| Classification | Ophioglossaceae: Botrychium | 
| Harvard University Herbaria Barcode(s) | 00675771 | 
| Type Status | Syntype | 
| Collector | A. A. Eaton | 
| Country | United States of America | 
| State | New Hampshire | 
| Geography | North America: North America (CA, US, MX) (Region): United States of America: New Hampshire: Rockingham County: Kensington | 
| Locality | Kensington N.H. | 
| Date Collected | 1895-07-** | 
| GUID | http://purl.oclc.org/net/edu.harvard.huh/guid/uuid/93183ecb-fe64-4258-9100-198b873998e5 | 
| Harvard University Herbaria Barcode | 00675771 | 
| Herbarium | GH | 
| Previous ownership | [Ex] Herbarium of Alvah A. Eaton | 
| Family | Ophioglossaceae | 
| Type Status | Syntype | 
| Syntype of | Botrychium tenebrosum A. A. Eaton | 
| Determination Remarks | [filed under] | 
| Taxon Reference | (for  Botrychium tenebrosum A. A. Eaton) Fern Bull. 1899. 7: 8. | 
| Family | Ophioglossaceae | 
| Determination | Botrychium tenebrosum A. A. Eaton | 
| Determination Remarks | [label name] [current name] | 
| Annotation Text | Original collection | 
| Family | Ophioglossaceae | 
| Determination | Botrychium tenebrosum A. A. Eaton | 
| Determined by | PZ [P. F. Zika] | 
| Date Determined | 2003 | 
| Annotation Text | Syntype | 
| Preparation Type | Sheet | 
| Preparation Method | Pressed |