Northern America Eastern Canada Ontario North-Central U.S.A. Illinois Iowa Kansas Minnesota Missouri Nebraska Oklahoma South Dakota Wisconsin Northeastern U.S.A. Connecticut Indiana Masachusettes Michigan New Jersey New York Ohio Pennsylvania Rhode I. West Virginia South-Central U.S.A. Texas Southeastern U.S.A. Alabama Arkansas Delaware District of Columbia Florida Georgia Kentucky Louisiana Maryland Mississippi North Carolina South Carolina Tennessee Virginia Introduced into Asia-Temperate Caucasus North Caucasus Transcaucasus Middle Asia Tadzhikistan Asia-Tropical Indian Subcontinent West Himalaya Europe Middle Europe Austria Belgium Czechoslovakia Germany Hungary Poland Northern Europe Denmark Southeastern Europe Bulgaria Italy Romania Northern America Northeastern U.S.A. Vermont South-Central U.S.A. New Mexico

Northern America Eastern Canada Ontario North-Central U.S.A. Illinois Iowa Kansas Minnesota Missouri Nebraska Oklahoma South Dakota Wisconsin Northeastern U.S.A. Connecticut Indiana Masachusettes Michigan New Jersey New York Ohio Pennsylvania Rhode I. West Virginia South-Central U.S.A. Texas Southeastern U.S.A. Alabama Arkansas Delaware District of Columbia Florida Georgia Kentucky Louisiana Maryland Mississippi North Carolina South Carolina Tennessee Virginia Introduced into Asia-Temperate Caucasus North Caucasus Transcaucasus Middle Asia Tadzhikistan Asia-Tropical Indian Subcontinent West Himalaya Europe Middle Europe Austria Belgium Czechoslovakia Germany Hungary Poland Northern Europe Denmark Southeastern Europe Bulgaria Italy Romania Northern America Northeastern U.S.A. Vermont South-Central U.S.A. New Mexico