| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Metrosideros sclerocarpa | Leaf | 177.0 | 708.0 | 2.6 | * |
| Cinnamomum verum | Bark | 20.0 | 124.0 | Lawrence, B.M., Essential Oils 1976-1977, Essential Oils 1978, Essential Oils 1979-1980. | |
| Echinacea spp | Root | 8.0 | 12.0 | Economic & Medicinal Plant Research, 5: 253. | |
| Ocimum gratissimum | Plant | 5.0 | 30.0 | -1.0 | Lawrence, B.M., Essential Oils 1976-1977, Essential Oils 1978, Essential Oils 1979-1980. |
| Carthamus tinctorius | Flower | 1.6 | 2.0 | * | |
| Artemisia annua | Plant | 1.0 | 120.0 | 1.0 | * |
| Achillea millefolium | Leaf | 0.5 | 22.0 | -0.4 | * |
| Melaleuca alternifolia | Leaf | 0.001 | 12.0 | -0.4 | * |
| Sarracenia flava | Essential Oil | -- | -- | * | |
| Pogostemon cablin | Plant | -- | -- | * | |
| Coleus barbatus | Root Essent. Oil | -- | 17000.0 | -1.0 | Jim Duke's personal files. |
| Cinnamomum aromaticum | Plant | -- | -- | * | |
| Laurus nobilis | Leaf Essent. Oil | -- | -- | * | |
| Zingiber officinale | Rhizome | -- | -- | * | |
| Scutellaria lateriflora | Plant | -- | -- | Newall, C. A., Anderson, L. A. and Phillipson, J. D. 1996. Herbal Medicine - A Guide for Health-care Professionals. The Pharmaceutical Press, London. 296pp. | |
| Pinus sylvestris | Essential Oil | -- | -- | * | |
| Houttuynia cordata | Shoot Essent. Oil | -- | -- | * | |
| Piper auritum | Leaf | -- | -- | Tramil | |
| Pilocarpus microphyllus | Leaf | -- | 100.0 | -0.0 | * |
| Elsholtzia polystachya | Leaf | -- | 7.4 | -0.4 | Mathela,C.S., Melkani,A.B., Bisht,J.C., Pant,A.K., Bestmann,H.J., Erler,J., Kobold,U., Rauscher,J. and Vostrowsky,O. 1992. Chemical Varieties of Essential Oils from Elsholtzia polystachya from Two Different Locations in India. Planta Medica 58: 376-379. |