Alnus glutinosa (Black Alder)
| Participant | Municipality (county) | Num. obs. | Num. species | Num. images | Last obs. |
|---|---|---|---|---|---|
| Stryn vidaregåande skule | Vestland, Norway | 27 | 1 | 3 | 2024-05-07 |
| Sandsli videregående skole | Vestland, Norway | 11 | 1 | 2 | 2013-05-30 |
| Gunvor Hustoft | Rogaland, Norway | 8 | 1 | 0 | 2024-05-06 |
| Skotterud skole | Innlandet, Norway | 2 | 1 | 2 | 2022-10-31 |
| Per Torgersen | Akershus, Norway | 2 | 1 | 0 | 2021-06-15 |
| Li skole | Akershus, Norway | 2 | 1 | 0 | 2013-06-07 |
| Kirkebygden barne- og ungdomsskole | Akershus, Norway | 2 | 1 | 0 | 2022-09-15 |
| Tertnes videregående skole | Vestland, Norway | 2 | 1 | 0 | 2015-09-01 |
| Aurdalslia skole | Vestland, Norway | 2 | 1 | 2 | 2013-05-28 |
| Hustadvika vidaregåande skole | Møre og Romsdal, Norway | 2 | 1 | 0 | 1993-06-16 |
| Fjelltun skole | Rogaland, Norway | 1 | 1 | 0 | 2022-09-08 |
| John Skartveit | Vestland, Norway | 1 | 1 | 1 | 2012-06-11 |
| Olav Julsrud | Oslo, Norway | 1 | 1 | 0 | 2013-06-20 |
| Groruddalen skole | Oslo, Norway | 1 | 1 | 0 | 2014-03-18 |
| Solbjørg Nygård | Innlandet, Norway | 1 | 1 | 0 | 2018-04-25 |
| Stiftelsen Soon Sjøskole | Akershus, Norway | 1 | 1 | 2 | 2022-10-17 |
| Askim videregående skole | Østfold, Norway | 1 | 1 | 0 | 1989-09-01 |
| Skien videregående skole/Avd Brekkeby | Telemark, Norway | 1 | 1 | 0 | 2005-09-19 |
| Nordstranda skule | Vestland, Norway | 1 | 1 | 1 | 2014-03-04 |
| Høyjord skole | Vestfold, Norway | 1 | 1 | 1 | 2010-09-30 |
| Gamleveien skole | Rogaland, Norway | 1 | 1 | 0 | 2005-08-31 |
| Sælen Oppveksttun avd skole | Vestland, Norway | 1 | 1 | 0 | 2016-04-21 |
| Hovedgården ungdomsskole | Akershus, Norway | 1 | 1 | 0 | 2005-05-23 |
| Bergen Vitensenter | Vestland, Norway | 1 | 1 | 0 | 2007-05-08 |
| Heikki Fjelldal | Akershus, Norway | 1 | 1 | 0 | 2024-03-15 |