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Athyrium americanum
	On the slopes of Naches Peak, Washington state
	Close-up of frond
Conservation status
	; Apparently Secure (NatureServe)
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Division:	Polypodiophyta
Class:	Polypodiopsida
Order:	Polypodiales
Suborder:	Aspleniineae
Family:	Athyriaceae
Genus:	Athyrium
Species:	A. americanum
Binomial name
	Athyrium americanum; (Butters) Maxon
Synonyms
	List Athyrium alpestre var. americanum Butters; Athyrium alpestre subsp. americanum (Butters) Lellinger; Athyrium alpestre var. gaspense Fernald; Athyrium alpestre var. typicum Fernald; Athyrium distentifolium subsp. americanum (Butters) Hultén; Athyrium distentifolium var. americanum (Butters) B.Boivin; Phegopteris alpestris var. americana (Butters) Jeps.; Phegopteris rhaetica var. americana (Butters) Farw.; ;

Athyrium americanum, the American alpine lady fern, is a species of fern in the family Aspleniaceae.^[2] It is native to the Russian Far East, subarctic North America, and the west to west-central United States.^[1] It occurs at higher altitudes and latitudes than Athyrium filix-femina, the common lady fern.^[2]

References

^ ^a ^b "Athyrium americanum (Butters) Maxon". Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 4 July 2022.
^ ^a ^b Mason, Herbert Louis (January 1957). A Flora of the Marshes of California. Berkeley and Los Angeles: University of California Press. p. 27. ISBN 9780520014336.

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[26100-2-1] "Athyrium americanum (Butters) Maxon". Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 4 July 2022.

[Anthem-2] Mason, Herbert Louis (January 1957). A Flora of the Marshes of California. Berkeley and Los Angeles: University of California Press. p. 27. ISBN 9780520014336.

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