| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Plantago major | Plant | 40000.0 | 57000.0 | -0.4 | * |
| Pogostemon cablin | Plant | -- | 17000.0 | -1.0 | * |
| Polygonum hydropiper | Plant | -- | 35000.0 | -0.7 | * |
| Populus nigra | Plant | -- | -- | * | |
| Portulaca oleracea | Plant | -- | -- | * | |
| Prosopis juliflora | Wood | -- | 9000.0 | -0.9 | * |
| Prosopis juliflora | Root | -- | 67000.0 | -0.3 | * |
| Prosopis juliflora | Bark | 6000.0 | 84000.0 | -0.5 | * |
| Prunella vulgaris | Plant | 45000.0 | 105800.0 | 0.3 | * |
| Prunus spinosa | Fruit | -- | -- | * | |
| Prunus persica | Fruit | -- | 8000.0 | -0.8 | * |
| Prunus cerasus | Bark | 50000.0 | 70000.0 | -0.6 | ANON. 1948-1976. The Wealth of India raw materials. Publications and Information Directorate, CSIR, New Delhi. 11 volumes. |
| Prunus serotina | Bark | -- | -- | * | |
| Prunus laurocerasus | Leaf | -- | -- | * | |
| Prunus armeniaca | Fruit | 600.0 | 1000.0 | -0.9 | * |
| Prunus persica | Leaf | -- | 8000.0 | -1.3 | * |
| Prunus domestica | Bark | -- | 68000.0 | -0.6 | ANON. 1948-1976. The Wealth of India raw materials. Publications and Information Directorate, CSIR, New Delhi. 11 volumes. |
| Psidium guajava | Root | -- | -- | * | |
| Psidium guajava | Leaf | 90000.0 | 100000.0 | -0.1 | Morton, J.F., Major Medicinal Plants. 1977. Atlas of Medicinal Plants of Middle America. Bahamas to Yucatan. 1981. |
| Psidium guajava | Bark | 110000.0 | 300000.0 | 1.4 | * |