| Name | Potamogeton gramineus f. myriophyllus (J. W. Robbins) Morong |
| Authorship | (J. W. Robbins) Morong |
| Rank | Forma |
| Placed in | Potamogeton gramineus Linnaeus |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Potamogeton gramineus f. myriophyllus (J. W. Robbins) Morong |
| Identification made in | [no date] (1) |