| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Sassafras albidum | Root | 8000.0 | 81000.0 | * | |
| Myristica fragrans | Seed Essent. Oil | 1000.0 | 60000.0 | * | |
| Myristica fragrans | Essential Oil | 1000.0 | 33000.0 | * | |
| Cinnamomum verum | Leaf Essent. Oil | 6500.0 | 23000.0 | * | |
| Piper auritum | Leaf | 3290.0 | 4930.0 | 1.4 | * |
| Myristica fragrans | Seed | 120.0 | 2720.0 | * | |
| Ocimum basilicum | Plant | 60.0 | 400.0 | 0.8 | * |
| Anethum graveolens | Plant | 125.0 | 360.0 | 0.6 | * |
| Rosmarinus officinalis | Plant | 32.0 | 95.0 | -1.4 | * |
| Hamamelis virginiana | Leaf | -- | 10.0 | -0.7 | * |
| Rheum palmatum | Rhizome | -- | 2.0 | * | |
| Ephedra sinica | Shoot | -- | 2.0 | * | |
| Sassafras albidum | Leaf | -- | -- | -0.7 | * |
| Umbellularia californica | Plant | -- | -- | * | |
| Juniperus virginiana | Leaf | -- | -- | * | |
| Camellia sinensis | Leaf | -- | -- | * | |
| Piper nigrum | Fruit Essent. Oil | -- | -- | * | |
| Piper cubeba | Fruit | -- | -- | Lawrence, B.M., Essential Oils 1976-1977, Essential Oils 1978, Essential Oils 1979-1980. | |
| Cinnamomum aromaticum | Plant | -- | -- | * | |
| Cinnamomum verum | Leaf | -- | -- | Wealth of India. |