This was identified by Jim Brock today who was with the group and said P. communis not in area.
Try as I might, I couldn't get an image of this frit just when it opened its wings wide. Nonetheless, enough of the FW is visible to rule out Aphrodite. Photographed along a trail in oak-hickory-tuliptree woodland.
A Great Spangled Fritillary on Common Milkweed at Buck Hill MA.
A male Diana Frittilary butterfly feeding on Purple Coneflowers
The Diana Fritillary is the Arkansas State Butterfly, designated in 2007.
Photographed at Terre Noire Natural Area, Clark County, Arkansas
Neotropic and Double-crested Cormorants showing size differential - Loyola Beach on Baffin Bay