|
2018 |
2013 |
| Species | Observances | Percentage of plots | Observances | Percentage of plots |
Table 4.—Most commonly found invasive plant species, Maine, 2018 and 2013
| Nonnative bush honeysuckle (Lonicera spp.) | 17 | 4.4 | 12 | 2.2 |
|---|
| Canada thistle (Cirsium arvense) | 11 | 2.8 | 5 | 0.9 |
|---|
| Multiflora rose (Rosa multiflora) | 10 | 2.6 | 4 | 0.7 |
|---|
| Bull thistle (Cirsium vulgare) | 7 | 1.8 | 10 | 1.9 |
|---|
| Reed canarygrass (Phalaris arundinacea) | 5 | 1.3 | 27 | 5 |
|---|
| Glossy buckthorn (Frangula alnus) | 4 | 1 | 4 | 0.7 |
|---|
| Oriental bittersweet (Celastrus orbiculatus) | 4 | 1 | 3 | 0.6 |
|---|
| Norway maple (Acer platanoides) | 3 | 0.8 | 2 | 0.4 |
|---|
| Common buckthorn (Rhamnus cathartica) | 2 | 0.5 | 3 | 0.6 |
|---|
| Autumn olive (Elaeagnus umbellata) | 1 | 0.3 | 1 | 0.2 |
|---|
| Japanese barberry (Berberis thunbergii) | 1 | 0.3 | 6 | 1.1 |
|---|
| Japanese knotweed (Polygonum cuspidatum) | 1 | 0.3 | - | - |
|---|