Rocky Mountain Iris - I. MissouriensisRocky mountain iris Wild Iris resembles a perfectly shaped miniature domesticated Iris. Wild Iris typically has leaves and flower stalk about a foot tall, with a three inch flower, but it is not uncommon to find Iris growing to two feet tall. As is true of many flowers, color variations exist in Wild Iris, but in our area the range is in shades of blue purple with a rare white flower. Wild Iris is most often found in extensive patches in moist meadows