A wildflower in central Illinois, I thought it was a Heath Aster, but believe I may have been mistaken.
Flowers are small, appx a half inch across, many flowers; blooms in the fall. Plant may attain several feet in height.
Stem, leaf, and flower

Flower detail

It's probably White Panicle Aster (Symphyotrichum lanceolatum), but Aster (Symphyotrichum praealtum) is another possibility.

I'll check the leaves closer tomorrow.

I think it's the Willowleaf.
Thanks Kent.

looks like daisy fleabane grows along roads

Wrong season for that. Fleabane is more spring, photo from deep fall.