Yellowflag Iris
(Iris pseudacorus)

 

Photos from Montana's Noxious Weeds, revised ed.
by Monica Pokorny & Roger Sheley.

Used with permission from
Montana State University Extension.

Toxic	Stem	Infestation
Flower	Seeds	Root

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.

Roots: rhizomes

Seeds:

Reproduction: can spread by rhizomes and seeds.

Habitat: Wetlands and riparian areas.

Biological Controls:

Herbicides: Glyphosate

Video Supplied By Montana Weed Control Association