| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Hypericum perforatum | Plant | 0.15 | 2.7 | -0.7 | * |
| Eucalyptus citriodora | Leaf Essent. Oil | -- | 1000.0 | -0.7 | * |
| Aspalathus linearis | Leaf Essent. Oil | -- | 500.0 | -0.7 | * |
| Citrus aurantiifolia | Fruit | -- | 60.0 | -0.7 | Lawrence, B.M., Essential Oils 1976-1977, Essential Oils 1978, Essential Oils 1979-1980. |
| Coriandrum sativum | Fruit | 2.0 | 54.0 | -0.7 | * |
| Ocimum basilicum | Shoot Essent. Oil | -- | 1200.0 | -0.8 | * |
| Satureja montana | Essential Oil | -- | 12200.0 | -0.8 | * |
| Tanacetum parthenium | Essential Oil | -- | 10000.0 | -0.8 | * |
| Tagetes minuta | Essential Oil | -- | 6500.0 | -0.9 | * |
| Ocimum basilicum | Essential Oil | -- | 1200.0 | -0.9 | * |
| 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 | * |