Common Oak Fern, Northern Oak Fern, Western Oak Fern

Gymnocarpium disjunctum

Synonyms: Dryopteris linnaeana, Gymnocarpium dryopteris, Gymnocarpium dryopteris var. disjunctum, Lastrea dryopteris, Phegopteris dryopteris, Polypodium dryopteris, Thelypteris dryopteris