George, I think your plant is Cup Plant - same genus - Silphium, but the species is perfoliatum. Note the leaf shape in one of the photos Dawn attached, which are more of a cut leaf type, and then check the leaves on the attached photo of S. perfoliatum and compare them to your 2nd photo. The leaves on S. perfoliatum are attached at the stem, forming a cup shape. Silphiums are very good wildlife plants for birds, butterflies, and insects. Susan Here is a link that might be useful: Silphium perfoliatum aka Cup Plant

I think christie is right. It does look more like ironweed. Here is a link that might be useful: Ironweed

Tall Bellflower, American Bellflower ⇢ Campanulastrum americanum

Maybe another species? multiflorum? For some reason I cannot direct link to Calscape so you will have to search the species. https://www.anniesannuals.com/plants/view/?id=3362 http://calscape.org/Dichelostemma-multiflorum-()