| Name | Equisetum fluviatile var. intermedium A. A. Eaton |
| Authorship | A. A. Eaton |
| Rank | Variety |
| Placed in | Equisetum fluviatile Linnaeus |
| Citation | 1901 Working List N. Amer. Pterid. 8: 26 |
| Holdings | 4 Specimens held in the Harvard University Herbaria identified as Equisetum fluviatile var. intermedium A. A. Eaton |
| Identification made in | [no date] (2), 2024 (2) |
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