Standing two to three feet tall, the blue flag iris is one of our most elegant wildflowers. It is unmistakable with its sword like leaves and its showy violet flower with its "erect petals and broad, heavily veined, down curved sepals." The blue flag iris will be found where it is wet. Apparently, the blue flag along the Atlantic coast is a different variety; though hard to distinguish, it is smaller with narrower and more grass like leaves. The Blue Flag Iris is considered poisonous.