| Classification | Equisetaceae: Equisetum | 
| Barcode(s) | 00674515 | 
| Type Status | Syntype | 
| Collector | A. A. Eaton | 
| Collector number | 47 | 
| Country | United States of America | 
| State | Massachusetts | 
| Geography | North America: North America (CA, US, MX) (Region): United States of America: Massachusetts: Essex County: Amesbury | 
| Date Collected | 1897-05-30 [May 30, 1897] | 
| Habitat | Sandy pools ["Deep recently deposited sandbanks of Merrimack River . . . In and about little pools of water"; from protologue] | 
| Project | New England Vascular Plants TCN | 
| GUID | http://purl.oclc.org/net/edu.harvard.huh/guid/uuid/84a090b6-be02-422d-b08d-e2758a02b49a | 
| Harvard University Herbaria Barcode | 00674515 | 
| Herbarium | NEBC | 
| Previous ownership | Fern Bulletin Distribution | 
| Family | Equisetaceae | 
| Type Status |  Syntype | 
| Syntype of |  Equisetum fluviatile var. intermedium A. A. Eaton | 
| Verified by | Kittredge, Walter Tobey | 
| Date Determined | 2024 | 
| Determination Remarks |  [filed under] | 
| Annotation Text | = E. fluviatile | 
| Taxon Reference | (for  Equisetum fluviatile var. intermedium A. A. Eaton) Working List N. Amer. Pterid. 1901. 8: 26. | 
| Family | Equisetaceae | 
| Determination |  Equisetum fluviatile Linnaeus | 
| Determined by | Kittredge, Walter Tobey | 
| Date Determined | 2024 | 
| Determination Remarks |  [current name] | 
| Family | Equisetaceae | 
| Determination |  Equisetum fluviatile var. intermedium A. A. Eaton | 
| Determination Remarks |  [label name] | 
| Preparation Type | Sheet | 
| Preparation Method | Pressed |