| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Kaempferia galanga | Rhizome | -- | -- | * | |
| Houttuynia cordata | Shoot Essent. Oil | -- | -- | * | |
| Mentha spicata | Essential Oil | -- | -- | * | |
| Lindera benzoin | Twig | 13.0 | 15.0 | * | |
| Agathosma betulina | Leaf Essent. Oil | -- | -- | * | |
| Curcuma longa | Rhizome Essent. Oil | -- | -- | * | |
| Curcuma longa | Root | -- | -- | * | |
| Piper auritum | Leaf | -- | -- | Tramil | |
| Stevia rebaudiana | Flower | -- | -- | Kinghorn, A. D. (Ed.) 2002. Medicinal and Aromatic Plants - Industrial Profiles. Stevia. The genus Stevia. Taylor & Francis. New York, NY. 211 pp. | |
| Zingiber officinale | Rhizome Essent. Oil | -- | 18000.0 | * | |
| Stevia rebaudiana | Plant | -- | -- | Kinghorn, A. D. (Ed.) 2002. Medicinal and Aromatic Plants - Industrial Profiles. Stevia. The genus Stevia. Taylor & Francis. New York, NY. 211 pp. | |
| Zingiber officinale | Rhizome | -- | 180.0 | * | |
| Juniperus communis | Essential Oil | -- | -- | * | |
| Tanacetum parthenium | Fruit Essent. Oil | -- | 1300.0 | * | |
| Coleus barbatus | Stem Essent. Oil | -- | 11900.0 | Jim Duke's personal files. | |
| Cinnamomum verum | Root Bark | -- | -- | * | |
| Artemisia vulgaris | Plant | -- | -- | 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. | |
| Boswellia sacra | Essential Oil | -- | -- | Lawrence, B.M., Essential Oils 1976-1977, Essential Oils 1978, Essential Oils 1979-1980. | |
| Cedrus libani | Plant | -- | -- | * | |
| Chamaemelum nobile | Plant | -- | -- | * |