| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Thymus serpyllum | Plant | 1.0 | 153.0 | 1.0 | * |
| Croton eluteria | Bark | -- | -- | * | |
| Citrus reticulata | Fruit | -- | 10.0 | Lawrence, B.M., Essential Oils 1976-1977, Essential Oils 1978, Essential Oils 1979-1980. | |
| Ocimum basilicum | Plant | -- | 0.2 | -1.0 | Die Nahrung. Pino, J., Rosado, A., Goire, I., Roncal, E., and Garcia, I. 1993. Analysis of the Essential Oil from Cuban Basil. Die Nahrung 37:(5): 501-504. |
| Croton lechleri | Plant | -- | -- | Taylor, Leslie. 2005. The Healing Power of Rainforest Herbs. SquareOne Publisher, Garden City Park, NY. 519 pp. |