A common weed of sidewalks and paved places (Terrell & Peterson, 2009). "Naturalized from the Old World; Quebec to Minnesota and South Dakota, and southward" (Reed, 1964).
There are 252 records in the project database.
GA | AL | WA | FR | CL | MO | HO | BA | BC | HA | CE | PG | AA | CV | CH | SM | KE | QA | CN | TA | DO | WI | SO | WO |