| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Hyoscyamus niger | Seed | -- | 48.0 | 0.1 | * |
| Amomum xanthioides | Seed | -- | 48.0 | 0.1 | * |
| Foeniculum vulgare | Fruit | 7.1 | 33.0 | 0.1 | * |
| Glehnia littoralis | Root | -- | 26.0 | 0.1 | * |
| Polystichum polyblepharum | Plant | 34.0 | 60.0 | 0.1 | * |
| Petasites japonicus | Plant | 21.0 | 60.0 | 0.1 | Chem. & Pharm. Bull. 38: 2205. |
| Liquidambar styraciflua | Leaf | 12.0 | 98.0 | 0.1 | * |
| Rhus copallina | Leaf | 5.0 | 96.0 | 0.1 | * |
| Juniperus virginiana | Shoot | 7.0 | 317.0 | 0.1 | * |
| Mentha pulegium | Plant | -- | 56.0 | 0.0 | Pedersen, M. 1987. Nutritional Herbology. Pederson Publishing. Bountiful, Utah. 377 pp. |
| Houttuynia cordata | Plant | -- | 56.0 | 0.0 | Suziki, A., Morimoto, I., and Okitzu, T., Elution of Metals from Crude Drugs, Shoykugaku Zasshi 36(3):190-195. |
| Ipomoea aquatica | Leaf | 12.3 | 92.0 | 0.0 | * |
| Carya ovata | Seed | -- | 46.0 | 0.0 | * |
| Juglans nigra | Seed | -- | 46.0 | 0.0 | * |
| Pinus pinea | Seed | 42.0 | 46.0 | 0.0 | USDA's Ag Handbook 8 and sequelae) |
| Cucumis melo | Fruit | 1.5 | 31.0 | 0.0 | * |
| Glechoma hederacea | Plant | 46.0 | 53.0 | 0.0 | Chem. & Pharm. Bull. 38: 2205. |
| Viscum album | Leaf | -- | 86.0 | 0.0 | * |
| Secale cereale | Seed | 35.0 | 45.0 | -0.0 | USDA's Ag Handbook 8 and sequelae) |
| Sophora angustifolia | Root | 10.0 | 24.0 | -0.0 | * |