| Name | Potamogeton pusillus subsp. tenuissimus (Mertens & Koch) R. R. Haynes & Hellquist |
| Authorship | (Mertens & W. D. J. Koch) R. R. Haynes & Hellquist |
| Rank | Subspecies |
| NomenclaturalStatus | NomLeg |
| Placed in | Potamogeton pusillus Linnaeus |
| Holdings | 303 Specimens held in the Harvard University Herbaria identified as Potamogeton pusillus subsp. tenuissimus (Mertens & Koch) R. R. Haynes & Hellquist |
| Identification made in | [no date] (222), 1937 (1), 1971 (1), 1972 (67), 1978 (4), 1979 (2), 1980 (1), 1981 (1), 1995 (2), 1999 (1), 2001 (1) |
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