Native to:
Afghanistan,
Alaska,
Alberta,
Arizona,
Arkansas,
Assam,
British Columbia,
California,
Chile Central,
China North-Central,
China South-Central,
China Southeast,
Colorado,
Connecticut,
Delaware,
East Himalaya,
Idaho,
Illinois,
India,
Indiana,
Inner Mongolia,
Iowa,
Japan,
Jawa,
Kamchatka,
Kazakhstan,
Kentucky,
Khabarovsk,
Kirgizstan,
Korea,
Kuril Is.,
Labrador,
Maine,
Manitoba,
Maryland,
Massachusetts,
Mexico Northwest,
Michigan,
Minnesota,
Montana,
Myanmar,
Nebraska,
Nepal,
Nevada,
New Brunswick,
New Guinea,
New Hampshire,
New Jersey,
New Mexico,
New York,
Newfoundland,
North Carolina,
Northwest Territorie,
Nova Scotia,
Ohio,
Ontario,
Oregon,
Pakistan,
Pennsylvania,
Philippines,
Primorye,
Prince Edward I.,
Qinghai,
Québec,
Rhode I.,
Sakhalin,
Saskatchewan,
South Dakota,
Sri Lanka,
Tadzhikistan,
Taiwan,
Tennessee,
Texas,
Thailand,
Tibet,
Turkmenistan,
Utah,
Uzbekistan,
Vermont,
Vietnam,
Virginia,
Washington,
West Himalaya,
West Virginia,
Wisconsin,
Wyoming,
Xinjiang,
Yukon
Introduced into:
Austria,
Baltic States,
Czechoslovakia,
Denmark,
France,
Germany,
Great Britain,
Ireland,
Italy,
Netherlands,
Norway,
Poland,
Romania,
Sweden,
Switzerland