Species: Giant Hogweed (Heracleum mantegazzianum)
| Year | Arter/grupper | Localities | Participants | Observations |
|---|---|---|---|---|
| 2023 | 1 | 1 | 1 | 1 |
| 2022 | 1 | 2 | 2 | 3 |
| 2021 | 1 | 2 | 2 | 2 |
| 2020 | 1 | 7 | 6 | 8 |
| 2019 | 1 | 3 | 3 | 6 |
| 2018 | 1 | 1 | 1 | 2 |
| 2017 | 1 | 6 | 6 | 11 |
| 2016 | 1 | 23 | 6 | 45 |
| 2015 | 1 | 26 | 20 | 56 |
| 2014 | 1 | 1 | 1 | 2 |
| 2007 | 1 | 1 | 1 | 1 |
| 1998 | 1 | 1 | 1 | 1 |
| Totalt alle år | 1 | 69 | 40 | 138 |
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