Louisiana iris hybrids (also Iris breuicaulis, Iris giganticaerulea) have dark green, sword-like leaves and rhizomatous roots. They grow 2 to 4 feet tall and bear 3- to 4-inch-long flowers of white, cream, yellow, bronze, pink, red, blue, purple, or near black. These spring flowers are often cut for flower arrangements. Louisiana iris hybrids are clumping, spreading, or upright perennials that can be used as background or specimen plants. They are also useful in a mass planting.