| Name | Equisetum arvense var. polystachyon A. A. Eaton |
| Authorship | A. A. Eaton |
| Rank | Variety |
| NomenclaturalStatus | NomLeg |
| Placed in | Equisetum arvense Linnaeus |
| Citation | 1899 Fern Bull. 7: 88 |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Equisetum arvense var. polystachyon A. A. Eaton |
| Identification made in | [no date] (1) |