| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Callicarpa americana | Leaf | -- | 2.0 | * | |
| Salvia officinalis | Leaf Essent. Oil | -- | -- | * | |
| Salvia officinalis | Leaf | -- | -- | Duke, J. A. Writeups or information summaries on approximately 2,000 economic plants, USDA, ARS, Beltsville, MD 20705. |