| Classification | Polygonaceae: Polygonum | 
| Classification 1 | Polygonaceae: Persicaria | 
| Harvard University Herbaria Barcode(s) | 00036764 | 
| Type Status | Holotype | 
| Collector | C. C. Deam | 
| Collector number | 374 | 
| Country | Guatemala | 
| Geography | North America: Central America (Region): Guatemala | 
| Locality | Gualan | 
| Date Collected | 1905-01-14 | 
| Elevation | 128 m | 
| Verbatim Elevation | 420 feet | 
| Habitat | Swamp | 
| GUID | http://purl.oclc.org/net/edu.harvard.huh/guid/uuid/c64f278f-625e-4700-b13b-a799b3fe8921 | 
| Harvard University Herbaria Barcode | 00036764 | 
| Herbarium | GH | 
| Family | Polygonaceae | 
| Type Status | Holotype | 
| Holotype of | Polygonum longiocreatum Bartlett | 
| Verified by | Kittredge, Walter Tobey | 
| Date Determined | 2019 | 
| Determination Remarks | [filed under] | 
| Taxon Reference | (for  Polygonum longiocreatum Bartlett) Proc. Amer. Acad. Arts 1907. 43: 51. | 
| Family | Polygonaceae | 
| Determination | Persicaria glabra (Willdenow) M. Gómez | 
| Determined by | Kittredge, Walter Tobey | 
| Date Determined | 2019 | 
| Determination Remarks | [current name] | 
| Family | Polygonaceae | 
| Determination | Polygonum densiflorum C. F. W. Meissner | 
| Date Determined | 1977 | 
| Family | Polygonaceae | 
| Determination | Polygonum longiocreatum Bartlett | 
| Determined by | H.H.B. [H. H. Bartlett] | 
| Determination Remarks | [label name] | 
| Annotation Text | sp. nov. | 
| Family | Polygonaceae | 
| Determination | InQuestion Polygonum densiflorum C. F. W. Meissner | 
| Determined by | E.E.S. [E. E. Stanford] | 
| Sex | not determined | 
| Phenology | Flower | 
| Preparation Type | Sheet | 
| Preparation Method | Pressed |