- Continental: Europe
- Regional: Northern Europe (introduced?)
- Denmark, Finland, Føroyar, Great Britain, Iceland, 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, South European Russia, Northwest European Russia, Ukraine.
- Continental: Africa
- Regional: Northern Africa
- Algeria, Egypt, Libya, Morocco, Tunisia.
- Regional: West-Central Tropical Africa
- Regional: Northeast Tropical Africa
- Regional: South Tropical Africa
- Regional: Southern Africa
- Regional: Middle Atlantic Ocean
- Continental: Asia-Temperate
- Regional: Siberia
- Regional: Caucasus
- North Caucasus, Transcaucasus.
- Regional: Western Asia
- East Aegean Islands, Iran, Iraq, Lebanon-Syria, Palestine, Sinai, Turkey.
- Regional: Arabian Peninsula
- Gulf States, Oman, Saudi Arabia, Yemen.
- Regional: China
- China South-Central, China Southeast.
- Regional: Eastern Asia
- Continental: Asia-Tropical
- Regional: Indian Subcontinent
- Assam, Pakistan, West Himalaya.
- Continental: Australasia
- Regional: Australia
- Regional: New Zealand
- Chatham Islands, Kermadec Islands, New Zealand North, New Zealand South.
- Continental: Pacific
- Regional: Southwestern Pacific
- Regional: South-Central Pacific
- Easter Islands, Pitcairn Islands, Tuamotu.
- Regional: North-Central Pacific
- Continental: Northern America
- Regional: Western Canada
- Alberta, British Columbia, Manitoba, Saskatchewan.
- Regional: Eastern Canada
- New Brunswick, Newfoundland, Nova Scotia, Ontario, Prince Edward Island, Québec.
- Regional: Northwestern U.S.A.
- Colorado, Idaho, Montana, Oregon, Washington.
- Regional: North-Central U.S.A.
- Illinois, Iowa, North Dakota, Wisconsin.
- Regional: Northeastern U.S.A.
- Connecticut, Indiana, Maine, Massachusetts, Michigan, New Hampshire, New Jersey, New York, Ohio, Pennsylvania, Rhode Island, Vermont, West Virginia.
- Regional: Southwestern U.S.A.
- Arizona, California, Nevada, Utah.
- Regional: South-Central U.S.A.
- Regional: Southeastern U.S.A.
- Alabama, Delaware, Kentucky, Louisiana, Maryland, North Carolina, Tennessee, Virginia.
- Regional: Mexico
- Mexico Central, Mexico Northeast, Mexico Gulf, Mexico Southwest, Mexico Southeast.
- Continental: Southern America
- Regional: Central America
- Regional: Caribbean
- Bermuda, Haiti, Jamaica, Venezuelan Antilles.
- Regional: Northern South America
- Regional: Western South America
- Bolivia, Colombia, Ecuador, Peru.
- Regional: Brazil
- Brazil Southeast, Brazil South.
- Regional: Southern South America
- Argentina Northeast, Argentina South, Argentina Northwest, Chile Central, Chile North, Juan Fernández Islands, Paraguay.
- Continental: Antarctic
- Regional: Subantarctic Islands
- Note: Grey script indicates introduced occurrences.
References: Brummitt, R.K. 2001. TDWG – World Geographical Scheme for Recording Plant Distributions, 2nd Edition
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