Dryopteris spinulosa var. intermedia (Muhlenberg ex Willdenow) Underwood

Dryopteris spinulosa var. intermedia (Muhlenberg ex Willdenow) Underwood is a synonym sensu FNA Ed. Comm., 1993 of:

Dryopteris intermedia (Muhlenberg ex Willdenow) A. Gray subsp. intermedia, an accepted subspecies name sensu Hassler, 2014-2024+.