| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Arnica montana | Flower | -- | -- | * | |
| Cichorium endivia | Latex Exudate | -- | -- | * | |
| Cichorium intybus | Plant | -- | -- | * | |
| Lactuca scariola | Latex Exudate | -- | -- | * | |
| Lactuca sativa | Plant | -- | -- | * | |
| Taraxacum officinale | Latex Exudate | -- | -- | * |