| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Equisetum arvense | Plant | 935.0 | 4370.0 | 0.1 | * |
| Eriobotrya japonica | Leaf | -- | 2480.0 | -0.6 | Chen, H.C. and Lin, S.M. 1988. Determination of Mineral Elements in Certain Crude Drugs (Part 1), Kaohsiung J. Med. Sci., 4: 259-272. |
| Eriocaulon sp | Leaf | -- | 670.0 | -1.3 | * |
| Eriodictyon californicum | Leaf | 2156.0 | 9800.0 | 2.2 | * |
| Erythroxylum novogranatense | Leaf | 3800.0 | 6900.0 | 1.1 | * |
| Erythroxylum coca | Leaf | 2130.0 | 5700.0 | 0.6 | * |
| Erythroxylum novogranatense | Leaf | 5200.0 | 6700.0 | 1.0 | * |
| Eucommia ulmoides | Bark | -- | 2080.0 | 0.2 | Chen, H.C. and Lin, S.M. 1988. Determination of Mineral Elements in Certain Crude Drugs (Part 1), Kaohsiung J. Med. Sci., 4: 259-272. |
| Euodia rutaecarpa | Fruit | -- | 4950.0 | 1.3 | * |
| Eupatorium perfoliatum | Plant | 540.0 | 6000.0 | 0.6 | * |
| Eupatorium odoratum | Leaf | -- | 3200.0 | -0.4 | Tramil |
| Euphrasia officinalis | Plant | 641.0 | 4160.0 | 0.0 | * |
| Feijoa sellowiana | Fruit | 80.0 | 500.0 | -0.8 | Morton, J.F., Major Medicinal Plants. 1977. Atlas of Medicinal Plants of Middle America. Bahamas to Yucatan. 1981. |
| Ficus carica | Fruit | 158.0 | 872.0 | -0.6 | USDA's Ag Handbook 8 and sequelae) |
| Firmiana simplex | Seed | -- | 4480.0 | 0.6 | * |
| Foeniculum vulgare | Fruit | 1730.0 | 5012.0 | 1.3 | * |
| Foeniculum vulgare | Seed | 394.0 | 3650.0 | 0.3 | * |
| Forsythia suspensa | Fruit | -- | 1160.0 | -0.4 | * |
| Fragaria spp | Fruit | 98.0 | 1545.0 | -0.3 | * |
| Frangula purshiana | Bark | 440.0 | 1590.0 | -0.1 | * |