Distribution
Austria, Finland (introduced), Germany, Hungary, Italy, Netherlands, Poland, Ukraine, United States of America (introduced)

Native to: Albania, Austria, Baleares, Baltic States, Belarus, Belgium, Bulgaria, Central European Rus, Corse, Cyprus, Czechoslovakia, Denmark, East Aegean Is., East European Russia, France, Germany, Great Britain, Greece, Hungary, Iran, Iraq, Ireland, Italy, Kazakhstan, Kirgizstan, Kriti, Krym, Lebanon-Syria, Madeira, Morocco, Netherlands, North Caucasus, North European Russi, Northwest European R, Norway, Palestine, Poland, Portugal, Romania, Sardegna, Sicilia, South European Russi, Spain, Sweden, Switzerland, Tadzhikistan, Transcaucasus, Turkey, Turkey-in-Europe, Turkmenistan, Ukraine, Uzbekistan, Yugoslavia.
Introduced into: Afghanistan, Alaska, Antipodean Is., Azores, Bolivia, British Columbia, California, Chatham Is., Colombia, Connecticut, Costa Rica, Falkland Is., Finland, Føroyar, Hawaii, Iceland, Idaho, Illinois, India, Indiana, Kentucky, Korea, Kuril Is., Maine, Masachusettes, Michigan, Minnesota, Montana, Myanmar, New Brunswick, New Hampshire, New York, New Zealand North, New Zealand South, Newfoundland, North Carolina, North Dakota, Nova Scotia, Ohio, Ontario, Oregon, Pakistan, Pennsylvania, Québec, Rhode I., Sakhalin, Tasmania, Tennessee, Tristan da Cunha, Uruguay, Utah, Vermont, Victoria, Virginia, Washington, West Virginia, Wisconsin.

Rhizomes short, erect, herbaceous. Leaves: petioles winged, equaling or longer than blades; blades 6-40 × 4-20 mm, bases ± attenuate, apices rounded. Peduncles lax, (3-)5-15(-20) cm. Phyllaries: margins ciliolate, particularly distally, apices obtuse. Ray corollas 4-8(-11) mm. Disc corollas 1.5 mm. Cypselae 1-2 mm. 2n = 18.
Phenology: Flowering spring-summer.
Habitat: Lawns and moist, waste places, roadsides.
Elevation: 0-500+ m
(Flora of North America)