An annual wildflower/garden weed in Illinois. Base leaves are deeply divided w/ lobes and teeth; leaf size reduces further up thee stem. Flower clusters are terminal w/ numerous flower heads to 1" across. 12 to 20 petal-like ray flowers surround a butter-yellow disk. Found in low, wet woods, fields, and along roadsides.
aka: Butterweed.

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Years ago, I had a volunteer of this plant in one of my many pots, and liked the leaves and blooms. I read online that it was the weediest plant EVER, or something like that, so like a Nervous Nellie, I deliberately planted it out in a difficult spot, and it did not return the next year or in the years since.

This experience reinforced my beliefs that a) few—if any—plants are weedy everywhere, and b) I should keep a new plant in a pot and let it go to seed before I determine whether it's actually weedy. And if it does come back, to keep a close eye on its progress...

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