More recently known as Iris domestica, it is a perennial with bladelike leaves growing from yellowish-orange rhizomes. Flowers in terminal cymes at ends of branches, 1-1/2 to 2-1/2 inches across. Each flower remains open for only a single day. Leaves are nearly identical to those of the garden iris, long and broad. Fruit a pear-shaped capsule about an inch long, that splits open and withers, revealing shiny black seeds, looking very much like a blackberry. The seeds remain attached for many weeks. Start seed indoors in mid-winter after cold treatment. Will self-seed.