| Classification | Polygonaceae: Polygonum |
| Classification 1 | Polygonaceae: Persicaria |
| Harvard University Herbaria Barcode(s) | 00736111 |
| Collector | C. H. Knowlton |
| Country | United States of America |
| State | Massachusetts |
| Geography | North America: North America (CA, US, MX) (Region): United States of America: Massachusetts: Plymouth County: Mattapoisett |
| Locality | Mattapoisett |
| Date Collected | 1908-08-16 [Aug 16 1908] |
| Project | New England Vascular Plants TCN |
| GUID | http://purl.oclc.org/net/edu.harvard.huh/guid/uuid/70440c08-0c87-4822-a47b-bab76e4a6a59 |
| Harvard University Herbaria Barcode | 00736111 |
| Herbarium | NEBC |
| Family | Polygonaceae |
| Determination | Polygonum hydropiperoides Michaux |
| Determined by | Park, Chong-wook |
| Date Determined | 1990-06-** |
| Determination Remarks | [current name] |
| Family | Polygonaceae |
| Determination | Persicaria hydropiperoides (Michaux) Small |
| Determination Remarks | [filed under] |
| Family | Polygonaceae |
| Determination | Polygonum opelousanum Riddell |
| Determined by | Sorrie, Bruce Alexander |
| Date Determined | 1981-07-24 |
| Preparation Type | Sheet |
| Preparation Method | Pressed |
