| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Phyllanthus emblica | Leaf | -- | 21000.0 | 0.3 | * |
| Phyllanthus amarus | Shoot | -- | 1378.0 | -0.5 | * |
| Physalis peruviana | Root | -- | -- | * | |
| Pimpinella anisum | Seed | -- | -- | * | |
| Pimpinella anisum | Fruit | -- | -- | * | |
| Piper nigrum | Fruit | -- | -- | * | |
| Plumeria acutifolia | Plant | -- | -- | * | |
| Polygonum hydropiper | Leaf | 25000.0 | 30000.0 | 0.9 | * |
| Polygonum aviculare | Plant | -- | -- | * | |
| Prunella vulgaris | Plant | -- | -- | Chemical Constituents of Oriental Herbs (3 diff. books) | |
| Prunus cerasus | Plant | -- | -- | * | |
| Prunus armeniaca | Leaf | -- | 17700.0 | 0.1 | * |
| Prunus spinosa | Flower | -- | -- | * | |
| Prunus armeniaca | Fruit | -- | -- | * | |
| Pteridium aquilinum | Plant | -- | -- | * | |
| Pueraria montana | Leaf | -- | -- | * | |
| Punica granatum | Fruit Juice | -- | -- | * | |
| Punica granatum | Plant | -- | -- | Seeram, N. P., Schulman, R. N., and Heber, D., eds. 2006. Pomegranates - Ancient Roots to Modern Medicine. Taylor & Francis. Boca Raton, FL. 244 pp. | |
| Punica granatum | Leaf | -- | -- | * | |
| Rheum officinale | Root | -- | -- | Leung, A.Y., Encyclopedia of Common Natural Ingredients Used in Food, Drugs, and Cosmetics, John Wiley & Sons, New York, 1980. |