| Lindsaeaceae | |
Lindsaea quadrangularis subsp. antillensis
| K.U. Kramer | Acta Bot. Neerl. 6(2): 194 | 1957 |
| Lindsaeaceae | |
Lindsaea quadrangularis subsp. mexiae
| Mickel | Mem. New York Bot. Gard. 88: 367, f. 173A–C | 2004 |
| Lindsaeaceae | |
Lindsaea quadrangularis var. pallescens
| Sehnem | Fl. Il. Catarin. PTER: 38, pl. 7, f. 3 | 1972 |
| Lindsaeaceae | |
Lindsaea quadrangularis subsp. quadrangularis
| | | |
| Lindsaeaceae | |
Lindsaea quadrangularis subsp. subalata
| K.U. Kramer | Acta Bot. Neerl. 6(2): 190–191, f. 50 | 1957 |
| Lindsaeaceae | |
Lindsaea quadrangularis subsp. terminalis
| K.U. Kramer | Acta Bot. Neerl. 6: 192, f. 49 | 1957 |