| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Hamamelis virginiana | Leaf | -- | 10.0 | -0.7 | * |
| Illicium verum | Plant | -- | -- | * | |
| Illicium verum | Fruit | -- | -- | Leung, A. Y. and Foster, S. 1995. Encyclopedia of Common Natural Ingredients 2nd Ed. John Wiley & Sons, New York. 649 pp. | |
| Juniperus virginiana | Leaf | -- | -- | * | |
| Myristica fragrans | Essential Oil | 1000.0 | 33000.0 | * | |
| Myristica fragrans | Seed Essent. Oil | 1000.0 | 60000.0 | * | |
| Myristica fragrans | Seed | 120.0 | 2720.0 | * | |
| Ocimum basilicum | Plant | 60.0 | 400.0 | 0.8 | * |
| Pimpinella anisum | Essential Oil | -- | -- | * | |
| Piper nigrum | Fruit | -- | -- | * | |
| Piper cubeba | Fruit | -- | -- | Lawrence, B.M., Essential Oils 1976-1977, Essential Oils 1978, Essential Oils 1979-1980. | |
| Piper nigrum | Fruit Essent. Oil | -- | -- | * | |
| Piper auritum | Leaf | 3290.0 | 4930.0 | 1.4 | * |
| Rheum palmatum | Rhizome | -- | 2.0 | * | |
| Rosmarinus officinalis | Plant | 32.0 | 95.0 | -1.4 | * |
| Sassafras albidum | Leaf | -- | -- | -0.7 | * |
| Sassafras albidum | Root | 8000.0 | 81000.0 | * | |
| Tamarindus indica | Fruit | -- | -- | Williamson, E. M. and Evans, F. J., Potter's New Cyclopaedia of Botanical Drugs and Preparations, Revised Ed., Saffron Walden, the C. W. Daniel Co., Ltd., Essex UK, 362 pp, 1988, reprint 1989. | |
| Umbellularia californica | Plant | -- | -- | * |