| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Acacia senegal | Leaf | -- | -- | Chemical Constituents of Oriental Herbs (3 diff. books) | |
| Dianthus barbatus | Shoot | -- | -- | * | |
| Ononis spinosa | Plant | -- | -- | List, P.H. and Horhammer, L., Hager's Handbuch der Pharmazeutischen Praxis, Vols. 2-6, Springer-Verlag, Berlin, 1969-1979. | |
| Pinus strobus | Fruit | -- | -- | * | |
| Glycine max | Seed | -- | -- | * | |
| Glycine max | Stem | -- | -- | * |