Persicaria hydropiper (Water-pepper)
| Participant | Municipality (county) | Num. obs. | Num. species | Num. images | Last obs. |
|---|---|---|---|---|---|
| Askim videregående skole | Østfold, Norway | 2 | 1 | 0 | 1994-05-27 |
| Universitetet i Stavanger | Rogaland, Norway | 2 | 1 | 0 | 2020-09-08 |
| Bømlo vidaregåande skule | Vestland, Norway | 1 | 1 | 0 | 1989-09-26 |
| Ytrebygda skole | Vestland, Norway | 1 | 1 | 0 | 2014-05-16 |