| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Aspalathus linearis | Leaf Essent. Oil | -- | 6800.0 | * | |
| Fragaria spp | Plant | -- | -- | * | |
| Rheum palmatum | Rhizome | -- | 0.5 | * | |
| Zea mays | Silk Stigma Style | -- | -- | * | |
| Zea mays | Husk Essent. Oil | -- | -- | * | |
| Zea mays | Seed Essent. Oil | -- | -- | * | |
| Zea mays | Silk Essent. Oil | -- | -- | * |