Athyrium filix-femina subsp. cyclosorum (Ruprecht) C. Christensen
Athyrium filix-femina subsp. cyclosorum (Ruprecht) C. Christensen is a synonym sensu FNA Ed. Comm., 1993 of:
Athyrium filix-femina var. cyclosorum (Ruprecht) T. Moore, an accepted variety name sensu FNA Ed. Comm., 1993.