Polypodium appalachianum Haufler & Windham. Phen: Jun-Oct. Hab: Moist rocks at low to high elevations, especially in ravines, on north-facing outcrops, and in other moist sites, rarely epiphytic on tree trunks. Dist: NL (Newfoundland) west to e. ON, south to n. GA and n. AL; nearly restricted to the Appalachian Mountains.
Origin/Endemic status: Native
Taxonomy Comments: The chromosome complement of Polypodium appalachianum can be symbolized as AA. It is one parent of P. virginianum.
Synonymy: = FNA2, K1, K3, K4, NE, NY, Pa, Tn, Va, Haufler, Windham, & Rabe (1995); < Polypodium virginianum L. – C, F, RAB, Sf, W, WV; < Polypodium vulgare L. – S13; < Polypodium vulgare L. var. virginianum (L.) Eaton – G