| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Aesculus hippocastanum | Leaf | -- | -- | Jim Duke's personal files. | |
| Aesculus hippocastanum | Fruit Epidermis | -- | -- | Jim Duke's personal files. | |
| Laurus nobilis | Leaf | -- | -- | * | |
| Rubus idaeus | Stem | -- | -- | * | |
| Crataegus monogyna | Leaf | -- | -- | * | |
| Crataegus monogyna | Pericarp | -- | -- | * | |
| Cinnamomum aromaticum | Bark | -- | -- | * | |
| Vitis vinifera | Seed | -- | -- | * | |
| Crataegus laevigata | Flower | -- | -- | * | |
| Rubus idaeus | Leaf | -- | -- | * | |
| Rubus idaeus | Pericarp | -- | -- | * | |
| Cinchona spp | Bark | -- | -- | Chemical Constituents of Oriental Herbs (3 diff. books) | |
| Malus domestica | Leaf | -- | -- | * | |
| Aesculus hippocastanum | Seed Coat | 40.0 | 204.1 | Jim Duke's personal files. |