Genus: Vasshårslekta (Callitriche)
| Year | Arter/grupper | Localities | Participants | Observations |
|---|---|---|---|---|
| 2009 | 1 | 1 | 1 | 1 |
| 2008 | 1 | 1 | 1 | 2 |
| 2007 | 1 | 1 | 1 | 1 |
| 2005 | 1 | 2 | 2 | 2 |
| 2004 | 1 | 1 | 1 | 1 |
| 2003 | 1 | 1 | 1 | 1 |
| 2000 | 1 | 1 | 1 | 1 |
| 1998 | 1 | 1 | 1 | 1 |
| 1994 | 1 | 2 | 2 | 2 |
| 1992 | 1 | 1 | 1 | 1 |
| 1991 | 2 | 2 | 2 | 2 |
| 1989 | 5 | 13 | 13 | 15 |
| Totalt alle år | 7 | 19 | 18 | 30 |