Dunce-Nettle
Cirsium muticum Michx.

Cirsium muticum is a species in the Asteraceae family, native to central and eastern Canada and the United States. It is known by several common names, including Dunce-Nettle, swamp thistle, marsh thistle, and horsetops. The species was first described in 1803 by Michx.
Description
Cirsium muticum is a North American plant species belonging to the Asteraceae family. It is found in regions such as Labrador, Newfoundland, Manitoba, New Brunswick, Nova Scotia, Ontario, Prince Edward Island, Quebec, and Saskatchewan in Canada, as well as in the United States in areas like Vermont, Alabama, Arkansas, Connecticut, Delaware, Florida, Georgia, Illinois, Indiana, Iowa, and others. It is commonly referred to as Dunce-Nettle, along with other names like swamp thistle and marsh thistle.
Other common names
Dunce-NettleHorsetopsSwamp Thistle
Distribution
Labrador · Newfoundland · Manitoba · New Brunswick · Nova Scotia · Ontario · Prince Edward Island · Quebec · Saskatchewan · Saint Pierre and Miquelon · Vermont-US · Alabama · Arkansas · Connecticut · Delaware · Florida · Georgia · Illinois · Indiana · Iowa · Kentucky · Louisiana · Maine · Maryland · Massachusetts · Michigan · Minnesota · Missouri · New Hampshire · New Jersey
Synonyms
Cnicus muticusCirsium muticum f. muticumCnicus glutinosusCarduus muticus var. muticusCnicus muticus var. muticusCirsium bigelowiiCarduus muticus var. albiflorusCnicus muticus var. monticolaCarduus muticus var. subpinnatifidusCirsium muticum var. monticolaCirsium muticum var. muticumCirsium muticum var. subpinnatifidumCnicus muticus var. alpicolaCnicus muticusCarduus muticusCnicus glaberCirsium muticum f. lactiflorumCirsium muticum f. monticola


