Wondering if anyone can tell me what these are. I've been unable to identify them from the web or field guides. I thought maybe it was Yarrow, but the leaves don't look the same as the pictures I've see of them. Am I missing something. I live in NE Oklahoma and they are really common plants, growing on the side of the road abundantly, even in the seams of my driveway! Any help is appreciated

Thanks,

ernestoneb

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