| Classification | Polygonaceae: Polygonum | 
| Harvard University Herbaria Barcode(s) | 00645737 | 
| Collector | C. H. Knowlton | 
| Country | United States of America | 
| State | Maine | 
| Geography | North America: North America (CA, US, MX) (Region): United States of America: Maine | 
| Locality | T19 ED | 
| Date Collected | 1938-08-11 [Aug 11, 1938] | 
| Project | New England Vascular Plants TCN | 
| GUID | http://purl.oclc.org/net/edu.harvard.huh/guid/uuid/7836c80c-c866-447a-92ce-d006e0e01e7f | 
| Harvard University Herbaria Barcode | 00645737 | 
| Herbarium | NEBC | 
| Family | Polygonaceae | 
| Determination | Polygonum hydropiper Linnaeus | 
| Determination Remarks | [filed under] [current name] | 
| Preparation Type | Sheet | 
| Preparation Method | Pressed |