| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Polypodium vulgare | Rhizome | -- | -- | * | |
| Nicotiana tabacum | Leaf | -- | -- | ANON. 1948-1976. The Wealth of India raw materials. Publications and Information Directorate, CSIR, New Delhi. 11 volumes. | |
| Ipomoea purga | Tuber | -- | -- | * | |
| Angelica archangelica | Seed | -- | -- | * | |
| Angelica archangelica | Root | -- | -- | * |