Family: Froskebittfamilien (Hydrocharitaceae)
| Year | Arter/grupper | Localities | Participants | Observations |
|---|---|---|---|---|
| 2012 | 1 | 1 | 1 | 1 |
| 2011 | 1 | 1 | 1 | 1 |
| 2006 | 1 | 1 | 1 | 6 |
| 2005 | 1 | 1 | 1 | 1 |
| 2004 | 1 | 2 | 2 | 2 |
| 1994 | 2 | 2 | 2 | 3 |
| 1993 | 1 | 1 | 1 | 1 |
| 1991 | 1 | 2 | 2 | 2 |
| 1990 | 1 | 2 | 2 | 2 |
| 1989 | 2 | 4 | 4 | 5 |
| Totalt alle år | 3 | 13 | 13 | 24 |
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