Athyrium filix-femina var. michauxii (Sprengel) Farwell

Athyrium filix-femina var. michauxii (Sprengel) Farwell is a synonym sensu FNA Ed. Comm., 1993 of:

Athyrium angustum (Willdenow) C. Presl, an accepted species name sensu Hassler, 2014-2024+.