| Name | Equisetum arvense f. macrostachya A. A. Eaton |
| Authorship | A. A. Eaton |
| Rank | Forma |
| NomenclaturalStatus | NomLeg |
| Placed in | Equisetum arvense Linnaeus |
| GUID | urn:lsid:ipni.org:names:294384-2 |
| Citation | 1899 Fern Bull. 7: 87 |
| Holdings | 2 Specimens held in the Harvard University Herbaria identified as Equisetum arvense f. macrostachya A. A. Eaton |
| Identification made in | [no date] (2) |
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