| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Inula helenium | Root | 99000.0 | 450000.0 | 0.7 | * |
| Lactuca scariola | Root | -- | -- | * | |
| Menyanthes trifoliata | Root | -- | -- | List, P.H. and Horhammer, L., Hager's Handbuch der Pharmazeutischen Praxis, Vols. 2-6, Springer-Verlag, Berlin, 1969-1979. | |
| Momordica charantia | Fruit | -- | 10000.0 | Jim Duke's personal files. | |
| Momordica charantia | Tissue Culture | -- | 19000.0 | Jim Duke's personal files. | |
| Parthenium integrifolium | Root | 24000.0 | 150000.0 | -0.6 | * |
| Petasites hybridus | Rhizome | -- | 35000.0 | -1.0 | List, P.H. and Horhammer, L., Hager's Handbuch der Pharmazeutischen Praxis, Vols. 2-6, Springer-Verlag, Berlin, 1969-1979. |
| Petasites japonicus | Root | -- | 170000.0 | -0.5 | * |
| Platycodon grandiflorum | Root | -- | -- | * | |
| Punica granatum | Pericarp | -- | 10000.0 | ANON. 1948-1976. The Wealth of India raw materials. Publications and Information Directorate, CSIR, New Delhi. 11 volumes. | |
| Punica granatum | Petiole | -- | 10000.0 | * | |
| Saussurea lappa | Root | -- | 180000.0 | -0.5 | * |
| Solidago virgaurea | Root | -- | -- | * | |
| Taraxacum officinale | Plant | -- | -- | * | |
| Taraxacum officinale | Root | 42900.0 | 300000.0 | 0.1 | * |
| Taraxacum mongolicum | Plant | -- | -- | * | |
| Tragopogon porrifolius | Root | -- | -- | * | |
| Tussilago farfara | Root | -- | -- | * | |
| Tussilago farfara | Flower | -- | -- | * |