| Pteridaceae | |
Pellaea atropurpurea fo. atropurpurea
| | | |
| Pteridaceae | |
Pellaea atropurpurea var. atropurpurea
| | | |
| Pteridaceae | |
Pellaea atropurpurea var. bushii
| Mack. & Bush | Man. Fl. Jackson County 5 | 1902 |
| Pteridaceae | |
Pellaea atropurpurea fo. cristata
| Clute | | ** |
| Pteridaceae | |
Pellaea atropurpurea var. cristata
| Trel. | Rep. (Annual) Missouri Bot. Gard. 12: 77, pl. 34 | 1901 |
| Pteridaceae | |
Pellaea atropurpurea fo. glabella
| (Mett. ex Kuhn) Clute | Ferns in Their Haunts 109, 386 | 1938 |
| Pteridaceae | |
Pellaea atropurpurea unranked glabella
| (Mett. ex Kuhn) F.C. Gates | Trans. Kansas Acad. Sci. 42: 135 | 1939 [1940] |
| Pteridaceae | |
Pellaea atropurpurea var. occidentalis
| E.E. Nelson | Fern Bull. 7: 30 | 1899 |
| Pteridaceae | |
Pellaea atropurpurea var. simplex
| (Butters) C.V. Morton | Leafl. W. Bot. 6(7): 156 | 1951 |