| Family | Scientific Name | Common Name | Habitat | Distribution | Image |
|---|---|---|---|---|---|
| Polypodiaceae | Polypodium ×incognitum | Eastern Hybrid Rockcap Fern | This is the triploid hybrid of our two species. | ||
| Polypodiaceae | Polypodium appalachianum | Appalachian Rockcap Fern, Appalachian Rock Polypody | Moist rocks at low to high elevations, especially in ravines, on north-facing outcrops, and in other moist sites, rarely epiphytic on tree trunks. | NL (Newfoundland) west to e. ON, south to n. GA and n. AL; nearly restricted to the Appalachian Mountains. |  |
| Polypodiaceae | Polypodium virginianum | Common Rockcap Fern, Common Rock Polypody | Moist rocks. | NL west to NT, south to NC, GA, AL, and AR; Greenland. |  |