| Harvard University Herbaria Barcode(s) | 00022674 | 
| Type Status | Isotype | 
| Collector | J. Macoun | 
| Collector number | 4179 | 
| Country | Canada | 
| State | British Columbia | 
| Geography | North America: North America (CA, US, MX) (Region): Canada: British Columbia | 
| Locality | Griffin Lake | 
| Date Collected | 1889-08-03 | 
| GUID | http://purl.oclc.org/net/edu.harvard.huh/guid/uuid/77118702-358d-43bc-b104-0656fd927f90 | 
| Harvard University Herbaria Barcode | 00022674 | 
| Herbarium | GH | 
| Type Status | Isotype | 
| Isotype of | Potamogeton subdentatus nothovar. petiolatus Hagström | 
| Taxon Reference | (for  Potamogeton subdentatus nothovar. petiolatus Hagström) Kongl. Svenska Vetensk. Acad. Handl. 1916. 55(5): 201. | 
| Determination | Potamogeton praelongus Wulfen | 
| Determined by | B. Boivin | 
| Determination Remarks | [current name] | 
| Sex | not determined | 
| Phenology | NotDetermined | 
| Preparation Type | Sheet | 
| Preparation Method | Pressed |