Brown-eyed susan, "Rudbeckia hirta", Asteraceae.
"Silphium perfoliatum", Asteraceae.
The erect pods are the fruits of butterfly milkweed. When they mature they open naturally (dehiscence). The seeds are primarily dispersed by wind. Some pods in the photo have opened and seeds are visible as white fluffy stuff! ("Asclepias tuberosa", Apocynaceae).
