| Name | Sagittaria calycina var. spongiosa Engelmann |
| Authorship | Engelmann |
| Rank | Variety |
| NomenclaturalStatus | NomLeg |
| Placed in | Sagittaria calycina Engelmann |
| GUID | urn:lsid:ipni.org:names:1018433-2 |
| Citation | 1867 Manual (Gray), ed. 5 493 |
| Holdings | 2 Specimens held in the Harvard University Herbaria identified as Sagittaria calycina var. spongiosa Engelmann |
| Identification made in | [no date] (2) |
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