iris cristata ‘Powder Blue Giant’ is a delicate light blue with gold crests on the falls. The flowers stand only 6 inches tall, but they are 3 inches wide, which is huge for such a low growing plant. Iris cristata is found in floodplains from Maryland to Oklahoma. It thrives in shade, spreads rapidly, and is resistant to deer and rabbits. The name iris was taken from the Greek goddess of the rainbow to symbolize the many colors of this flower. The classic Fleur de Lys, which has been a symbol of royalty throughout history, was an adaptation of the iris flower.