| Name | Sparganium americanum var. rigidum R. T. Clausen |
| Authorship | R. T. Clausen |
| Rank | Variety |
| NomenclaturalStatus | NomLeg |
| Placed in | Sparganium americanum Nuttall |
| GUID | urn:lsid:ipni.org:names:241066-2 |
| Citation | 1937 Rhodora 39: 189 |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Sparganium americanum var. rigidum R. T. Clausen |
| Identification made in | [no date] (1) |
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