Last one looks like netted chain fern, Woodwardia areolata, which can be confused with sensitive fern, Onoclea sensibilis. They are frequently found growing next to each other. The pinnae on the sterile fronds of W. areolata are usually alternate and have serrulate margins. The fertile blades, however, are completely different.
Take a look at the "pinkster" on this recent Botany Photo of the Day. I think that might be your pink flower. Your butterfly is an eastern tiger swallowtail, Papilio glaucus.