| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Rhododendron ponticum | Plant | -- | -- | * | |
| Rhus toxicodendron | Plant | -- | -- | * | |
| Rhus coriaria | Leaf | -- | -- | Hansel, R., Keller, K., Rimpler, H., and Schneider, G. eds. 1992. Hager's Handbuch der Pharmazeutischen Praxis, Drogen (A-D), 1209 pp., 1993 (E-O), 970 pp., 1994 (P-Z), 1196 pp. Springer-Verlag, Berlin. | |
| Ribes nigrum | Fruit | -- | -- | List, P.H. and Horhammer, L., Hager's Handbuch der Pharmazeutischen Praxis, Vols. 2-6, Springer-Verlag, Berlin, 1969-1979. | |
| Ribes nigrum | Fruit Juice | -- | -- | * | |
| Schinus terebinthifolius | Leaf | -- | -- | CRC Handbook of Medicinal Herbs and/or CRC Handbook of Proximate Analyses | |
| Schinus molle | Leaf | -- | -- | * | |
| Solanum tuberosum | Flower | -- | -- | * | |
| Syzygium aromaticum | Leaf | -- | -- | * | |
| Syzygium aromaticum | Fruit | -- | 20.0 | 1.8 | * |
| Trifolium pratense | Seed | -- | -- | * | |
| Vaccinium macrocarpon | Fruit | -- | -- | Jeffery B. Harborne and H. Baxter, eds. 1983. Phytochemical Dictionary. A Handbook of Bioactive Compounds from Plants. Taylor & Frost, London. 791 pp. | |
| Vaccinium corymbosum | Plant | -- | -- | * | |
| Viola tricolor | Flower | -- | -- | * | |
| Vitis vinifera | Fruit | 1.0 | 9.3 | 0.4 | * |
| Zingiber officinale | Plant | -- | -- | Stitt, Paul. Why George should eat broccoli. |