Phylum: Dekkfrøete blomsterplanter (Magnoliophyta)
| Site | Municipality (county) | Num. obs. | Num. species | Num. images | Last obs. | |
|---|---|---|---|---|---|---|
| Ytre Bardal (Yttergården) | Nordland, Norway | 1 | 1 | 0 | 2012-04-30 | |
| Ytre Flosterøy | Agder, Norway | 9 | 2 | 0 | 1998-09-22 | |
| Ytre Hamre | Vestland, Norway | 18 | 3 | 0 | 2024-04-10 | |
| Ytre Hatlane | Møre og Romsdal, Norway | 1 | 1 | 1 | 2020-09-23 | |
| Ytre Ulvøya | Agder, Norway | 4 | 1 | 0 | 1994-12-09 | |
| Ytrebygda | Vestland, Norway | 2 | 2 | 0 | 2007-04-07 | |
| yttervold | Nordland, Norway | 1 | 1 | 0 | 2010-04-05 | |
| Ytterøy | Trøndelag, Norway | 46 | 1 | 0 | 1997-09-23 | |
| Ærdalsknutten | Agder, Norway | 5 | 2 | 5 | 2023-05-25 | |
| Ødegårskrysset | Møre og Romsdal, Norway | 2 | 2 | 0 | 2014-05-22 | |
| Øksendalsøra | Møre og Romsdal, Norway | 1 | 1 | 0 | 2008-04-18 | |
| Øksnevadlia | Rogaland, Norway | 1 | 1 | 1 | 2020-09-14 | |
| Øksnevadtjørna | Rogaland, Norway | 11 | 11 | 0 | 1994-11-23 | |
| Øksnevadvarden | Rogaland, Norway | 1 | 1 | 1 | 2020-09-01 | |
| Ølberg | Rogaland, Norway | 1 | 1 | 0 | 2008-02-19 | |
| Ølbergholmen | Vestfold, Norway | 23 | 1 | 0 | 1998-09-24 | |
| Ølbergstranden | Rogaland, Norway | 2 | 2 | 0 | 2008-03-15 | |
| Ølen | Vestland, Norway | 1 | 1 | 0 | 2019-04-08 | |
| Ølensvåg | Rogaland, Norway | 2 | 2 | 0 | 2008-04-11 | |
| Øra naturreservat | Østfold, Norway | 1 | 1 | 0 | 2008-02-27 | |
| Øre | Møre og Romsdal, Norway | 4 | 3 | 0 | 2020-04-14 | |
| Ørebukta | Østfold, Norway | 1 | 1 | 1 | 2024-06-05 | |
| Øren skole | Buskerud, Norway | 1 | 1 | 0 | 2014-08-22 | |
| Øren skole | Buskerud, Norway | 8 | 4 | 0 | 2008-04-29 | |
| Ørland III | Trøndelag, Norway | 2 | 1 | 0 | 2006-06-20 | |
| Ørsjøen | Innlandet, Norway | 6 | 6 | 0 | 1994-11-25 | |
| Ørskogkvia | Møre og Romsdal, Norway | 51 | 36 | 0 | 2010-06-08 | |
| Ørskogvika | Møre og Romsdal, Norway | 26 | 2 | 0 | 1998-09-30 | |
| Ørstveit | Telemark, Norway | 5 | 3 | 0 | 2017-05-31 | |
| Ørvik-området | Telemark, Norway | 3 | 3 | 0 | 2018-05-30 | |
| Ørvikåsen | Telemark, Norway | 2 | 2 | 0 | 2018-06-03 | |
| Østby | Trøndelag, Norway | 3 | 3 | 0 | 2007-04-17 | |
| Østbyveien | Akershus, Norway | 1 | 1 | 1 | 2020-09-16 | |
| Østbyveien | Akershus, Norway | 2 | 1 | 2 | 2024-06-09 | |
| Østensjø | Oslo, Norway | 3 | 3 | 0 | 2007-04-11 | |
| Østensjøvannet | Oslo, Norway | 1 | 1 | 1 | 2007-04-27 | |
| Østensjøvannet | Oslo, Norway | 3 | 3 | 3 | 2016-06-05 | |
| Østernvannet | Akershus, Norway | 6 | 6 | 0 | 1990-08-28 | |
| Østervik | Nordland, Norway | 1 | 1 | 1 | 2016-05-04 | |
| Østerøya | Vestfold, Norway | 3 | 1 | 0 | 1993-11-24 | |
| Østerøyveien 405 | Vestfold, Norway | 1 | 1 | 0 | 2017-03-23 | |
| Østlandet | Oslo, Norway | 4 | 4 | 0 | 2007-04-19 | |
| Østre Halsen | Vestfold, Norway | 14 | 1 | 0 | 1996-10-16 | |
| Østre Kvaknes-Staubø | Agder, Norway | 10 | 1 | 0 | 1994-11-04 | |
| Østre Kvelde | Vestfold, Norway | 2 | 2 | 0 | 2008-04-22 | |
| Østre Langøy | Telemark, Norway | 1 | 1 | 1 | 2024-06-09 | |
| Østre Torp | Akershus, Norway | 1 | 1 | 0 | 2018-04-08 | |
| Østvangvegen 95 | Innlandet, Norway | 1 | 1 | 0 | 2020-03-31 | |
| øståsen | Buskerud, Norway | 5 | 4 | 0 | 2008-04-10 | |
| Øvrafjelle | Rogaland, Norway | 2 | 2 | 2 | 2020-09-10 |
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