Alnus Mill.

Native to:

Alabama, Alaska, Albania, Alberta, Aleutian Is., Algeria, Altay, Amur, Argentina Northwest, Arizona, Arkansas, Assam, Austria, Baltic States, Bangladesh, Belarus, Belgium, Bolivia, British Columbia, Bulgaria, Buryatiya, California, Central European Rus, China North-Central, China South-Central, China Southeast, Chita, Colombia, Colorado, Connecticut, Corse, Costa Rica, Cyprus, Czechoslovakia, Delaware, Denmark, District of Columbia, East European Russia, East Himalaya, Ecuador, El Salvador, Finland, Florida, France, Georgia, Germany, Great Britain, Greece, Greenland, Guatemala, Honduras, Hungary, Idaho, Illinois, Indiana, Inner Mongolia, Iowa, Iran, Ireland, Irkutsk, Italy, Japan, Kamchatka, Kazakhstan, Kentucky, Khabarovsk, Korea, Krasnoyarsk, Krym, Kuril Is., Labrador, Lebanon-Syria, Libya, Louisiana, Magadan, Maine, Maine, Manchuria, Manitoba, Maryland, Massachusetts, Massachusetts, Mexico Central, Mexico Gulf, Mexico Northeast, Mexico Northwest, Mexico Southeast, Mexico Southwest, Michigan, Michigan, Minnesota, Mississippi, Missouri, Mongolia, Montana, Morocco, Myanmar, Nansei-shoto, Nepal, Netherlands, Nevada, New Brunswick, New Hampshire, New Hampshire, New Jersey, New Mexico, New York, New York, Newfoundland, North Carolina, North Caucasus, North Dakota, North European Russi, Northwest European R, Northwest Territorie, Norway, Nova Scotia, Nunavut, Ohio, Oklahoma, Ontario, Oregon, Pakistan, Palestine, Panamá, Pennsylvania, Pennsylvania, Peru, Poland, Portugal, Primorye, Prince Edward I., Québec, Rhode I., Romania, Sakhalin, Sardegna, Saskatchewan, Sicilia, South Carolina, South European Russi, Spain, Sweden, Switzerland, Taiwan, Tennessee, Texas, Thailand, Tibet, Transcaucasus, Tunisia, Turkey, Turkey-in-Europe, Ukraine, Utah, Venezuela, Vermont, Vermont, Vietnam, Virginia, Washington, West Himalaya, West Siberia, West Virginia, Wisconsin, Wyoming, Yakutskiya, Yugoslavia, Yukon

Introduced into:

Argentina Northeast, Argentina South, Azores, Chile Central, Chile South, Free State, Hawaii, New Zealand North, New Zealand South