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Project Noah Nature School
About 5' 6" tall. Along a park trail.
Canada thistle has smaller and paler flowers, and is not commonly found in the region
This looks like milk thistle: noxious, invasive weed in the Midwest and a threat to biodiversity. On the upside, milk thistle has a long history of uses in herbal medicine
Spotted on May 2, 2012
Submitted on May 2, 2012
