Klasse: Snelleplanter (Sphenopsida)
| Site | Municipality (county) | Num. obs. | Num. species | Num. images | Last obs. | |
|---|---|---|---|---|---|---|
| Nøklevann | Oslo, Norway | 4 | 1 | 0 | 1994-09-05 | |
| Oasen skole Birkelid AS | Agder, Norway | 1 | 1 | 1 | 2021-09-03 | |
| Oltervatnet | Nordland, Norway | 1 | 1 | 0 | 1989-09-14 | |
| Raudsjøen | Trøndelag, Norway | 1 | 1 | 0 | 1989-08-31 | |
| Reiarsvatnet | Rogaland, Norway | 1 | 1 | 0 | 1990-09-14 | |
| Reinsvolldammen | Innlandet, Norway | 1 | 1 | 0 | 1989-09-13 | |
| Renslotunet | Buskerud, Norway | 7 | 3 | 0 | 2010-05-28 | |
| Resvatnet | Trøndelag, Norway | 1 | 1 | 0 | 1991-09-01 | |
| Rogaland arboret | Rogaland, Norway | 1 | 1 | 0 | 2020-08-26 | |
| Rornesvannet | Troms, Norway | 1 | 1 | 0 | 2006-09-20 | |
| Rossevatn | Rogaland, Norway | 1 | 1 | 0 | 1989-09-06 | |
| Rudolf Steinerskolen Holtebrekk | Akershus, Norway | 1 | 1 | 0 | 2006-08-24 | |
| Røldalstjørnet | Vestland, Norway | 1 | 1 | 0 | 1989-09-14 | |
| Sagtjernet | Innlandet, Norway | 1 | 1 | 0 | 1989-09-20 | |
| Sagåsen | Innlandet, Norway | 1 | 1 | 0 | 2014-05-29 | |
| Seljebøvatnet | Møre og Romsdal, Norway | 1 | 1 | 0 | 1989-09-19 | |
| Semsvannet | Akershus, Norway | 3 | 3 | 0 | 1994-05-18 | |
| Sillongen | Innlandet, Norway | 2 | 2 | 0 | 1989-09-14 | |
| Sjøholt | Møre og Romsdal, Norway | 1 | 1 | 0 | 2015-05-14 | |
| Skarvatnet | Møre og Romsdal, Norway | 1 | 1 | 0 | 1989-09-13 | |
| Skjelbreidvatnet | Vestland, Norway | 1 | 1 | 0 | 1989-09-13 | |
| Skranevatnet | Vestland, Norway | 16 | 4 | 2 | 2014-05-22 | |
| skraperudtjern | Oslo, Norway | 1 | 1 | 0 | 2011-09-15 | |
| Solobservatoriet | Akershus, Norway | 1 | 1 | 1 | 2013-08-28 | |
| Spildervatnet | Nordland, Norway | 1 | 1 | 0 | 1989-09-20 | |
| Stavsjø | Innlandet, Norway | 2 | 1 | 0 | 1989-09-05 | |
| Stensrudtjern | Oslo, Norway | 1 | 1 | 0 | 1989-09-21 | |
| Stignavatnet | Vestland, Norway | 1 | 1 | 0 | 2013-06-12 | |
| Stokkevannet | Telemark, Norway | 1 | 1 | 0 | 1989-09-13 | |
| Storavatnet | Vestland, Norway | 1 | 1 | 0 | 1989-09-26 | |
| Stordammen | Akershus, Norway | 1 | 1 | 0 | 1989-09-08 | |
| Store Bjørnevatnet | Agder, Norway | 1 | 1 | 0 | 1989-08-30 | |
| Storeidvatnet | Nordland, Norway | 1 | 1 | 0 | 1998-09-07 | |
| Storvannet | Nordland, Norway | 1 | 1 | 0 | 1990-09-07 | |
| Storvatnet | Trøndelag, Norway | 2 | 2 | 0 | 2004-08-14 | |
| Sundkilen | Telemark, Norway | 1 | 1 | 0 | 1989-09-07 | |
| Svanevatnet | Rogaland, Norway | 1 | 1 | 0 | 1989-09-04 | |
| Sæbyvannet | Østfold, Norway | 1 | 1 | 0 | 2002-05-30 | |
| Søreide | Vestland, Norway | 4 | 3 | 0 | 2013-06-13 | |
| Tornesvatnet | Rogaland, Norway | 1 | 1 | 0 | 1989-09-07 | |
| Tranevatnet | Vestland, Norway | 1 | 1 | 0 | 2005-08-21 | |
| Tranevågen skule | Vestland, Norway | 1 | 1 | 0 | 2010-09-08 | |
| Tussvatnet | Nordland, Norway | 1 | 1 | 0 | 1989-09-14 | |
| Tveitavatnet | Vestland, Norway | 1 | 1 | 0 | 1989-09-24 | |
| Tveitevannet | Vestland, Norway | 1 | 1 | 0 | 1989-09-07 | |
| Tylldalen | Innlandet, Norway | 1 | 1 | 0 | 2010-05-07 | |
| Tylldalen | Innlandet, Norway | 1 | 1 | 1 | 2012-08-24 | |
| Tømmervatnet | Troms, Norway | 1 | 1 | 0 | 1993-09-17 | |
| Ulfsbakktjønn | Vestfold, Norway | 3 | 1 | 0 | 1997-09-16 | |
| Vassetsætra | Møre og Romsdal, Norway | 4 | 3 | 0 | 2009-09-04 |
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