this is a comma butterfly (Polygonia c-album). I have a book called "Beningfield's Butterflies" (I think that's the name; it is in a box in storage so I can't check) but this is one of the species I remember from it due to its distinctive ragged wings.
The common name and the specific name both relate to the white marking on the underside of the wing. Also, it's one of the few species to have a hyphen as part of its scientific name. ("c-album" means "white C")
