Equisetaceae
| Year | Arter/grupper | Localities | Participants | Observations |
|---|---|---|---|---|
| 2024 | 4 | 2 | 2 | 4 |
| 2023 | 3 | 3 | 3 | 3 |
| 2022 | 1 | 1 | 1 | 1 |
| 2021 | 3 | 4 | 4 | 4 |
| 2020 | 2 | 2 | 2 | 2 |
| 2019 | 6 | 4 | 4 | 7 |
| 2018 | 3 | 3 | 3 | 4 |
| 2017 | 3 | 2 | 2 | 4 |
| 2016 | 2 | 2 | 1 | 2 |
| 2015 | 6 | 7 | 5 | 11 |
| 2014 | 7 | 9 | 8 | 10 |
| 2013 | 7 | 6 | 6 | 24 |
| 2012 | 5 | 6 | 6 | 7 |
| 2011 | 5 | 5 | 5 | 7 |
| 2010 | 3 | 2 | 2 | 8 |
| 2009 | 4 | 4 | 4 | 7 |
| 2008 | 3 | 2 | 2 | 7 |
| 2007 | 4 | 4 | 4 | 6 |
| 2006 | 1 | 2 | 2 | 4 |
| 2005 | 2 | 4 | 4 | 9 |
| 2004 | 3 | 10 | 9 | 11 |
| 2003 | 1 | 3 | 3 | 4 |
| 2002 | 1 | 2 | 1 | 2 |
| 2001 | 1 | 1 | 1 | 1 |
| 2000 | 1 | 2 | 2 | 4 |
| 1999 | 2 | 2 | 2 | 4 |
| 1998 | 1 | 1 | 1 | 1 |
| 1997 | 1 | 3 | 3 | 3 |
| 1996 | 1 | 1 | 1 | 1 |
| 1995 | 1 | 2 | 2 | 2 |
| 1994 | 3 | 11 | 11 | 13 |
| 1993 | 2 | 5 | 5 | 6 |
| 1992 | 4 | 9 | 9 | 12 |
| 1991 | 3 | 12 | 11 | 14 |
| 1990 | 4 | 13 | 13 | 16 |
| 1989 | 4 | 67 | 69 | 78 |
| Totalt alle år | 12 | 156 | 147 | 303 |