| Classification | Polygonaceae: Polygonum |
| Classification 1 | Polygonaceae: Persicaria |
| Harvard University Herbaria Barcode(s) | 00036675 |
| Type Status | Holotype |
| Collector | O. P. Phelps |
| Collector number | 1551 |
| Country | United States of America |
| State | New York |
| Geography | North America: North America (CA, US, MX) (Region): United States of America: New York: Saint Lawrence County: Lisbon |
| Date Collected | 1916-06-25 |
| Habitat | Moist open meadow |
| Container | Flora of Northern New York |
| GUID | http://purl.oclc.org/net/edu.harvard.huh/guid/uuid/be10a810-3211-492c-a612-65a81e773544 |
| Harvard University Herbaria Barcode | 00036675 |
| Herbarium | GH |
| Family | Polygonaceae |
| Type Status | Holotype |
| Holotype of | Polygonum amphibium f. simile Fernald |
| Verified by | Kittredge, Walter Tobey |
| Date Determined | 2019 |
| Determination Remarks | [filed under] |
| Taxon Reference | (for Polygonum amphibium f. simile Fernald) Rhodora 1946. 48: 49. |
| Family | Polygonaceae |
| Determination | Persicaria amphibia (Linnaeus) Delarbre |
| Determined by | Kittredge, Walter Tobey |
| Date Determined | 2019 |
| Determination Remarks | [current name] |
| Family | Polygonaceae |
| Determination | Polygonum natans f. hartwightii (A. Gray) Stanford |
| Determined by | E.E.S. [E. E. Stanford] |
| Date Determined | 1924 |
| Family | Polygonaceae |
| Determination | Polygonum amphibium f. simile Fernald |
| Determined by | [M. L. Fernald (scripsit) annotation on sheet, W. T. Kittredge, 2019] |
| Annotation Text | Type n.f. |
| Family | Polygonaceae |
| Determination | Polygonum amphibium Linnaeus |
| Determination Remarks | [label name] |
| Sex | not determined |
| Phenology | Flower |
| Preparation Type | Sheet |
| Preparation Method | Pressed |
