| Name | Osmunda regalis f. anomala (Farwell) S. K. Harris |
| Authorship | (Farwell) S. K. Harris |
| Rank | Forma |
| Placed in | Osmunda regalis var. spectabilis (Willdenow) A. Gray |
| Holdings | 2 Specimens held in the Harvard University Herbaria identified as Osmunda regalis f. anomala (Farwell) S. K. Harris |
| Identification made in | [no date] (2) |
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