Synonyms
Phegopteris rhaetica var. americana (Butters) Farw.
Athyrium alpestre var. gaspense Fernald
Athyrium alpestre var. americanum Butters
Athyrium alpestre subsp. americanum (Butters) Lellinger
Athyrium distentifolium subsp. americanum (Butters) Hultén
Phegopteris alpestris var. americana (Butters) Jeps.
Athyrium alpestre var. typicum Fernald
Athyrium distentifolium var. americanum (Butters) B.Boivin