Genus: Vasshårslekta (Callitriche)
| Site | Municipality (county) | Num. obs. | Num. species | Num. images | Last obs. | |
|---|
| Arkavatnet | Rogaland, Norway | 1 | 1 | 0 | 1989-08-28 | |
| Bergvikvatnet | Nordland, Norway | 1 | 1 | 0 | 1989-09-18 | |
| Burudvann | Akershus, Norway | 1 | 1 | 0 | 1991-09-12 | |
| Gårdsdam - Hvam vgs. | Akershus, Norway | 1 | 1 | 0 | 2000-06-07 | |
| Helsetvatnet | Møre og Romsdal, Norway | 7 | 2 | 0 | 2009-05-28 | |
| Hjørungdalsvatnet | Møre og Romsdal, Norway | 1 | 1 | 0 | 1989-09-06 | |
| Hovsdammen | Østfold, Norway | 1 | 1 | 0 | 1994-06-03 | |
| Kvitblikkvannet | Nordland, Norway | 3 | 2 | 0 | 1992-09-09 | |
| Liavatnet | Trøndelag, Norway | 1 | 1 | 0 | 1989-09-19 | |
| Ljøgodttjern | Akershus, Norway | 2 | 2 | 0 | 1989-09-21 | |
| Longvatnet | Rogaland, Norway | 1 | 1 | 0 | 1989-09-06 | |
| Mosvatnet | Rogaland, Norway | 1 | 1 | 0 | 1989-09-05 | |
| Myravatnet | Vestland, Norway | 1 | 1 | 0 | 1989-09-14 | |
| Nordre Skeisvatn | Rogaland, Norway | 1 | 1 | 0 | 2005-09-16 | |
| Nøklevann | Oslo, Norway | 2 | 2 | 0 | 1994-09-05 | |
| Reinsvolldammen | Innlandet, Norway | 1 | 1 | 0 | 1989-09-13 | |
| Storeidvatnet | Nordland, Norway | 1 | 1 | 0 | 1998-09-07 | |
| Øvre Storfjordvatnet | Nordland, Norway | 2 | 2 | 0 | 1989-09-01 | |
| Åstveitvannet | Vestland, Norway | 1 | 1 | 0 | 1989-09-07 | |