Position in a system
| system | Vitae - living organisms |
| domain | Eukaryota Whittaker & Margulis, 1978 - lifeforms with nucletic cells |
| superregnum | Bikonta - bikonts |
| Corticata | |
| Archaeplastida | |
| kingdom | Plantae Haeckel - plants |
| divisio | Monilophyta Cantino et Donoghue - horsetails |
| class | Polypodiopsida Cronquist, Takht. & Zimmerm. |
| order | Polypodiales Link |
| family | Woodsiaceae (Diesl) Herter |
| genus | Woodsia R. Br. - cliff fern |
| species | Woodsia scopulina D.C. Eat. - Rocky Mountain Woodsia |
| subspecies | Woodsia scopulina subsp. appalachiana (T.M.C. Taylor) Windham - Appalachian Cliff Fern |
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