Change made
Original	Athyrium alpestre var. americanum differs from var. distentifolium
Changed to	Athyrium distentifolium var. americanum differs from var. distentifolium
Location	Discussion
Category	Nomenclature
Reason	error in text
Volume	2
Authority	Kanchi Gandhi, 5 Aug 2011
Fixed in FNA SMW	yes
Comments

Change made
Original	Athyrium alpestre subsp. americanum (Butters) Lellinger; A. alpestre var. gaspense Fernald; A. americanum (Butters) Maxon; A. distentifolium Tausch ex Opiz subsp. americanum (Butters) Hultén; A. distentifolium var. americanum (Butters) Cronquist
Changed to	Athyrium alpestre (Hoppe) Nylander ex Milde var. americanum Butters, Rhodora 19:204. 1917; A. americanum (Butters) Maxon; A. alpestre subsp. americanum ( Butters ) Lellinger; A. alpestre var. gaspense Fernald; A. distentifolium Tausch ex Opiz subsp. americanum (Butters) Hulten
Location	Synonymy
Category	Synonymy
Reason	Based on invalid name
Volume	2
Authority	Kanchi Gandhi, 5 Aug 2011
Fixed in FNA SMW	yes
Comments

Change made
Original	Athyrium alpestre (Hoppe) Clairville var. americanum Butters, Rhodora. 19: 204. 1917.
Changed to	Athyrium distentifolium Tausch ex Opiz var. americanum (Butters) Boivin, Naturaliste Canad. 93: 272. 1966.
Location	Accepted name
Category	Name, authorship, nomenclature
Reason	Invalid name
Volume	2
Authority	Kanchi Gandhi, 5 Aug 2011
Fixed in FNA SMW	yes
Comments