| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Juglans regia | Fruit | -- | -- | Bisset, N.G., ed. 1994. Herbal Drugs and Phytopharmaceuticals. CRC Press. Boca Raton, FL. 566 pp. | |
| Juglans nigra | Fruit | -- | -- | * | |
| Dionaea muscipula | Plant | -- | 2050.0 | KREHER, NESZMELYI, POLOS & WAGNER 1988 |