Cirsium arvense (Canada Thistle)...found by Joe while he was doing laps in Prospect Park. Not the typical what's-blooming-now bouquet by Joe, but this one is wearing a handwritten label, which is nice. Canada Thistle, incidentally, isn't from Canada at all. It's from Europe. And people think botanical names are tough. According to Peterson's Field Guide of Eastern/Central Medicinal plants, this thistle (heh) was used by Native Americans as a bowel tonic and dewormer. If I run into any worm problems in the future, I guess I know where to go to harvest it. According to the USDA plant database, it's listed as a noxious weed in most states, but not New York.
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