| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Pimpinella anisum | Fruit | -- | 1878.0 | -0.1 | * |
| Pimpinella anisum | Seed | -- | 1878.0 | -0.4 | * |
| Pinellia ternata | Tuber | 560.0 | 710.0 | -0.7 | * |
| Pinus edulis | Seed | 2180.0 | 2650.0 | -0.1 | USDA's Ag Handbook 8 and sequelae) |
| Pinus echinata | Shoot | 255.0 | 2100.0 | -0.7 | * |
| Piper nigrum | Fruit | 1809.0 | 2319.0 | 0.1 | USDA's Ag Handbook 8 and sequelae) |
| Pistacia vera | Seed | 949.0 | 1644.0 | -0.5 | * |
| Pisum sativum | Seed | 319.0 | 1700.0 | -0.5 | * |
| Pisum sativum | Plant | 2200.0 | 3700.0 | -0.1 | * |
| Pisum sativum | Fruit | 218.0 | 2591.0 | 0.2 | * |
| Plantago psyllium | Seed | 111.0 | 510.0 | -1.0 | * |
| Plantago major | Seed | 318.0 | 1060.0 | -0.7 | * |
| Plantago asiatica | Plant | -- | 5320.0 | 0.4 | * |
| Platycodon grandiflorum | Root | 1250.0 | 1510.0 | -0.6 | * |
| Polygala tenuifolia | Root | -- | 960.0 | -0.9 | * |
| Polygonum multiflorum | Root | -- | 2340.0 | -0.1 | Pedersen, M. 1987. Nutritional Herbology. Pederson Publishing. Bountiful, Utah. 377 pp. |
| Polygonum multiflorum | Rhizome | -- | 890.0 | -0.8 | Chen, H.C. and Lin, S.M. 1988. Determination of Mineral Elements in Certain Crude Drugs (Part 1), Kaohsiung J. Med. Sci., 4: 259-272. |
| Portulaca oleracea | Herb | 670.0 | 18700.0 | 1.4 | * |
| Prunella vulgaris | Flower | -- | 4560.0 | 1.3 | Chen, H.C. and Lin, S.M. 1988. Determination of Mineral Elements in Certain Crude Drugs (Part 1), Kaohsiung J. Med. Sci., 4: 259-272. |
| Prunus armeniaca | Fruit | 76.0 | 615.0 | -0.7 | USDA's Ag Handbook 8 and sequelae) |