| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Centaurea cyanus | Shoot | -- | -- | Jim Duke's personal files. | |
| Zingiber officinale | Plant | -- | -- | Stitt, Paul. Why George should eat broccoli. | |
| Solanum melongena | Fruit | -- | -- | * | |
| Morus alba | Leaf | -- | -- | * | |
| Calendula officinalis | Flower | -- | -- | * | |
| Trifolium pratense | Plant | -- | -- | J.S. Glasby Dict.Pls Containing 2ndary Metabolite. 1991. | |
| Althaea officinalis | Flower | -- | -- | * | |
| Spinacia oleracea | Shoot | -- | -- | * | |
| Tanacetum vulgare | Plant | -- | -- | * | |
| Harpagophytum procumbens | Tuber | -- | -- | * | |
| Conium maculatum | Plant | -- | -- | * | |
| Glycine max | Shoot | -- | -- | * | |
| Sambucus simpsonii | Flower | -- | -- | Grenand, P., Moretti, C., and Jacquemin, H. 1987. Pharmacopees Traditionnelles en Guyane. l'ORSTROM, Paris. 569 pp. | |
| Maranta arundinacea | Leaf | -- | -- | * | |
| Linum usitatissimum | Seed | -- | -- | * | |
| Rosmarinus officinalis | Shoot | -- | -- | * | |
| Eucommia ulmoides | Leaf | -- | -- | List, P.H. and Horhammer, L., Hager's Handbuch der Pharmazeutischen Praxis, Vols. 2-6, Springer-Verlag, Berlin, 1969-1979. | |
| Hydrastis canadensis | Plant | -- | -- | * | |
| Plantago major | Plant | -- | -- | * | |
| Brassica nigra | Seed | -- | -- | Jim Duke's personal files. |