| Name | Potamogeton berchtoldii subsp. clystocarpus (Fernald) Les & Tippery |
| Authorship | (Fernald) Les & Tippery |
| Rank | Subspecies |
| Placed in | Potamogeton berchtoldii Fieber |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Potamogeton berchtoldii subsp. clystocarpus (Fernald) Les & Tippery |
| Identification made in | 2015 (1) |