Species: Sennegras (Carex vesicaria)
| Site | Municipality (county) | Num. obs. | Num. species | Num. images | Last obs. | |
|---|
| Arkavatnet | Rogaland, Norway | 1 | 1 | 0 | 1989-08-28 | |
| Harestuvannet | Akershus, Norway | 1 | 1 | 0 | 1990-09-04 | |
| Jegersborgdammen | Oslo, Norway | 1 | 1 | 0 | 1989-09-06 | |
| Kjemsjøen | Innlandet, Norway | 1 | 1 | 0 | 1989-09-14 | |
| Laksådalsvatnet | Nordland, Norway | 1 | 1 | 0 | 1989-09-14 | |
| Lundarvatnet | Vestland, Norway | 1 | 1 | 0 | 1994-11-24 | |
| Nes Verk rundt | Agder, Norway | 1 | 1 | 0 | 2024-05-22 | |
| Nøklevann | Oslo, Norway | 1 | 1 | 0 | 1989-09-15 | |
| Reinsvolldammen | Innlandet, Norway | 1 | 1 | 0 | 1989-09-13 | |
| Tretjønnet | Agder, Norway | 2 | 1 | 0 | 1990-06-26 | |
| Tømmervatnet | Troms, Norway | 1 | 1 | 0 | 1993-09-17 | |