| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Psophocarpus tetragonolobus | Leaf | 2450.0 | 10583.0 | -0.6 | * |
| Psoralea esculenta | Root | -- | 1730.0 | -1.4 | 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. |
| Punica granatum | Fruit | -- | -- | * | |
| Pyrus communis | Fruit | 140.0 | 865.0 | -0.7 | * |
| Raphanus sativus | Root | 320.0 | 6200.0 | 1.2 | * |
| Rehmannia glutinosa | Root | 1000.0 | 7000.0 | 1.7 | * |
| Ribes nigrum | Fruit Juice | -- | 170.0 | * | |
| Rosmarinus officinalis | Leaf | 1650.0 | 5120.0 | -2.1 | USDA's Ag Handbook 8 and sequelae) |
| Sambucus canadensis | Fruit | 330.0 | 1634.0 | -0.6 | USDA's Ag Handbook 8 and sequelae) |
| Secale cereale | Seed | 7470.0 | 8390.0 | -0.4 | USDA's Ag Handbook 8 and sequelae) |
| Sechium edule | Fruit | 690.0 | 9860.0 | 1.1 | * |
| Senna obtusifolia | Seed | -- | 7420.0 | -0.6 | * |
| Sesamum indicum | Seed | 5490.0 | 15527.0 | 0.4 | * |
| Sinapis alba | Seed | 13250.0 | 14178.0 | 0.3 | * |
| Solanum tuberosum | Tuber | 117.0 | 6450.0 | -0.2 | * |
| Solanum melongena | Fruit | 550.0 | 7063.0 | 0.5 | * |
| Spinacia oleracea | Plant | 1610.0 | 19120.0 | 1.6 | USDA's Ag Handbook 8 and sequelae) |
| Stachys officinalis | Shoot | -- | -- | * | |
| Theobroma cacao | Seed | -- | 5700.0 | -0.8 | ANON. 1948-1976. The Wealth of India raw materials. Publications and Information Directorate, CSIR, New Delhi. 11 volumes. |
| Thymus vulgaris | Plant | 5020.0 | 5422.0 | -0.6 | USDA's Ag Handbook 8 and sequelae) |