greene said:Where is the rest of the plant? Did you take more photos? Is that a flower pot in the lower part of the picture?
It was found at a nature preserve in Chicago, near wetter soil (wet-mesic). Unfortunately this is the only photo I have. If I remember correctly it has very tiny white flowers in this large panicled flower structure. The flowers are kind of spurge like, and I'm pretty sure it's not a native, though.