| Name | Osmunda claytoniana var. dubia Grout |
| Authorship | Grout |
| Rank | Variety |
| NomenclaturalStatus | NomLeg |
| Placed in | Osmunda claytoniana Linnaeus |
| Citation | 1901 Working List N. Amer. Pterid. 13, 28 |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Osmunda claytoniana var. dubia Grout |
| Identification made in | [no date] (1) |
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