| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Zea mays | Plant | -- | -- | Stitt, Paul. Why George should eat broccoli. | |
| Zea mays | Pollen Or Spore | -- | -- | * | |
| Vitis vinifera | Leaf | -- | -- | * | |
| Vigna radiata | Sprout Seedling | -- | -- | * | |
| Vaccinium myrtillus | Leaf | -- | -- | * | |
| Vaccinium corymbosum | Leaf | -- | -- | * | |
| Vaccinium myrtillus | Fruit Juice | -- | -- | * | |
| Vaccinium vitis-idaea | Leaf | -- | -- | * | |
| Urtica dioica | Leaf | -- | -- | Jim Duke's personal files. | |
| Urtica dioica | Flower | 100.0 | 200.0 | * | |
| Urtica dioica | Inflorescence | -- | -- | Jim Duke's personal files. | |
| Urtica dioica | Plant | -- | 200.0 | -1.0 | * |
| Urtica dioica | Shoot | -- | -- | Jim Duke's personal files. | |
| Urtica dioica | Root | -- | -- | Jim Duke's personal files. | |
| Tropaeolum majus | Leaf | -- | -- | * | |
| Trigonella foenum-graecum | Plant | -- | -- | * | |
| Trifolium pratense | Leaf | -- | -- | * | |
| Trifolium pratense | Flower | -- | -- | * | |
| Tilia sp. | Flower | -- | -- | * | |
| Teucrium scordium | Plant | -- | -- | List, P.H. and Horhammer, L., Hager's Handbuch der Pharmazeutischen Praxis, Vols. 2-6, Springer-Verlag, Berlin, 1969-1979. |