Spinulose Wood Fern
Spinulose wood fern, Dryopteris carthusiana, is found in many places in the Eastern and Central United States. It is a common fern.
iNaturalist map of D. carthusiana
D. carthusiana is very similar to Evergreen Wood Fern, D. intermedia.
D. carthusiana is not an evergreen fern, but it does stay green well after the first frost.
Shelton Open Space, Shelton, CT, USA
Shelton Open Space, Shelton, CT, USA
Picture details the trait of Spinulose Wood Fern, the bottom most pinna and the lower inner pinnule. The lower inner pinnule is longer than the other pinnules.
Kent, CT