Reference: Brummitt, R.K. (2001) TDGW - World Geographical Scheme for Recording Plant Distributions, 2nd Edition
- Europe
- Northern Europe
- Denmark, Finland, Føroyar, Great Britain, Iceland, Ireland, Norway, Sweden.
- Middle Europe
- Austria, Belgium, Czechoslovakia, Germany, Hungary, Netherlands, Poland, Switzerland.
- Southwestern Europe
- Southeastern Europe
- Albania, Bulgaria, Greece, Italy, Kriti, Romania, Sicilia, Turkey-in-Europe, Yugoslavia.
- Eastern Europe
- Belarus, Baltic States, Krym, Central European Russia, East European Russia, North European Russia, South European Russia, Northwest European Russia, Ukraine.
- Africa
- Northern Africa
- Algeria, Egypt, Libya, Morocco, Tunisia.
- West Tropical Africa
- Benin, Burkina, Gambia, Ghana, Guinea-Bissau, Guinea, Ivory Coast, Liberia, Mali, Mauritania, Nigeria, Niger, Senegal, Sierre Leone, Togo.
- West-Central Tropical Africa
- Burundi, Cabinda, Central African Republic, Cameroon, Congo, Gabon, Gulf of Guinea Islands, Rwanda, Zaïre.
- Northeast Tropical Africa
- Chad, Ethiopia, Socotra, Somalia, Sudan.
- East Tropical Africa
- South Tropical Africa
- Angola, Malawi, Mozambique, Zambia, Zimbabwe.
- Southern Africa
- Botswana, Cape Provinces, Caprivi Strip, Lesotho, Namibia, KwaZulu-Natal, Free State, Swaziland, Northern Provinces.
- Western Indian Ocean
- Comoros, Mauritius, Madagascar.
- Asia-Temperate
- Siberia
- Altay, Buryatiya, Chita, Irkutsk Krasnoyarsk, Tuva, West Siberia, Yakutiya.
- Russian Far East
- Amur, Kamchatka, Khabarovsk, Kuril Islands, Magadan, Primorye, Sakhalin.
- Middle Asia
- Western Asia
- Afghanistan, Iran, Iraq, Lebanon-Syria, Palestine, Turkey.
- Arabian Peninsula
- China
- China South-Central, Hainan, Inner Mongolia, Manchuria, China North-Central, China Southeast, Tibet.
- Mongolia
- Eastern Asia
- Japan, Korea, Nansei-shoto, Taiwan.
- Asia-Tropical
- Indian Subcontinent
- Assam, Bangladesh, East Himalaya, India, Nepal, Pakistan, Sri Lanka, West Himalaya.
- Indo-China
- Andaman Islands, Cambodia, Laos, Myanmar, Nicobar Islands, Thailand, Vietnam.
- Malesia
- Borneo, Jawa, Lesser Sunda Islands, Malaya, Maluku, Philippines, Sulawesi, Sumatera.
- Papuasia
- Australasia
- Australia
- New South Wales, Northern Territory, Queensland, South Australia, Tasmania, Victoria, Western Australia.
- New Zealand
- New Zealand North, New Zealand South.
- Pacific
- Southwestern Pacific
- Northwestern Pacific
- Caroline Islands, Marianas.
- North-Central Pacific
- Northern America
- Subarctic America
- Aleutian Islands, Alaska, Greenland, Nunavut, Northwest Territories, Yukon.
- Western Canada
- Alberta, British Columbia, Manitoba, Saskatchewan.
- Eastern Canada
- Labrador, New Brunswick, Newfoundland, Nova Scotia, Ontario, Prince Edward Isle, Québec.
- Northwestern U.S.A.
- Colorado, Idaho, Montana, Oregon, Washington, Wyoming.
- North-Central U.S.A.
- Illinois, Iowa, Kansas, Minnesota, Missouri, North Dakota, Nebraska, Oklahoma, South Dakota, Wisconsin.
- Northeastern U.S.A.
- Connecticut, Indiana, Maine, Massachusetts, Michigan, New Hampshire, New Jersey, New York, Ohio, Pennsylvania, Rhode Islands, Vermont, West Virginia.
- Southwestern U.S.A.
- Arizona, California, Nevada, Utah.
- South-Central U.S.A.
- Southeastern U.S.A.
- Alabama, Arkansas, Delaware, Florida, Georgia, Kentucky, Louisiana, Maryland, Mississippi, North Carolina, South Carolina, Tennessee, Virginia, District of Columbia.
- Mexico
- Mexico Central, Mexico Northeast, Mexico Gulf, Mexico Northwest, Mexico Southwest, Mexico Southeast.
- Southern America
- Central America
- Belize, Costa Rica, El Salvador, Guatemala, Honduras, Nicaragua, Panama.
- Caribbean
- Bahamas, Cuba, Dominican Republic, Haiti, Jamaica, Leeward Islands, Puerto Rico, Trinidad-Tobago, Windward Islands.
- Northern South America
- French Guiana, Guyana, Suriname, Venezuela.
- Western South America
- Bolivia, Colombia, Ecuador, Galápagos, Peru.
- Brazil
- Brazil West-Central, Brazil Northeast, Brazil Southeast, Brazil North, Brazil South.
- Southern South America
- Argentina Northeast, Argentina Northwest, Paraguay, Uruguay.
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