| Name | Equisetum sylvaticum var. squarrosum A. A. Eaton |
| Authorship | A. A. Eaton |
| Rank | Variety |
| NomenclaturalStatus | NomLeg |
| Placed in | Equisetum sylvaticum Linnaeus |
| Citation | 1901 Fern Bull. 9: 36 |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Equisetum sylvaticum var. squarrosum A. A. Eaton |
| Identification made in | [no date] (1) |
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