Eurasia; Newfoundland to Alaska, south to Nova Scotia, New England, Florida and Texas; both native and introduced" (Reed, 1964).
Note the rasping stem and leaves in whorls of 6 to 8.
There are 477 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 |