| Name | Sagittaria montevidensis Chamisso & Schlechtendal |
| Authorship | Chamisso & Schlechtendal |
| Rank | Species |
| NomenclaturalStatus | NomLeg |
| Placed in | Sagittaria Linnaeus |
| Contains | Sagittaria montevidensis subsp. calycina (Engelmann) Bogin Sagittaria montevidensis subsp. spongiosa (Engelmann) Bogin Sagittaria montevidensis subsp. spongiosa (Engelmann) Bogin |
| Holdings | 3 Specimens held in the Harvard University Herbaria identified as Sagittaria montevidensis Chamisso & Schlechtendal |
| Identification made in | [no date] (3) |