| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Artemisia capillaris | Plant | -- | -- | * | |
| Cichorium intybus | Flower | -- | -- | Rizk, A.F.M., The Phytochemistry of the Flora of Qatar, Scientific and Applied Research Centre, University of Qatar, Kingprint, Richmond, UK, 1986. | |
| Hyoscyamus niger | Plant | -- | -- | * | |
| Nicotiana tabacum | Leaf | -- | -- | * | |
| Melia azedarach | Leaf | -- | -- | * | |
| Hordeum vulgare | Plant | -- | -- | * | |
| Berberis vulgaris | Fruit | -- | -- | Jim Duke's personal files. | |
| Datura stramonium | Plant | -- | -- | * | |
| Bidens pilosa | Plant | -- | 300.0 | Jim Duke's personal files. | |
| Scopolia carniolica | Leaf | -- | -- | * | |
| Lawsonia inermis | Leaf | -- | -- | * | |
| Cytisus scoparius | Flower | -- | -- | * | |
| Prunella vulgaris | Plant | -- | -- | * | |
| Viburnum opulus | Bark | -- | -- | * | |
| Arachis hypogaea | Plant | -- | -- | * | |
| Atropa bella-donna | Plant | -- | -- | * | |
| Citrus paradisi | Fruit | -- | -- | * | |
| Medicago sativa | Fruit | -- | 140.0 | * | |
| Artemisia dracunculus | Shoot | -- | -- | Wealth of India. | |
| Brunfelsia uniflorus | Bark | -- | -- | * |