A perennial plant native to Europe, Canada thistle is classified as an invasive weed across the United States. Most common in disturbed waste areas, barrens and fields, it also grows in wetlands such as wet prairies or along stream banks with rising and falling water levels.
About this Author
A freelance writer, Judy Wolfe has owned Prose for the Pros, a freelance writing business, since 2006. She's been an inveterate traveler since 1961 and draws on her travel experiences to provide articles for such websites as Chincoteague Island Vacations and Berlin Dude. Wolfe holds a Bachelor of Arts in literature from California State University at Pomona.