Athyrium filix-femina ‘Dre’s Dagger’ (Lady fern)

6/22/2017 · Garden in the Woods, Framingham, Massachusetts · ≈ 8 × 5″ (20 × 13 cm)

5/22/2010 · Garden in the Woods, Framingham, Massachusetts · ≈ 14 × 10″ (35 × 26 cm)

6/22/2017 · Garden in the Woods, Framingham, Massachusetts · ≈ 4½ × 7″ (12 × 18 cm)

5/22/2010 · Garden in the Woods, Framingham, Massachusetts · ≈ 17 × 12″ (44 × 29 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	Athyrium	From Greek a, “without,” and thurium, “shield,” (or thura, “door”), from the shape of the sori
Species	filix-femina	From the Latin filix, “a fern,” and femina, “feminine,” this taxa is called lady fern from the sporangia which are enclosed or hidden in a manner which is deemed to be feminine

Athyrium filix-femina ‘Dre’s Dagger’ description by Thomas H. Kent, not updated.