| Name | Amaranthus watsonii Standley |
| Authorship | Standley |
| Rank | Species |
| NomenclaturalStatus | NomLeg |
| Placed in | Amaranthus Adanson |
| GUID | urn:lsid:ipni.org:names:10729-2 |
| Citation | 1914 Bull. Torrey Bot. Club 41: 505 |
| Holdings | 7 Specimens held in the Harvard University Herbaria identified as Amaranthus watsonii Standley |
| Identification made in | [no date] (5), 1952 (2) |