| Classification | Polygonaceae: Polygonum |
| Classification 1 | Polygonaceae: Persicaria |
| Harvard University Herbaria Barcode(s) | 00036742 |
| Type Status | Holotype |
| Collector | E. F. Williams |
| Country | United States of America |
| State | Rhode Island |
| Geography | North America: North America (CA, US, MX) (Region): United States of America: Rhode Island: Providence County: Rumford |
| Date Collected | 1903-09-06 |
| GUID | http://purl.oclc.org/net/edu.harvard.huh/guid/uuid/5e08dc59-c2eb-476e-b2be-61925887aa05 |
| Harvard University Herbaria Barcode | 00036742 |
| Herbarium | GH |
| Family | Polygonaceae |
| Type Status | Holotype |
| Holotype of | Polygonum pensylvanicum var. laevigatum Fernald |
| Verified by | Crawford, W. Allen |
| Date Determined | 1971-05-** |
| Determination Remarks | [filed under] |
| Taxon Reference | (for Polygonum pensylvanicum var. laevigatum Fernald) Rhodora 1917. 19: 73. |
| Family | Polygonaceae |
| Determination | Persicaria pensylvanica (Linnaeus) M. Gomez |
| Determined by | Kittredge, Walter Tobey |
| Date Determined | 2019 |
| Determination Remarks | [current name] |
| Family | Polygonaceae |
| Determination | Polygonum pensylvanicum Linnaeus |
| Determination Remarks | [label name] |
| Family | Polygonaceae |
| Determination | Polygonum pensylvanicum var. laevigatum Fernald |
| Determined by | [M. L. Fernald (scripsit) annotation on provenance label, W. T. Kittredge, 2019] |
| Annotation Text | n. var. Type |
| Sex | not determined |
| Phenology | Flower |
| Preparation Type | Sheet |
| Preparation Method | Pressed |
