| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Perilla frutescens | Plant | -- | -- | * | |
| Phyllanthus niruri | Leaf | -- | -- | Tramil | |
| Pinus sylvestris | Resin, Exudate, Sap | -- | -- | * | |
| Piper cubeba | Fruit | -- | -- | Leung, A.Y., Encyclopedia of Common Natural Ingredients Used in Food, Drugs, and Cosmetics, John Wiley & Sons, New York, 1980. | |
| Pogostemon cablin | Plant | -- | -- | * | |
| Prunus armeniaca | Essential Oil | -- | -- | * | |
| Psoralea corylifolia | Seed | -- | -- | =ICMR(Indian Council of Medical Research).1976.Medicinal Plants of India.Vol.1.Indian Council of Med. Res.Cambridge Printing Works, New Delhi.487 pp;ICMR.1987.Medicinal Plants of India.Vol.2.Indian Council of Med. Res.Cambr. Printing Works,New Delhi.600pp | |
| Eucalyptus citriodora | Essential Oil | -- | -- | * | |
| Eruca sativa | Hs | -- | -- | * | |
| Alpinia officinarum | Rhizome | -- | -- | Wealth of India. | |
| Ribes nigrum | Fruit | -- | -- | List, P.H. and Horhammer, L., Hager's Handbuch der Pharmazeutischen Praxis, Vols. 2-6, Springer-Verlag, Berlin, 1969-1979. | |
| Rosa damascena | Essential Oil | -- | -- | * |