Sonchus arvensis
Encyclopedia
Sonchus arvensis is a medicinal plant. It is an invasive species in the Great Lakes
Great Lakes
The Great Lakes are a collection of freshwater lakes located in northeastern North America, on the Canada – United States border. Consisting of Lakes Superior, Michigan, Huron, Erie, and Ontario, they form the largest group of freshwater lakes on Earth by total surface, coming in second by volume...

region and was first sited in 1865.

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