Family: Sivfamilien (Juncaceae)
| Site | Municipality (county) | Num. obs. | Num. species | Num. images | Last obs. | |
|---|---|---|---|---|---|---|
| Ørsjøen | Innlandet, Norway | 1 | 1 | 0 | 1994-11-25 | |
| Ørskogkvia | Møre og Romsdal, Norway | 1 | 1 | 0 | 2010-06-08 | |
| Øvre Storfjordvatnet | Nordland, Norway | 3 | 3 | 0 | 1989-09-01 | |
| Årebrot | Rogaland, Norway | 1 | 1 | 0 | 2022-05-14 | |
| Årnestangen | Akershus, Norway | 1 | 1 | 0 | 2003-06-06 | |
| Årungen | Akershus, Norway | 1 | 1 | 0 | 1989-09-18 | |
| Åsen | Telemark, Norway | 4 | 2 | 0 | 2023-05-01 | |
| Åstveitvannet | Vestland, Norway | 2 | 2 | 0 | 1989-09-07 |
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