- Continental: Europe
- Regional: Northern Europe
- Denmark, Finland,Føroyar, Great Britain, Ireland, Norway, Sweden.
- Regional: Middle Europe
- Austria, Belgium, Czechoslovakia, Germany, Hungary, Netherlands, Poland, Switzerland.
- Regional: Southwestern Europe
- Baleares, Corse, France, Portugal, Sardegna, Spain.
- Regional: Southeastern Europe
- Albania, Bulgaria, Greece, Italy, Kriti, Romania, Sicilia, Turkey-in-Europe, Yugoslavia.
- Regional: Eastern Europe
- Belarus, Baltic States, Krym, Central European Russia, East European Russia, North European Russia, South European Russia, Northwest European Russia, Ukraine.
- Continental: Africa
- Regional: Northern Africa
- Algeria, Egypt, Libya, Morocco, Tunisia.
- Regional: Macaronesia
- Regional: West-Central Tropical Africa
- Regional: Northeast Tropical Africa
- Regional: Southern Africa
- Cape Provinces, Lesotho, Namibia, Free State, Northern Provinces.
- Continental: Asia-Temperate
- Regional: Siberia
- Regional: Russian Far East
- Amur, Magadan, Primorye, Sakhalin.
- Regional: Middle Asia
- Kazakhstan, Kirgizstan, Turkmenistan, Tadzhikistan, Uzbekistan.
- Regional: Caucasus
- North Caucasus, Transcaucasus.
- Regional: Western Asia
- Afghanistan, Cyprus, East Aegean Islands, Iran, Iraq, Lebanon-Syria, Palestine, Sinai, Turkey.
- Regional: Arabian Peninsula
- Gulf States, Saudi Arabia, Yemen.
- Regional: China
- Hainan, Inner Mongolia, China North-Central, Qinghai, Tibet, Xinjiang.
- Regional: Mongolia
- Continental: Asia-Tropical
- Regional: Indian Subcontinent
- Bangladesh, Nepal, Pakistan, West Himalaya.
- Continental: Northern America
- Regional: Western Canada
- Alberta, British Columbia, Manitoba, Saskatchewan.
- Regional: Eastern Canada
- New Brunswick, Nova Scotia, Ontario, Prince Edward Island, Québec.
- Regional: Northwestern U.S.A.
- Colorado, Idaho, Montana, Oregon, Washington, Wyoming.
- Regional: North-Central U.S.A.
- Illinois, Iowa, Minnesota, North Dakota, South Dakota, Wisconsin.
- Regional: Northeastern U.S.A.
- Connecticut, Maine, Massachusetts, Michigan, New Hampshire, New Jersey, New York, Ohio, Pennsylvania, Rhode Island.
- Regional: Southwestern U.S.A.
- Regional: South-Central U.S.A.
- Regional: Southeastern U.S.A.
- Maryland, North Carolina, Virginia, District of Columbia.
- Continental: Southern America
- Regional: Southern South America
- Argentina Northeast, Argentina South.
- Note:Grey script indicates introduced occurrences.
References:Brummitt, R.K. 2001. TDWG – World Geographical Scheme for Recording Plant Distributions, 2nd Edition |