| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Tussilago farfara | Leaf | -- | 170000.0 | 0.7 | * |
| Tussilago farfara | Rhizome | -- | -- | * | |
| Viburnum prunifolium | Root Bark | -- | 20000.0 | -1.4 | Leung, A.Y., Encyclopedia of Common Natural Ingredients Used in Food, Drugs, and Cosmetics, John Wiley & Sons, New York, 1980. |
| Catharanthus roseus | Leaf | -- | -- | CRC Handbook of Medicinal Herbs and/or CRC Handbook of Proximate Analyses | |
| Actaea cimicifuga | Rhizome | -- | -- | * | |
| Berberis vulgaris | Fruit | -- | 55600.0 | -0.4 | Jim Duke's personal files. |
| Ocimum sanctum | Plant | -- | -- | ANON. 1948-1976. The Wealth of India raw materials. Publications and Information Directorate, CSIR, New Delhi. 11 volumes. | |
| Acacia tortilis | Bark | -- | -- | * | |
| Acacia tortilis | Leaf | -- | -- | * | |
| Ailanthus altissima | Leaf | -- | 120000.0 | 0.1 | * |
| Mercurialis annua | Root | -- | 33500.0 | -1.3 | * |
| Liquidambar styraciflua | Plant | -- | -- | * | |
| Viola tricolor | Plant | -- | -- | * | |
| Salvia sclarea | Plant | -- | -- | CRC Handbook of Medicinal Herbs and/or CRC Handbook of Proximate Analyses | |
| Cynara cardunculus | Plant | -- | -- | * | |
| Ficus carica | Leaf | -- | 36000.0 | -0.9 | Blaschek, W., Hansel, R., Keller, K., Reichling, J., Rimpler, H., and Schneider, G. eds. 1998. Hager's Handbuch der Pharmazeutischen Praxis, Auflage Band 2 (A-K), 909 pp., (L-Z), 858 pp. Springer-Verlag, Berlin. |
| Bryonia alba | Root | -- | -- | * | |
| Alnus glutinosa | Bark | -- | 200000.0 | 0.5 | * |
| Asclepias syriaca | Sprout Seedling | -- | -- | * | |
| Fragaria spp | Leaf | -- | -- | * |