Dryopteris dilatata auct. non (Hoffm.) A. Gray
Dryopteris dilatata (Hoffm.) A. Gray ssp. americana (Fisch.) Hultén
Dryopteris spinulosa (O.F. Müll.) Watt var. dilatata auct. non (Hoffm.) Underw.
Dryopteris expansa (C. Presl) Fraser-Jenkins & Jermy
Alpine buckler fern, northern buckler-fern, spreading wood fern
[An article has not been written yet.]
Dryopteris assimilis S. Walker
Dryopteris dilatata auct. non (Hoffm.) A. Gray
Dryopteris dilatata (Hoffm.) A. Gray ssp. americana (Fisch.) Hultén
Dryopteris spinulosa (O.F. Müll.) Watt var. dilatata auct. non (Hoffm.) Underw.
Dryopteris dilatata auct. non (Hoffm.) A. Gray
Dryopteris dilatata (Hoffm.) A. Gray ssp. americana (Fisch.) Hultén
Dryopteris spinulosa (O.F. Müll.) Watt var. dilatata auct. non (Hoffm.) Underw.
9/22/2023 · Goodell Brook Falls, Monson, Maine · ≈ 10 × 6″ (24 × 16 cm) 
| Kingdom | Plantae | Plants, but not fungi, lichens, or algae (from Stearn's Botanical Latin) |
| Subkingdom | Tracheobionta | Vascular plants—plants with a “circulatory system” for delivering water and nutrients |
| Division | Pteridophyta | Ferns |
| Class | Filicopsida | “Leptosporangiate” (has to do with how their spores form) ferns—includes most ferns |
| Order | Polypodiales | Polypod ferns |
| Family | Dryopteridaceae | Wood ferns (about 70% of the ferns) |
| Genus | Dryopteris | From Greek dryas, “oak,” and pteris, “fern,” in reference to the presence of some species of wood ferns in woodland areas populated with oaks |
| Species | expansa |
Dryopteris expansa description by Thomas H. Kent, not updated.
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