| Classification | Polygonaceae: Persicaria |
| Classification 1 | Polygonaceae: Polygonum |
| Barcode(s) | 00872950 |
| Collector | H. D. Thoreau |
| Country | United States of America |
| State | Massachusetts |
| Geography | North America: North America (CA, US, MX) (Region): United States of America: Massachusetts: Middlesex County: Concord |
| Locality | at Watts' ["Horatio C. Watts (1827-1899). Watts lived on the north side of Lexington Road near where the Cambridge Turnpike joins it. His potato field would have been between Lexington Road and the Turnpike." fide R. L. Angelo, Dec. 10, 2018] |
| Date Collected | 1856-08-14 |
| Remarks | ["In Watt’s Potatoe field at the Turnpike I find 2 new kinds of Polygonum -- very near to P. Persicaria -- & so to Lapathifolium (P. [Pennsylvanicum] common at Brattleboro & different). The first I will call the Purple spotted Polyg.[onum] ... The other [i.e., the second] -- I may call the Green spiked -- ... The 2d Dense green spiked -- white flowered -- broad leaved & great jointed. ... "]
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| GUID | http://purl.oclc.org/net/edu.harvard.huh/guid/uuid/0e0397f1-ea82-4d46-b633-b328e1d7ff4d |
| Harvard University Herbaria Barcode | 00872950 |
| Herbarium | GH |
| Family | Polygonaceae |
| Determination | Persicaria lapathifolia (Linnaeus) Delarbre |
| Determined by | Kittredge, Walter Tobey |
| Date Determined | 2017 |
| Determination Remarks | [current name] |
| Family | Polygonaceae |
| Determination | InQuestion Polygonum pensylvanicum Linnaeus |
| Subcollection | Thoreau Herbarium |
| Phenology | Fruit |
| Preparation Type | Sheet |
| Preparation Method | Pressed |
