| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Phyllanthus emblica | Fruit | 240.0 | 1190.0 | -1.0 | * |
| Pinus pinea | Seed | 12540.0 | 15000.0 | 1.0 | * |
| Pinus edulis | Seed | 6050.0 | 6430.0 | -0.8 | USDA's Ag Handbook 8 and sequelae) |
| Pistacia vera | Seed | 9940.0 | 10340.0 | 0.0 | * |
| Pisum sativum | Fruit | 580.0 | 5737.0 | 0.8 | * |
| Pisum sativum | Shoot | -- | 313.0 | -1.0 | * |
| Pisum sativum | Seed | 2400.0 | 11353.0 | 0.3 | * |
| Portulaca oleracea | Herb | 570.0 | 13400.0 | -1.0 | * |
| Prunus dulcis | Seed | 9430.0 | 9864.0 | -0.1 | USDA's Ag Handbook 8 and sequelae) |
| Prunus domestica | Fruit | 290.0 | 1959.0 | -0.7 | USDA's Ag Handbook 8 and sequelae) |
| Prunus armeniaca | Fruit | 680.0 | 4980.0 | 0.5 | USDA's Ag Handbook 8 and sequelae) |
| Prunus persica | Fruit | 420.0 | 3402.0 | -0.1 | * |
| Psidium guajava | Fruit | 410.0 | 2952.0 | -0.3 | USDA's Ag Handbook 8 and sequelae) |
| Psidium cattleianum | Fruit | 290.0 | 1500.0 | -0.9 | * |
| Psophocarpus tetragonolobus | Tuber | 3970.0 | 9319.0 | 1.6 | * |
| Psophocarpus tetragonolobus | Seed | 10400.0 | 11346.0 | 0.3 | * |
| Psophocarpus tetragonolobus | Leaf | 1720.0 | 7430.0 | -1.2 | * |
| Psoralea esculenta | Root | -- | 1139.0 | -1.1 | Izadoost, M. & Robinson, T., Synergism & antagonism in the pharmacology of alkaloidal plants, pp 137-58 in Craker, L. & Simon, J., eds., Herbs, Spices & Medicinal Plants: Recent Advances in Botany, Horticulture & Pharmacology, v. 2, 1987, 255pp. |
| Pyrus communis | Fruit | 130.0 | 803.0 | -1.1 | * |
| Raphanus sativus | Root | 220.0 | 4265.0 | 0.4 | * |