| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Piper nigrum | Fruit | -- | -- | * | |
| Magnolia denudata | Bark | -- | -- | * | |
| Magnolia denudata | Bulb | -- | -- | * | |
| Magnolia denudata | Flower | -- | -- | * | |
| Magnolia denudata | Leaf | -- | -- | * | |
| Magnolia denudata | Twig | -- | -- | * | |
| Artemisia herba-alba | Plant | -- | -- | * |