| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Sambucus nigra | Flower Essent. Oil | -- | -- | * | |
| Valeriana officinalis | Root Essent. Oil | -- | -- | * | |
| Camellia sinensis | Leaf | -- | -- | * | |
| Eruca sativa | Hs | -- | -- | * | |
| Panax ginseng | Flower Essent. Oil | -- | -- | * | |
| Rosmarinus officinalis | Resin, Exudate, Sap | -- | -- | * | |
| Myristica fragrans | Seed | -- | -- | * | |
| Panax ginseng | Shoot | -- | -- | * | |
| Myristica fragrans | Seed Essent. Oil | -- | -- | * | |
| Magnolia denudata | Bark | -- | -- | * | |
| Magnolia denudata | Bulb | -- | -- | * | |
| Magnolia denudata | Flower | -- | -- | * | |
| Magnolia denudata | Leaf | -- | -- | * | |
| Magnolia denudata | Twig | -- | -- | * | |
| Artemisia capillaris | Essential Oil | -- | -- | * | |
| Mentha pulegium | Plant | -- | -- | Duke, J. A. Writeups or information summaries on approximately 2,000 economic plants, USDA, ARS, Beltsville, MD 20705. | |
| Mentha pulegium | Essential Oil | -- | -- | * | |
| Melia azedarach | Wood | -- | -- | * | |
| Boswellia sacra | Essential Oil | -- | -- | * |