Herbaceous biennial that can act as a perennial in Wisconsin. Grows to be 1-4’ tall with warty bumps along stem as well as hairs on stem and leaves.
- Invades grasslands, fields, pastures, roadsides, and disturbed areas.
- Capable of invading high-quality areas and creating monoculture stands.
- Plants may contain allelopathic compounds (chemicals toxic to surronding vegetation).
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