| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Prunus laurocerasus | Leaf | 14000.0 | 15000.0 | 1.4 | * |
| Prunus serotina | Bark | 5000.0 | 15000.0 | * | |
| Pteridium aquilinum | Leaf | -- | 1580.0 | -0.6 | * |
| Prunus serotina | Leaf | -- | 562.0 | -0.8 | * |
| Prunus dulcis | Seed | -- | 50.0 | * | |
| Prunus persica | Seed | -- | -- | * | |
| Carica papaya | Leaf | -- | -- | Jim Duke's personal files. | |
| Prunus cerasus | Seed | -- | -- | * | |
| Perilla frutescens | Leaf | -- | -- | Jeffery B. Harborne and H. Baxter, eds. 1983. Phytochemical Dictionary. A Handbook of Bioactive Compounds from Plants. Taylor & Frost, London. 791 pp. | |
| Achillea millefolium | Plant | -- | -- | Bisset, N.G., ed. 1994. Herbal Drugs and Phytopharmaceuticals. CRC Press. Boca Raton, FL. 566 pp. |