Genus: Tjernaksslekta (Potamogeton)
| Site | Municipality (county) | Num. obs. | Num. species | Num. images | Last obs. | |
|---|
| Mosvatnet | Rogaland, Norway | 1 | 1 | 0 | 1989-09-05 | |
| Nordre Skeisvatn | Rogaland, Norway | 1 | 1 | 0 | 2005-09-16 | |
| Nøklevann | Oslo, Norway | 6 | 4 | 0 | 1994-09-05 | |
| Odderøya | Agder, Norway | 1 | 1 | 0 | 2001-08-24 | |
| Oltervatnet | Nordland, Norway | 2 | 2 | 0 | 1989-09-14 | |
| Opsangervatnet | Vestland, Norway | 4 | 2 | 0 | 1994-06-03 | |
| Pytt ved Strand gård | Trøndelag, Norway | 1 | 1 | 0 | 2004-09-14 | |
| Pytt ved Strand gård | Trøndelag, Norway | 1 | 1 | 0 | 2004-08-14 | |
| Raudsjøen | Trøndelag, Norway | 1 | 1 | 0 | 1989-08-31 | |
| Reiarsvatnet | Rogaland, Norway | 4 | 2 | 0 | 1992-09-18 | |
| Reinsvolldammen | Innlandet, Norway | 1 | 1 | 0 | 1989-09-13 | |
| Resvatnet | Trøndelag, Norway | 2 | 2 | 0 | 1991-09-01 | |
| Rossevatn | Rogaland, Norway | 3 | 3 | 0 | 1989-09-06 | |
| Rundvannet | Troms, Norway | 1 | 1 | 0 | 1989-09-12 | |
| Rørvatnet | Møre og Romsdal, Norway | 1 | 1 | 0 | 1989-10-11 | |
| Sagtjernet | Innlandet, Norway | 1 | 1 | 0 | 1989-09-20 | |
| Seljebøvatnet | Møre og Romsdal, Norway | 1 | 1 | 0 | 1989-09-19 | |
| Semsvannet | Akershus, Norway | 2 | 2 | 0 | 1989-09-21 | |
| Sillongen | Innlandet, Norway | 2 | 2 | 0 | 1989-09-14 | |
| Skarvatnet | Møre og Romsdal, Norway | 2 | 2 | 0 | 1989-09-13 | |
| Skjelbreidvatnet | Vestland, Norway | 2 | 2 | 0 | 1990-09-18 | |
| skraperudtjern | Oslo, Norway | 1 | 1 | 0 | 2011-09-15 | |
| Spildervatnet | Nordland, Norway | 2 | 2 | 0 | 1994-06-10 | |
| Stavsjø | Innlandet, Norway | 5 | 3 | 0 | 1989-09-05 | |
| Storavatnet | Vestland, Norway | 1 | 1 | 0 | 1989-09-26 | |
| Stordammen | Akershus, Norway | 1 | 1 | 0 | 1989-09-08 | |
| Storeidvatnet | Nordland, Norway | 1 | 1 | 0 | 1998-09-07 | |
| Storvannet | Nordland, Norway | 1 | 1 | 0 | 1990-09-07 | |
| Storvatnet | Trøndelag, Norway | 1 | 1 | 0 | 2004-09-14 | |
| Storvatnet | Trøndelag, Norway | 2 | 2 | 0 | 2004-08-14 | |
| Stølevannet | Vestland, Norway | 1 | 1 | 0 | 1995-10-18 | |
| Svartaholtjørnet | Vestland, Norway | 1 | 1 | 0 | 1989-09-21 | |
| Tornesvatnet | Rogaland, Norway | 4 | 4 | 0 | 1989-09-07 | |
| Tranevatnet | Vestland, Norway | 1 | 1 | 0 | 2005-08-21 | |
| Tretjønnet | Agder, Norway | 2 | 2 | 0 | 1990-06-26 | |
| Tussvatnet | Nordland, Norway | 2 | 2 | 0 | 1989-09-14 | |
| Tveitevannet | Vestland, Norway | 2 | 2 | 0 | 1989-09-07 | |
| Ulfsbakktjønn | Vestfold, Norway | 2 | 1 | 0 | 1996-09-25 | |
| Vasslivatnet | Rogaland, Norway | 1 | 1 | 0 | 1994-11-24 | |
| Vikerauntjønna | Trøndelag, Norway | 4 | 4 | 0 | 1989-09-19 | |
| Ørsjøen | Innlandet, Norway | 1 | 1 | 0 | 1994-11-25 | |
| Østernvannet | Akershus, Norway | 1 | 1 | 0 | 1990-08-28 | |
| Øvre Storfjordvatnet | Nordland, Norway | 4 | 4 | 0 | 1989-09-01 | |
| Årungen | Akershus, Norway | 2 | 2 | 0 | 1991-09-16 | |
| Åstveitvannet | Vestland, Norway | 1 | 1 | 0 | 1989-09-07 | |
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