[micrograph_sem] Polypodium appalachianum | [micrograph_sem] Polypodium appalachianum | [micrograph_sem] Polypodium virginianum | [micrograph_sem] Polypodium virginianum | [micrograph_sem] Polypodium virginianum | [photo] Polypodium virginianum | [photo] Polypodium virginianum |