Photos from Montana's Noxious Weeds,
by Monica Pokorny & Roger Sheley.
Used with permission from
Montana State University Extension.
Photos from Montana Weed Control Association
Toxicity: Toxic. Livestock, dogs, cats and humans.
Growth Habit: herbaceous perennial found in wet areas in water up to 10 inches deep. Plants are 3 to 4 feet tall with long, linear, dark green leaves.
Leaves: long, linear, dark green leaves, leaves emerge from the ground in fan-like arrangement. Similar to a common garden iris. Leaves have a raised midrib and are erect with the upper part arching.
Stem: stems consist of flower stalks.
Flower: several flowers are born on erect flower stalks.
Reproduction: can spread by rhizomes and seeds.
Habitat: Wetlands and riparian areas.