Weed class: monitor list
Native to: Asia, Europe and Northern Africa
Why Is It a Noxious Weed?
This plant is on the monitor list. Please contact the State Noxious Weed Board to report locations or for more information.
How would I identify it?
Annual herbaceous plant growing 5-12 inches tall, upright or lying flat to the ground.
Flowers are in dense spikes with 3 bracts at the base of each flower. Bracts thin and more or less translucent, with a green rib, trip of bract sharp to touch. Flowers white or yellow, with 4 to 5 petals joining to form a tube.
Leaves are linear, 1/3 to 1 inch long, growing in whorls of 4.
Stems are four-angled.
Where does it grow?
Documented in Idaho and California. In Idaho, it was found growing in open ponderosa pine forest with hawthorn, downy brome, yellow starthistle and hedge parsley.