Phylum: Karsporeplanter (Pteridophyta)
| Site | Municipality (county) | Num. obs. | Num. species | Num. images | Last obs. | |
|---|---|---|---|---|---|---|
| Tomaso | Vestland, Norway | 2 | 1 | 1 | 2013-06-10 | |
| Tornesvatnet | Rogaland, Norway | 1 | 1 | 0 | 1989-09-07 | |
| Tranevatnet | Vestland, Norway | 1 | 1 | 0 | 2005-08-21 | |
| Tranevågen skule | Vestland, Norway | 2 | 2 | 0 | 2010-09-08 | |
| Tretjønnet | Agder, Norway | 1 | 1 | 0 | 1989-09-27 | |
| Tursted Borge | Telemark, Norway | 1 | 1 | 0 | 2011-06-07 | |
| Tussvatnet | Nordland, Norway | 1 | 1 | 0 | 1989-09-14 | |
| Tveitafjellet | Vestland, Norway | 1 | 1 | 0 | 2013-10-17 | |
| 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 | |
| Ulriken | Vestland, Norway | 1 | 1 | 0 | 2018-09-10 | |
| Ulveset utmark | Vestland, Norway | 1 | 1 | 0 | 2012-09-21 | |
| Uranes | Vestland, Norway | 1 | 1 | 0 | 2008-05-04 | |
| Vang barne- og ungdomsskule | Innlandet, Norway | 1 | 1 | 0 | 2021-09-02 | |
| Vassenden | Innlandet, Norway | 1 | 1 | 0 | 2019-09-10 | |
| Vassenden | Innlandet, Norway | 1 | 1 | 0 | 2019-09-10 | |
| Vassenden | Innlandet, Norway | 1 | 1 | 0 | 2019-09-10 | |
| Vassetsætra | Møre og Romsdal, Norway | 8 | 6 | 0 | 2009-09-04 | |
| Vasslivatnet | Rogaland, Norway | 1 | 1 | 0 | 1994-11-24 | |
| vatn vatnet | Nordland, Norway | 2 | 2 | 0 | 2004-08-30 | |
| Vikeelva | Møre og Romsdal, Norway | 4 | 4 | 0 | 2015-06-10 | |
| Vikerauntjønna | Trøndelag, Norway | 1 | 1 | 0 | 1989-09-19 | |
| Vollsvatnet | Trøndelag, Norway | 1 | 1 | 0 | 2014-09-04 | |
| Voss vidaregåande skule | Vestland, Norway | 1 | 1 | 0 | 2019-02-01 | |
| Våge skule | Vestland, Norway | 1 | 1 | 1 | 2020-04-17 | |
| Vålåsjøen | Innlandet, Norway | 1 | 1 | 0 | 1989-08-24 | |
| Øksnevadtjørna | Rogaland, Norway | 1 | 1 | 0 | 1994-11-23 | |
| Ørskogkvia | Møre og Romsdal, Norway | 11 | 3 | 0 | 2010-06-08 | |
| Østernvannet | Akershus, Norway | 1 | 1 | 0 | 1990-08-28 | |
| Øvre Storfjordvatnet | Nordland, Norway | 2 | 2 | 0 | 1989-09-01 | |
| Årungen | Akershus, Norway | 2 | 1 | 0 | 1991-09-16 | |
| Åstveitvannet | Vestland, Norway | 1 | 1 | 0 | 2007-06-06 |
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