Its spreading and persistent nature make it a serious noxious weed wherever it is growing. The seed capsules explode when dry, shooting the seeds as far as 15 feet. The seeds remain viable in the soil for up to 8 years. Distinguishing Features Up to three feet tall. Leaves are alternate, narrowly linear with smooth margins, one quarter inch wide, and one to four inches long.
Shoots are erect, pale green and unbranched.
Plant and root have milky latex that is damaging to eyes and sensitive skin. If You Spot This Culprit, Report the location to a local land manager or park ranger. Avoid walking on, driving on, or camping in infested areas. Remove all weed seeds from your clothing, shoes, pets, camping gear, and tire treads before moving on. We have reason to believe this criminal weed is hiding out in the surrounding area.