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Athyrium
alpestre
ssp. americanum
Frauenfarn, ...
American Alpine Lady Fern
Athyrium alpestre var. americanum, Athyrium alpestre var. gaspense, Athyrium americanum, Athyrium distentifolium ssp. americanum, Athyrium distentifolium var. americanum, Phegopteris rhaetica
Polypodiopsida
Polypodiales
Woodsiaceae
E-Siberia / Amur / Ussuri, Alaska, S-Greenland, Canada (Alberta, British Columbia, Neufundland, Quebec, Yukon), USA (California, Colorado, Idaho, Montana, Nevada, Oregon, Utah, Washington, Wyoming)
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