| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Panax ginseng | Leaf | -- | -- | * | |
| Tulipa gesneriana | Stem | -- | -- | List, P.H. and Horhammer, L., Hager's Handbuch der Pharmazeutischen Praxis, Vols. 2-6, Springer-Verlag, Berlin, 1969-1979. | |
| Allium sativum var. sativum | Leaf | -- | -- | * | |
| Cryptotaenia japonica | Root | -- | -- | * | |
| Stachys officinalis | Shoot | -- | -- | * | |
| Melia azedarach | Seed | -- | -- | * | |
| Angelica sinensis | Root | -- | -- | Jim Duke's personal files. | |
| Lentinus edodes | Fruit | -- | -- | * | |
| Glycine max | Shoot | -- | -- | * | |
| Albizia lebbeck | Seed | -- | -- | Wealth of India. | |
| Coriandrum sativum | Fruit | -- | -- | * | |
| Oryza sativa | Hay | -- | -- | * | |
| Coriandrum sativum | Leaf | -- | -- | * | |
| Alpinia galanga | Leaf | -- | -- | * | |
| Cocos nucifera | Endosperm | -- | -- | Jim Duke's personal files. | |
| Cocos nucifera | Leaf | -- | -- | Jim Duke's personal files. | |
| Crocus sativus | Bulb | -- | -- | * | |
| Artemisia dracunculus | Root | -- | -- | * | |
| Camellia sinensis | Leaf | -- | -- | * | |
| Humulus lupulus | Fruit | -- | -- | List, P.H. and Horhammer, L., Hager's Handbuch der Pharmazeutischen Praxis, Vols. 2-6, Springer-Verlag, Berlin, 1969-1979. |