| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Agathosma betulina | Leaf Essent. Oil | -- | -- | * | |
| Boswellia sacra | Essential Oil | -- | -- | Lawrence, B.M., Essential Oils 1976-1977, Essential Oils 1978, Essential Oils 1979-1980. | |
| Artemisia herba-alba | Plant | -- | -- | * | |
| Psidium guajava | Pericarp Essent. Oil | -- | -- | * | |
| Cymbopogon winterianus | Plant | -- | -- | Lawrence, B.M., Essential Oils 1976-1977, Essential Oils 1978, Essential Oils 1979-1980. | |
| Pelargonium graveolens | Essential Oil | -- | -- | * | |
| Croton lechleri | Plant | -- | -- | Taylor, Leslie. 2005. The Healing Power of Rainforest Herbs. SquareOne Publisher, Garden City Park, NY. 519 pp. | |
| Turnera diffusa | Leaf | -- | -- | List, P.H. and Horhammer, L., Hager's Handbuch der Pharmazeutischen Praxis, Vols. 2-6, Springer-Verlag, Berlin, 1969-1979. | |
| Myroxylon balsamum | Plant | -- | -- | * | |
| Syzygium aromaticum | Flower | -- | -- | * | |
| Copaifera spp | Gum | -- | -- | * | |
| Zingiber officinale | Rhizome Essent. Oil | -- | -- | * | |
| Croton eluteria | Bark | -- | -- | * | |
| Larrea tridentata | Plant | -- | -- | * | |
| Piper nigrum | Fruit | -- | -- | * | |
| Piper nigrum | Fruit Essent. Oil | -- | -- | * | |
| Satureja hortensis | Plant | -- | -- | * | |
| Pinus sylvestris | Essential Oil | -- | -- | * | |
| Pinus sylvestris | Leaf Essent. Oil | -- | -- | * | |
| Cannabis sativa | Leaf Essent. Oil | -- | -- | * |