| Answer | % Correct |
|---|---|
| Japanese knotweed | 78%
|
| Pink knotweed | 67%
|
| Rhubarb | 56%
|
| Common knotgrass | 33%
|
| Buckwheat | 22%
|
| Water knotweed | 22%
|
| Wild buckwheat (Eriogonum) | 22%
|
| Maidenhair | 11%
|
| Sea grape | 11%
|
| Sorrel | 11%
|
| Coral vine (Antigonon) | 0%
|