| Classification | Polygonaceae: Polygonum |
| Classification 1 | Polygonaceae: Persicaria |
| Classification 2 | Polygonaceae: Polygonum |
| Harvard University Herbaria Barcode(s) | 00036719 |
| Type Status | Holotype |
| Collector | H. St. John |
| Collector number | 1216 |
| Country | Canada |
| State | Nova Scotia |
| Geography | North America: North America (CA, US, MX) (Region): Canada: Nova Scotia |
| Locality | Sable Island |
| Georeference | 43° 59' 0.000" N, 59° 47' W Method: Unknown |
| Date Collected | 1913-08-23 |
| Habitat | Swampy edge of fresh water pond |
| Container | Flora of Nova Scotia |
| GUID | http://purl.oclc.org/net/edu.harvard.huh/guid/uuid/4d45a376-8c82-4ff1-865e-2892edc6b5ce |
| Harvard University Herbaria Barcode | 00036719 |
| Herbarium | GH |
| Family | Polygonaceae |
| Determination | Polygonum hydropiperoides var. psilostachyum H. St. John |
| Determination Remarks | [is label name] |
| Annotation Text | n.var. |
| Family | Polygonaceae |
| Determination | Persicaria hydropiperoides (Michaux) Small |
| Determined by | Kittredge, Walter Tobey |
| Date Determined | 2019 |
| Determination Remarks | [is Current name] |
| Family | Polygonaceae |
| Type Status | Holotype |
| Holotype of | Polygonum hydropiperoides var. psilostachyum H. St. John |
| Verified by | Kittredge, Walter Tobey |
| Date Determined | 2019 |
| Determination Remarks | [is filed under name] |
| Taxon Reference | (for Polygonum hydropiperoides var. psilostachyum H. St. John) Proc. Boston Soc. Nat. Hist. 1921. 36(1): 71. |
| Sex | not determined |
| Phenology | FlowerAndFruit |
| Preparation Type | Sheet |
| Preparation Method | Pressed |
