| Dryopteridaceae | |
Polystichum aculeatum var. alfaroi
| Christ | Bull. Herb. Boissier, sér. 2, 4: 903 | 1904 |
| Dryopteridaceae | |
Polystichum aculeatum var. californicum
| (D.C. Eaton) Jeps. | Man. Fl. Pl. Calif. 36 | 1923 |
| Dryopteridaceae | |
Polystichum aculeatum var. distans
| Fée | Mém. Foug. 8: 100 | 1857 |
| Dryopteridaceae | |
Polystichum aculeatum var. dudleyi
| (Maxon) Jeps. | Man. Fl. Pl. Calif. 36 | 1923 |
| Dryopteridaceae | |
Polystichum aculeatum var. gracile
| Fée | Mém. Foug. 8: 100 | 1857 |
| Dryopteridaceae | |
Polystichum aculeatum var. incisum
| Fée | Mém. Foug. 8: 100 | 1857 |
| Dryopteridaceae | |
Polystichum aculeatum var. montevidense
| (Spreng.) Luetzelb. | Estud. Bot. Nordéste 3: 244 | 1923 |
| Dryopteridaceae | |
Polystichum aculeatum var. scopulinum
| (D.C. Eaton) Gilbert | List N. Amer. Pterid. 20 | 1901 |