| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Zingiber officinale | Rhizome Essent. Oil | -- | 19400.0 | * | |
| Coleus barbatus | Root Essent. Oil | -- | 13000.0 | 1.0 | Jim Duke's personal files. |
| Panax quinquefolius | Root Essent. Oil | 1626.0 | 8677.0 | -1.0 | * |
| Zingiber officinale | Rhizome | -- | 280.0 | * | |
| Sideritis mugronensis | Flower | 20.0 | 30.0 | Manez, S., Jimenez, A., and Villar, A. 1991. Volatiles of Sideritis mugronensis Flower and Leaf. J. Ess. Oil Res., 3: 395-397. | |
| Ephedra sinica | Shoot | -- | 28.0 | * | |
| Sideritis mugronensis | Leaf | 5.0 | 10.0 | 1.0 | Manez, S., Jimenez, A., and Villar, A. 1991. Volatiles of Sideritis mugronensis Flower and Leaf. J. Ess. Oil Res., 3: 395-397. |
| Lindera benzoin | Leaf | -- | 0.2 | -1.0 | * |
| Artemisia herba-alba | Plant | -- | -- | * | |
| Myroxylon balsamum | Plant | -- | -- | * | |
| Valeriana officinalis | Plant | -- | -- | * | |
| Curcuma longa | Rhizome | -- | -- | * | |
| Daucus carota | Seed | -- | -- | * | |
| Valeriana officinalis | Root | -- | -- | * | |
| Achillea millefolium | Leaf | -- | -- | * | |
| Santalum album | Wood | -- | -- | * |