Azolla filiculoides Lam. (New World: Alaska, Argentina Northeast, Argentina Northwest, Argentina South, Arizona, Arkansas, Bolivia, Brazil North, Brazil Northeast, Brazil South, Brazil Southeast, Brazil West-Central, British Columbia, California, Chile Central, Chile North, Chile South, Colombia, Colorado, Costa Rica, Dominican Republic, Ecuador, El Salvador, Galápagos, Guatemala, Guyana, Honduras, Illinois, Iowa, Kansas, Mexico Central, Mexico Gulf, Mexico Northeast, Mexico Northwest, Mexico Southeast, Mexico Southwest, Minnesota, Missouri, Nebraska, Nevada, New Mexico, Nicaragua, Oklahoma, Oregon, Panamá, Paraguay, Peru, Texas, Tristan da Cunha, Uruguay, Utah, Venezuela, Venezuelan Antilles, Washington, Wisconsin; Introduced into: Albania, Assam, Austria, Baltic States, Bangladesh, Belgium, Bulgaria, Canary Is., Cape Provinces, China Southeast, Czechoslovakia, Denmark, France, Free State, Germany, Great Britain, Greece, Hawaii, Hungary, India, Ireland, Italy, Japan, Jawa, Korea, KwaZulu-Natal, Lesotho, Malaya, Morocco, Mozambique, Namibia, Nansei-shoto, Nepal, Netherlands, New York, Northern Provinces, Pakistan, Palestine, Poland, Portugal, Romania, Sardegna, Sicilia, Spain, Swaziland, Sweden, Tadzhikistan, Taiwan, Turkey, Turkey-in-Europe, West Himalaya, Yugoslavia, Zimbabwe as per POWO)

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Azolla pinnata subsp. asiatica R.M.K.Saunders & K.Fowler (China to Tropical & Subtropical Asia: Assam, Bangladesh, Borneo, China North-Central, China South-Central, China Southeast, East Himalaya, India, Japan, Jawa, Korea, Lesser Sunda Is., Malaya, Maluku, Manchuria, Myanmar, Nansei-shoto, Nepal, New Guinea, Pakistan, Philippines, Sri Lanka, Sulawesi, Sumatera, Taiwan, Thailand, Vietnam, West Himalaya as per POWO)

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Salvinia molesta D. S. Mitch. (Introduced) (S. & SE. Brazil to Argentina: Argentina Northeast, Brazil South, Brazil Southeast; Introduced into: Alabama, Arizona, Arkansas, Austria, Azores, Bangladesh, Belgium, Benin, Borneo, Botswana, Burkina, California, Cameroon, Cape Provinces, Comoros, Connecticut, Corse, Cuba, Denmark, Fiji, Florida, France, Georgia, Germany, Ghana, Guatemala, Hawaii, Hungary, India, Italy, Ivory Coast, Jawa, Kansas, Kenya, KwaZulu-Natal, Leeward Is., Lesotho, Louisiana, Malawi, Malaya, Mali, Maryland, Mauritania, Mexico Northwest, Mississippi, Missouri, Mozambique, Namibia, Nepal, Netherlands, New Caledonia, New Guinea, New Mexico, New South Wales, Nigeria, North Carolina, Northern Provinces, Northern Territory, Oklahoma, Oregon, Pakistan, Palestine, Pennsylvania, Philippines, Portugal, Queensland, Senegal, South Australia, South Carolina, Sri Lanka, Swaziland, Taiwan, Tanzania, Texas, Thailand, Trinidad-Tobago, Turkey, Uganda, Vanuatu, Victoria, Virginia, Washington, West Himalaya, Western Australia, Zambia, Zimbabwe as per POWO)

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Salvinia natans All. (Temp. Eurasia to Indo-China, Jawa: Afghanistan, Algeria, Altay, Amur, Assam, Baltic States, Bangladesh, Belarus, Bulgaria, China North-Central, China South-Central, China Southeast, Czechoslovakia, East European Russia, East Himalaya, Germany, Greece, Hainan, Hungary, India, Inner Mongolia, Iran, Iraq, Italy, Japan, Jawa, Kazakhstan, Khabarovsk, Korea, Krym, Lebanon-Syria, Manchuria, Nansei-shoto, Nepal, Netherlands, North Caucasus, Northwest European R, Pakistan, Palestine, Poland, Primorye, Qinghai, Romania, South China Sea, Spain, Taiwan, Thailand, Tibet, Transcaucasus, Tunisia, Turkey, Turkey-in-Europe, Ukraine, Uzbekistan, Vietnam, West Himalaya, West Siberia, Xinjiang, Yugoslavia; Extinct in: Belgium, France, Switzerland; Introduced into: Austria, Cuba, Jamaica, Massachusetts, New York as per POWO)

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Salviniaceae (ferns) with comparative images:
Species, genus & family pages of‎‎‎ Salviniaceae are now with comparative images. On clicking the link of species, one can check the complete details.
May I request you to pl. go through & point out mistakes, if any. I hope this will aid in identification in future. If anybody can send images of other species of this family (for incorporation in the website), if any, or can identify unidentified/ wrongly identified images, it will be really nice. Pl. circulate it widely, for the benefit of all concerned.