Canada's Plant Hardiness Site

Athyriaceae family
Athyrium distentifolium var. americanum (Butters) B.Boivin
En: American alpine lady fern, alpine lady fern;
Fr: athyrie alpestre, athyrie alpestre sous-espece americaine

• [=Athyrium alpestre (Hoppe) Rylands ex T.Moore subsp. americanum (Butters) Lellinger]
• [=Athyrium alpestre (Hoppe) Rylands ex T.Moore var. americanum Butters - basionym]
• [=Athyrium alpestre (Hoppe) Rylands ex T.Moore var. gaspense Fernald]
• [=Athyrium alpestre (Hoppe) Rylands ex T.Moore var. typicum Fernald, nom. inval.]
• [=Athyrium americanum (Butters) Maxon]
• [=Athyrium distentifolium Tausch ex Opiz subsp. americanum (Butters) Hultén]
• [=Athyrium distentifolium Tausch ex Opiz var. americanum (Butters) Cronquist 1969, nom. illeg. isonym]
• [=Phegopteris alpestris (Hoppe) Mett. var. americana (Butters) Jeps.]
• [=Phegopteris rhaetica Watt. var. americana (Butters) Farw.]