Spirodela Schleid.

Native to:

Alabama, Albania, Alberta, Altay, Argentina Northeast, Argentina Northwest, Argentina South, Arizona, Arkansas, Austria, Baltic States, Bangladesh, Belarus, Belgium, Belize, Benin, Bolivia, Borneo, Botswana, Brazil North, Brazil Northeast, Brazil South, Brazil Southeast, Brazil West-Central, British Columbia, Bulgaria, Burundi, Buryatiya, California, Cape Provinces, Central African Republic, Central American Pacific Is., Central European Russia, Chad, Chatham Is., Chile Central, China North-Central, China South-Central, China Southeast, Christmas I., Cocos (Keeling) Is., Colombia, Colorado, Congo, Connecticut, Corse, Costa Rica, Cuba, Czechoslovakia, Delaware, Denmark, District of Columbia, Dominican Republic, East European Russia, Ecuador, Egypt, El Salvador, Ethiopia, Fiji, Finland, Florida, France, Free State, Georgia, Germany, Ghana, Great Britain, Greece, Guatemala, Haiti, Hawaii, Honduras, Hungary, Idaho, Illinois, India, Indiana, Inner Mongolia, Iowa, Iran, Ireland, Irkutsk, Italy, Ivory Coast, Jamaica, Japan, Jawa, Kamchatka, Kansas, Kazakhstan, Kentucky, Kenya, Khabarovsk, Korea, Krasnoyarsk, Kriti, Krym, Kuril Is., KwaZulu-Natal, Lebanon-Syria, Leeward Is., Lesser Sunda Is., Louisiana, Madagascar, Madeira, Maine, Malawi, Malaya, Maldives, Maluku, Manchuria, Manitoba, Maryland, Massachusetts, Mauritius, Mexican Pacific Is., Mexico Central, Mexico Gulf, Mexico Northeast, Mexico Northwest, Mexico Southeast, Mexico Southwest, Michigan, Minnesota, Mississippi, Missouri, Montana, Morocco, Mozambique, Nebraska, Nepal, Netherlands, Nevada, New Brunswick, New Caledonia, New Hampshire, New Jersey, New Mexico, New South Wales, New York, New Zealand North, New Zealand South, Nicaragua, Nigeria, Norfolk Is., North Carolina, North Caucasus, North Dakota, North European Russia, Northern Provinces, Northern Territory, Northwest European Russia, Norway, Nova Scotia, Ohio, Oklahoma, Oregon, Palestine, Panamá, Paraguay, Pennsylvania, Peru, Philippines, Poland, Portugal, Primorye, Prince Edward I., Puerto Rico, Qinghai, Queensland, Québec, Rhode I., Romania, Rwanda, Sakhalin, Sardegna, Saskatchewan, Senegal, Sicilia, South Australia, South Carolina, South Dakota, South European Russia, Spain, Sri Lanka, Sudan, Sulawesi, Sumatera, Suriname, Sweden, Switzerland, Taiwan, Tanzania, Tasmania, Tennessee, Texas, Thailand, Tibet, Togo, Transcaucasus, Trinidad-Tobago, Tunisia, Turkey, Turkey-in-Europe, Tuva, Uganda, Ukraine, Uruguay, Utah, Vanuatu, Venezuela, Vermont, Victoria, Vietnam, Virginia, Washington, West Himalaya, West Siberia, West Virginia, Western Australia, Windward Is., Wisconsin, Wyoming, Yakutskiya, Yugoslavia, Zambia, Zaïre, Zimbabwe

Introduced into:

Azores, Canary Is., Guyana

POWO follows these authorities in accepting this name:

• Govaerts, R. & Frodin, D.G. (2002). World Checklist and Bibliography of Araceae (and Acoraceae): 1-560. The Board of Trustees of the Royal Botanic Gardens, Kew.

Flora of West Tropical Africa

• in Linnaea 13: 391 (1839).

CATE Araceae

• Landolt, E.
• Landolt, E. 1998. Lemnaceae The Families and Genera of Flowering Plants.. 4: 264-270
• Royal Botanic Gardens, Kew 2008. World Checklist of Selected Plant Families.

Flora of Tropical East Africa

• Daubs, Monogr. Lemnac.: 8 (1965)
• Hegelm., Lemnac. Monogr.: 147 (1868)
• in Linnaea 13: 391 (1839)