Family: Vassgrofamilien (Alismataceae)
| Site | Municipality (county) | Num. obs. | Num. species | Num. images | Last obs. | |
|---|---|---|---|---|---|---|
| Arkavatnet | Rogaland, Norway | 1 | 1 | 0 | 1989-08-28 | |
| Dælivannet | Akershus, Norway | 1 | 1 | 0 | 1989-08-04 | |
| Jåbekkvannet | Agder, Norway | 1 | 1 | 0 | 1991-06-11 | |
| Kolbjørnviksjøen | Østfold, Norway | 1 | 1 | 0 | 1989-09-01 | |
| Kverndammen | Telemark, Norway | 1 | 1 | 0 | 1989-09-26 | |
| Ledengstjern | Østfold, Norway | 1 | 1 | 0 | 1994-05-27 | |
| Ljøgodttjern | Akershus, Norway | 1 | 1 | 0 | 1989-09-21 | |
| Mosvatnet | Rogaland, Norway | 1 | 1 | 0 | 1989-09-05 | |
| Myklavatnet | Vestland, Norway | 1 | 1 | 0 | 1990-09-25 | |
| Nitelva ved Smedstusvingen | Akershus, Norway | 1 | 1 | 0 | 2013-06-07 | |
| Nøklevann | Oslo, Norway | 2 | 2 | 0 | 1994-09-05 | |
| Rørvatnet | Møre og Romsdal, Norway | 1 | 1 | 0 | 1989-10-11 | |
| Semsvannet | Akershus, Norway | 2 | 2 | 0 | 1989-09-21 | |
| Tveitevannet | Vestland, Norway | 1 | 1 | 0 | 1989-09-07 | |
| Årungen | Akershus, Norway | 2 | 1 | 0 | 1991-09-16 |
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