| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Sambucus canadensis | Leaf | 35000.0 | 38000.0 | 1.4 | * |
| Scopolia carniolica | Leaf | -- | -- | CRC Handbook of Medicinal Herbs and/or CRC Handbook of Proximate Analyses | |
| Selenicereus grandiflorus | Flower | -- | -- | CRC Handbook of Medicinal Herbs and/or CRC Handbook of Proximate Analyses | |
| Serenoa repens | Fruit | -- | -- | * | |
| Smilax china | Leaf | -- | -- | * | |
| Solanum tuberosum | Shoot | -- | -- | * | |
| Solanum tuberosum | Flower | -- | -- | * | |
| Solidago gigantea | Leaf | -- | -- | * | |
| Solidago virgaurea | Leaf | -- | -- | * | |
| Sophora japonica | Leaf | -- | 40000.0 | 1.5 | * |
| Sophora japonica | Bud | 176000.0 | 229000.0 | * | |
| Sophora japonica | Fruit | -- | 25000.0 | 2.2 | * |
| Sophora japonica | Flower | 128000.0 | 140000.0 | 1.4 | * |
| Sorbus aucubaria | Fruit | -- | -- | * | |
| Spinacia oleracea | Shoot | -- | -- | * | |
| Spinacia oleracea | Leaf | -- | 170.0 | -1.0 | * |
| Stellaria media | Plant | -- | -- | List, P.H. and Horhammer, L., Hager's Handbuch der Pharmazeutischen Praxis, Vols. 2-6, Springer-Verlag, Berlin, 1969-1979. | |
| Stevia rebaudiana | Tissue Culture | -- | 7.0 | Kinghorn, A. D. (Ed.) 2002. Medicinal and Aromatic Plants - Industrial Profiles. Stevia. The genus Stevia. Taylor & Francis. New York, NY. 211 pp. | |
| Syringa vulgaris | Plant | -- | -- | J.S. Glasby Dict.Pls Containing 2ndary Metabolite. 1991. | |
| Tephrosia purpurea | Leaf | -- | -- | * |