| Name | Potamogeton gramineus var. maximus Morong ex A. Bennett |
| Authorship | Morong ex A. Bennett |
| Rank | Variety |
| Placed in | Potamogeton gramineus Linnaeus |
| Holdings | 60 Specimens held in the Harvard University Herbaria identified as Potamogeton gramineus var. maximus Morong ex A. Bennett |
| Identification made in | [no date] (57), 1941 (3) |
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