| Classification | Equisetaceae: Equisetum | 
| Harvard University Herbaria Barcode(s) | 00021201 | 
| Type Status | Type | 
| Collector | A. A. Eaton | 
| Collector number | 12 | 
| Country | United States of America | 
| State | Massachusetts | 
| Geography | North America: North America (CA, US, MX) (Region): United States of America: Massachusetts: Essex County: Salisbury | 
| Date Collected | 1896-06-** | 
| GUID | http://purl.oclc.org/net/edu.harvard.huh/guid/uuid/e90adbbd-4142-4fb3-ab8b-5e26b864c99e | 
| Harvard University Herbaria Barcode | 00021201 | 
| Herbarium | GH | 
| Family | Equisetaceae | 
| Type Status | Type | 
| Type of | Equisetum arvense f. macrostachya A. A. Eaton | 
| Determination Remarks | [filed under] | 
| Taxon Reference | (for  Equisetum arvense f. macrostachya A. A. Eaton) Fern Bull. 1899. 7: 87. | 
| Sex | not determined | 
| Phenology | NotDetermined | 
| Preparation Type | Sheet | 
| Preparation Method | Pressed |