Species: Stivt brasmegras (Isoëtes lacustris)
| Site | Municipality (county) | Num. obs. | Num. species | Num. images | Last obs. | |
|---|---|---|---|---|---|---|
| Arkavatnet | Rogaland, Norway | 1 | 1 | 0 | 1989-08-28 | |
| Bekk/ bekkmunning Haukvatnet | Trøndelag, Norway | 1 | 1 | 0 | 2015-06-05 | |
| Bogstadvannet | Oslo, Norway | 1 | 1 | 0 | 1993-06-10 | |
| Fetvatnet | Møre og Romsdal, Norway | 1 | 1 | 0 | 1989-09-29 | |
| Frøylandsvatnet | Rogaland, Norway | 1 | 1 | 0 | 1991-09-11 | |
| Gjerdsetvatnet | Møre og Romsdal, Norway | 1 | 1 | 0 | 2001-08-30 | |
| Gjerstadvannet | Agder, Norway | 1 | 1 | 0 | 2005-11-10 | |
| Haukvatnet | Trøndelag, Norway | 1 | 1 | 0 | 2013-06-05 | |
| Høknesøra | Trøndelag, Norway | 1 | 1 | 0 | 2005-12-01 | |
| Korssjøen | Vestfold, Norway | 4 | 1 | 0 | 1996-09-09 | |
| Kvitblikkvannet | Nordland, Norway | 4 | 1 | 0 | 1993-09-02 | |
| Longvatnet | Rogaland, Norway | 2 | 1 | 0 | 1990-06-01 | |
| Maltjern | Akershus, Norway | 2 | 1 | 0 | 1991-06-12 | |
| Mølledammen i Lomma 1 | Akershus, Norway | 1 | 1 | 0 | 2008-10-22 | |
| Nordre Skeisvatn | Rogaland, Norway | 1 | 1 | 0 | 2005-09-16 | |
| Odderøya | Agder, Norway | 1 | 1 | 0 | 2001-08-24 | |
| Opsangervatnet | Vestland, Norway | 1 | 1 | 0 | 1989-09-25 | |
| Resvatnet | Trøndelag, Norway | 1 | 1 | 0 | 1991-09-01 | |
| Rossevatn | Rogaland, Norway | 1 | 1 | 0 | 1989-09-06 | |
| Skarvatnet | Møre og Romsdal, Norway | 1 | 1 | 0 | 1989-09-13 | |
| Skjelbreidvatnet | Vestland, Norway | 1 | 1 | 0 | 1991-06-06 | |
| Spildervatnet | Nordland, Norway | 1 | 1 | 0 | 1989-09-20 | |
| Storavatnet | Vestland, Norway | 1 | 1 | 0 | 1989-09-26 | |
| vatn vatnet | Nordland, Norway | 1 | 1 | 0 | 2004-08-30 | |
| Øvre Storfjordvatnet | Nordland, Norway | 1 | 1 | 0 | 1989-09-01 |
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