| Northern Europe | Denmark, Finland, Great Britain, Ireland, Norway, Sweden |
| Middle Europe | Austria, Belgium, Czechoslovakia, Germany, Hungary, Netherlands, Poland, Switzerland |
| Southwestern Europe | Corse, France, Portugal, Sardegna, Spain |
| Southeastern Europe | Albania, Bulgaria, Greece, Italy, Kriti, Romania, Sicilia, Turkey-in-Europe, Yugoslavia |
| Eastern Europe | Belarus, Baltic States, Central European Russia, East European Russia, North European Russia, South European Russia, Northwest European Russia, Ukraine |
| Siberia | Altay, Buryatiya, Irkutsk, Krasnoyarsk, West Siberia, Yakutiya |
| Middle Asia | Kazakhstan, Kirgizstan, Tadzhikistan, Uzbekistan |
| Caucasus | North Caucasus, Transcaucasus |
| Western Asia | Afghanistan, Cyprus, East Aegean Is., Iran, Iraq, Lebanon-Syria, Palestine, Turkey |
| China | China South-Central, Manchuria, China North-Central, Qinghai, China Southeast, Tibet, Xinjiang |
| Indian Subcontinent | East Himalaya, Nepal, Pakistan, West Himalaya |
| Western Canada | British Columbia |
| Eastern Canada | New Brunswick, Newfoundland, Ontario, Québec |
| Northwestern U.S.A. | Montana, Oregon, Washington |
| North-Central U.S.A. | Illinois, Minnesota, Missouri, Wisconsin |
| Northeastern U.S.A. | Connecticut, Indiana, Maine, Massachusetts, Michigan, New Hampshire, New Jersey, New York, Ohio, Pennsylvania, Rhode Island, Vermont, West Virginia |
| Southwestern U.S.A. | California |
| South-Central U.S.A. | New Mexico |
| Southeastern U.S.A. | Arkansas, Kentucky, Maryland, North Carolina, Tennessee, Virginia |