Opuntia Mill.

Native to:

Alabama, Alberta, Argentina Northeast, Argentina Northwest, Argentina South, Arizona, Arkansas, Aruba, Bolivia, Brazil Northeast, Brazil South, Brazil Southeast, Brazil West-Central, British Columbia, California, Colombia, Colorado, Connecticut, Costa Rica, Cuba, Delaware, District of Columbia, Dominican Republic, Ecuador, El Salvador, Florida, Galápagos, Georgia, Guatemala, Haiti, Honduras, Idaho, Illinois, Indiana, Iowa, Jamaica, Kansas, Kentucky, Leeward Is., Louisiana, Manitoba, Maryland, Masachusettes, Mexico Central, Mexico Gulf, Mexico Northeast, Mexico Northwest, Mexico Southeast, Mexico Southwest, Michigan, Minnesota, Mississippi, Missouri, Montana, Nebraska, Netherlands Antilles, Nevada, New Hampshire, New Jersey, New Mexico, New York, Nicaragua, North Carolina, North Dakota, Ohio, Oklahoma, Ontario, Oregon, Panamá, Paraguay, Pennsylvania, Peru, Puerto Rico, Saskatchewan, South Carolina, South Dakota, Tennessee, Texas, Trinidad-Tobago, Uruguay, Utah, Venezuela, Venezuelan Antilles, Virginia, Washington, West Virginia, Windward Is., Wisconsin, Wyoming

Introduced into:

Albania, Algeria, Andaman Is., Angola, Ascension, Austria, Bahamas, Baleares, Bangladesh, Benin, Bermuda, Bulgaria, Canary Is., Cape Provinces, Cape Verde, Cayman Is., Central European Rus, China South-Central, China Southeast, Corse, Czechoslovakia, East Aegean Is., Eritrea, Ethiopia, Fiji, France, Free State, Gambia, Great Britain, Greece, Guinea, Gulf of Guinea Is., Hainan, India, Italy, Kenya, Korea, Kriti, KwaZulu-Natal, Lesotho, Libya, Madeira, Mauritius, Morocco, Myanmar, Namibia, Netherlands, New Caledonia, Nicobar Is., Northern Provinces, Portugal, Rodrigues, Rwanda, Réunion, Sardegna, Saudi Arabia, Senegal, Sicilia, Somalia, South China Sea, Spain, St.Helena, Sudan, Swaziland, Switzerland, Tanzania, Tunisia, Turks-Caicos Is., West Himalaya, Western Sahara, Yemen, Yugoslavia, Zaïre