| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Echinacea spp | Leaf | -- | -- | Economic & Medicinal Plant Research, 5: 253. | |
| Eriobotrya japonica | Leaf | -- | 10500.0 | -0.4 | Jim Duke's personal files. |
| Erythroxylum novogranatense | Leaf | -- | 5000.0 | -0.7 | * |
| Erythroxylum coca | Leaf | -- | 5000.0 | -0.7 | * |
| Eschscholzia californica | Inflorescence | -- | -- | * | |
| Eschscholzia californica | Flower | 5000.0 | 50000.0 | 0.0 | * |
| Eucalyptus citriodora | Leaf | -- | 12500.0 | -0.2 | * |
| Eucalyptus globulus | Leaf | -- | -- | -1.0 | * |
| Eucalyptus macrorrhuncha | Plant | 120000.0 | 200000.0 | 2.3 | * |
| Eupatorium perfoliatum | Plant | -- | -- | * | |
| Euphorbia pulcherrima | Leaf | -- | -- | * | |
| Euphrasia officinalis | Plant | -- | -- | * | |
| Fagopyrum esculentum | Leaf | 11600.0 | 63700.0 | 3.0 | * |
| Fagopyrum esculentum | Seed | 87.0 | 511.0 | -0.8 | * |
| Fagopyrum esculentum | Flower | 40000.0 | 63700.0 | 0.2 | * |
| Fagopyrum esculentum | Stem | 600.0 | 50600.0 | * | |
| Fagopyrum esculentum | Petiole | 505.0 | 975.0 | * | |
| Fagopyrum esculentum | Plant | 1000.0 | 68300.0 | 0.3 | * |
| Fagopyrum esculentum | Testa | -- | 43.0 | * | |
| Fallopia japonica | Plant | -- | -- | List, P.H. and Horhammer, L., Hager's Handbuch der Pharmazeutischen Praxis, Vols. 2-6, Springer-Verlag, Berlin, 1969-1979. |