| Classification | Polygonum: Polygonaceae |
| Classification 1 | Persicaria: Polygonaceae |
| Harvard University Herbaria Barcode(s) | 00036704 |
| Type Status | Holotype |
| Collector | J. C. Nevin |
| Collector number | 2 |
| Country | United States of America |
| State | California |
| Geography | North America: North America (CA, US, MX) (Region): United States of America: California: Los Angeles County: Los Angeles |
| Locality | East Los Angeles |
| Date Collected | 1904 |
| GUID | http://purl.oclc.org/net/edu.harvard.huh/guid/uuid/04066385-1a11-4566-93df-e08672808b23 |
| Harvard University Herbaria Barcode | 00036704 |
| Herbarium | GH |
| Family | Polygonaceae |
| Type Status | Holotype |
| Holotype of | Polygonum hydropiperoides var. asperifolium Stanford |
| Verified by | Kittredge, Walter Tobey |
| Date Determined | 2019 |
| Determination Remarks | [filed under] |
| Taxon Reference | (for Polygonum hydropiperoides var. asperifolium Stanford) Rhodora 1926. 28(326): 27. |
| Family | Polygonaceae |
| Determination | Persicaria hydropiperoides (Michaux) Small |
| Determined by | Kittredge, Walter Tobey |
| Date Determined | 2019 |
| Determination Remarks | [current name] |
| Family | Polygonaceae |
| Determination | Polygonum hydropiperoides var. asperifolium Stanford |
| Determined by | E.E.S. [E. E. Stanford] |
| Date Determined | 1924 |
| Annotation Text | Type |
| Family | Polygonaceae |
| Determination | Polygonum hydropiperoides Michaux |
| Determination Remarks | [label name] |
| Sex | not determined |
| Phenology | FlowerAndFruit |
| Preparation Type | Sheet |
| Preparation Method | Pressed |
