| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Hyacinthus orientalis | Flower | 0.48 | 6.9 | 1.0 | * |
| Cinnamomum verum | Bark | 6000.0 | 30000.0 | 1.0 | * |
| Syzygium aromaticum | Flower | -- | 1.0 | -1.0 | * |
| Cinnamomum aromaticum | Bark | 80.0 | 20550.0 | -1.0 | * |
| Vitis vinifera | Fruit | -- | -- | * | |
| Cinnamomum verum | Root | -- | -- | * | |
| Cinnamomum verum | Root Bark | -- | -- | * | |
| Cinnamomum verum | Essential Oil | -- | 800000.0 | * | |
| Cinnamomum verum | Leaf Essent. Oil | 9700.0 | 31000.0 | * | |
| Cnicus benedictus | Plant | -- | -- | Wichtl, M. 1984. Teedrogen. Ein Handbuch fur Apotheker und Arzte. Wissenschaftliche Verlagsgesellscharft. mbH Stuttgart. 393 pp. | |
| Cinnamomum verum | Bark Essent. Oil | 302000.0 | 765000.0 | * | |
| Cinnamomum verum | Stem Bark | -- | -- | * | |
| Syzygium aromaticum | Fruit | -- | 1.0 | * | |
| Myroxylon balsamum | Plant | -- | -- | * | |
| Vanilla planifolia | Fruit | -- | -- | * | |
| Cnicus benedictus | Flower | -- | -- | Jim Duke's personal files. | |
| Cnicus benedictus | Shoot | -- | -- | Jim Duke's personal files. | |
| 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. | |
| Melaleuca bracteata | Leaf | -- | -- | Guenther, E., The Essential Oils, 6 volumes, D. van Nostrand, New York, 1948-1952. | |
| Vaccinium myrtillus | Leaf | -- | -- | * |