| Name | Thelypteris spinulosa var. intermedia (Muhlenberg ex Willdenow) Nieuwland |
| Authorship | (Muhlenberg ex Willdenow) Nieuwland |
| Rank | Variety |
| Placed in | Thelypteris spinulosa (O. F. Müller) Nieuwland |
| Holdings | 5 Specimens held in the Harvard University Herbaria identified as Thelypteris spinulosa var. intermedia (Muhlenberg ex Willdenow) Nieuwland |
| Identification made in | [no date] (5) |