| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Aesculus hippocastanum | Bark | -- | 30000.0 | Bisset, N.G., ed. 1994. Herbal Drugs and Phytopharmaceuticals. CRC Press. Boca Raton, FL. 566 pp. | |
| Althaea officinalis | Shoot | -- | -- | * | |
| Althaea officinalis | Root | -- | -- | * | |
| Artemisia vulgaris | Plant | -- | -- | Bisset, N.G., ed. 1994. Herbal Drugs and Phytopharmaceuticals. CRC Press. Boca Raton, FL. 566 pp. | |
| Cichorium intybus | Leaf | -- | -- | * | |
| Cichorium intybus | Plant | -- | -- | * | |
| Crataegus rhipidophylla | Shoot | -- | -- | * | |
| Crataegus monogyna | Inflorescence | -- | -- | * | |
| Crataegus rhipidophylla | Fruit | -- | -- | Pedersen, M. 1987. Nutritional Herbology. Pederson Publishing. Bountiful, Utah. 377 pp. | |
| Crataegus laevigata | Fruit | -- | -- | Pedersen, M. 1987. Nutritional Herbology. Pederson Publishing. Bountiful, Utah. 377 pp. | |
| Crataegus laevigata | Shoot | -- | -- | * | |
| Hordeum vulgare | Protoplast | -- | -- | * | |
| Ocimum basilicum | Leaf | -- | -- | * | |
| Olea europaea | Stem | -- | -- | Chemical Constituents of Oriental Herbs (3 diff. books) | |
| Phaseolus vulgaris | Shoot | -- | -- | * |