Most of the contaminated seed was either cleaned, destroyed or exported. No ST plants have been documented as growing in the U.S. however, general surveys continue. They have narrow leaves and a diffusely fibrous root system. Leaves are numerous, emerging, from the base forming a tussock. They are tightly rolled, needle like, and stiff with small serrations.
Leaves appear brownish-green in spring and fall, and tend to be bleached yellow in winter.
Reproduction is by seeds only, which are easily disseminated. Seeds may germinate throughout all seasons and persist in the soil for 13 years. If you find a suspect, mark the location and take a sample of the plant to your county extension or State Department of Agriculture agent. It is anticipated that Serrated Tussock will first appear in areas where contaminated seed was planted and it will be easiest to recognize in unmowed areas.