| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Citrus limon | Plant | -- | -- | Jim Duke's personal files. | |
| Citrus limon | Essential Oil | -- | 10.0 | Jim Duke's personal files. | |
| Citrus limon | Fruit Essent. Oil | -- | -- | Jim Duke's personal files. | |
| Citrus aurantium | Fruit | -- | -- | Williamson, E. M. and Evans, F. J., Potter's New Cyclopaedia of Botanical Drugs and Preparations, Revised Ed., Saffron Walden, the C. W. Daniel Co., Ltd., Essex UK, 362 pp, 1988, reprint 1989. | |
| Citrus aurantiifolia | Fruit | -- | -- | * | |
| Coriandrum sativum | Fruit | -- | -- | * | |
| Daucus carota | Root | -- | 0.3 | -0.8 | * |
| Dictamnus albus | Root | -- | -- | List, P.H. and Horhammer, L., Hager's Handbuch der Pharmazeutischen Praxis, Vols. 2-6, Springer-Verlag, Berlin, 1969-1979. | |
| Ficus carica | Resin, Exudate, Sap | 10.0 | 620.0 | * | |
| Ficus carica | Leaf | 10.0 | 10300.0 | 1.7 | * |
| Ficus carica | Plant | -- | -- | * | |
| Ficus carica | Fruit | -- | -- | * | |
| Foeniculum vulgare | Seed | -- | -- | * | |
| Foeniculum vulgare | Fruit | -- | -- | * | |
| Glehnia littoralis | Root | -- | -- | * | |
| Glehnia littoralis | Rhizome | -- | -- | * | |
| Glycyrrhiza glabra | Shoot | -- | -- | * | |
| Heracleum laciniatum | Root | 70.0 | 450.0 | -0.6 | * |
| Levisticum officinale | Root | -- | -- | * | |
| Limonia acidissima | Leaf | -- | 100.0 | -0.6 | Morton, J.F., Major Medicinal Plants. 1977. Atlas of Medicinal Plants of Middle America. Bahamas to Yucatan. 1981. |