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Project Noah Nature School
Cirsium arvense
A bloomed Canada Thistle is a difficult weed to get rid of because of how aggressive it can get by infesting crops, pastures, roadsides, pastures, and non crop areas. One plant can take over 3-6 ft in diameter in 1 or 2 years.
Spotted on Sep 3, 2014
Submitted on Sep 3, 2014
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