Athyrium americanum

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 [1]
List Athyrium alpestre var. americanumButters Athyrium alpestre subsp. americanum(Butters) Lellinger Athyrium alpestre var. gaspenseFernald Athyrium alpestre var. typicumFernald 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

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