Cirsium heterophyllum (Melancholy Thistle)
| Participant | Municipality (county) | Num. obs. | Num. species | Num. images | Last obs. |
|---|---|---|---|---|---|
| Ottar Sætre | Møre og Romsdal, Norway | 10 | 1 | 0 | 2023-06-18 |
| Gunvor Hustoft | Rogaland, Norway | 8 | 1 | 1 | 2023-07-09 |
| Tove Hamre | Innlandet, Norway | 7 | 1 | 0 | 2019-07-03 |
| Tertnes videregående skole | Vestland, Norway | 4 | 1 | 3 | 2015-08-31 |
| Stryn vidaregåande skule | Vestland, Norway | 3 | 1 | 1 | 2023-09-12 |
| Gol skule | Buskerud, Norway | 1 | 1 | 0 | 2010-05-20 |
| Bergen katedralskole | Vestland, Norway | 1 | 1 | 1 | 2016-08-24 |
| Stiftinga Sunnmøre Museum, avd. Sykkylven Naturhistoriske Museum | Møre og Romsdal, Norway | 1 | 1 | 0 | 2010-09-01 |
| Løvås Oppveksttun/Avd skole | Vestland, Norway | 1 | 1 | 1 | 2014-05-22 |
| Sunnylven skule | Møre og Romsdal, Norway | 1 | 1 | 0 | 2010-06-08 |