Tough, fast-growing rhizomatous perennial. Wind and drought-resistance give it high weed potential. Foliage is strap-shaped and leathery. Branching stems bear a succession of individual flat short-lived iris-like flowers. The 3 larger petals each have a brown and orange blotch at the base. Flower stalks are perennial – they make new flowers year after year. It self seeds freely. Commonly used in landscaping. A new and emerging weed in Ithaca Creek. Pronunciation: dye-EE-teez BYE-kull-lur

Photo: Robert Whyte