Thelypteris spinulosa var. americana (Fischer ex Kunze) Weatherby

Thelypteris spinulosa var. americana (Fischer ex Kunze) Weatherby is a synonym sensu Hassler, 2014-2024+ of:

Dryopteris campyloptera (Kunze) Clarkson, an accepted species name sensu FNA Ed. Comm., 1993.