Reference: Brummitt, R.K. (2001) TDGW - World Geographical Scheme for Recording Plant Distributions, 2nd Edition
Continental: Europe
Regional: Northern Europe
Denmark, Finland, 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
Azores, Canary Islands, Cape Verde, Madeira.
Regional: West Tropical Africa
Nigeria, Senegal (doubtful).
Regional: West-Central Tropical Africa
Burundi, Cameroon, Gulf of Guinea Islands, Rwanda, Zaïre.
Regional: Northeast Tropical Africa
Eritrea, Ethiopia, Somalia, Sudan.
Regional: East Tropical Africa
Regional: South Tropical Africa
Angola, Malawi, Mozambique, Zambia, Zimbabwe.
Regional: Southern Africa
Botswana, Cape Provinces, Lesotho, Namibia, KwaZulu-Natal, Free State, Swaziland, Northern Provinces.
Regional: Western Indian Ocean
Continental: Asia-Temperate
Regional: Siberia
Altay, Buryatiya, Chita, Irkutsk Krasnoyarsk, Tuva, West Siberia, Yakutiya.
Regional: Russian Far East
Amur, Kamchatka, Khabarovsk, Kuril Islands, 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
Regional: China
China South-Central, Inner Mongolia, Manchuria, China North-Central, Qinghai, China Southeast, Tibet, Xinjiang.
Regional: Mongolia
Regional: Eastern Asia
Continental: Asia-Tropical
Regional: Indian Subcontinent
Assam, Bangladesh, East Himalaya, Nepal, Pakistan, West Himalaya.
Regional: Indo-China
Myanmar, Thailand, Vietnam.
Regional: Malesia
Continental: Northern America
Regional: Subarctic America
Alaska, Northwest Territories, Yukon.
Regional: Western Canada
Alberta, British Columbia, Manitoba, Saskatchewan.
Regional: Eastern Canada
Regional: Northwestern U.S.A.
Colorado, Montana, Oregon, Washington, Wyoming.
Regional: North-Central U.S.A.
Illinois, Iowa, Kansas, Minnesota, Missouri, North Dakota, Nebraska, Oklahoma, South Dakota, Wisconsin.
Regional: Northeastern U.S.A.
Connecticut, Indiana, Maine, Massachusetts, Michigan, New Hampshire, New Jersey, New York, Ohio, Pennsylvania, Rhode Islands, Vermont, West Virginia.
Regional: Southwestern U.S.A.
Arizona, California, Nevada, Utah.
Regional: South-Central U.S.A.
Regional: Southeastern U.S.A.
Alabama, Arkansas, Florida, Georgia, Kentucky, Louisiana, North Carolina, South Carolina, Tennessee, Virginia, District of Columbia.
Regional: Mexico
Mexico Central, Mexico Northeast, Mexico Gulf, Mexico Northwest, Mexico Southwest, Mexico Southeast.
Continental: Southern America
Regional: Central America
Costa Rica, El Salvador, Guatemala, Honduras, Nicaragua, Panama.
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, Chile South, Paraguay, Uruguay.