this is the flower of the one I know as iron weed, medicinal. I had some growing back in the east.
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Yep, I know it by iron weed also, several by that name. The latin name is Vernonia gigantea. I've read it has medicinal properties but I've not read of anyone using it since the early 1800s. It blooms here in late summer, septemberish. It really stands out on the road sides, about 6ft tall.
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