| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Actaea racemosa | Plant | -- | -- | * | |
| Caulophyllum thalictroides | Plant | -- | -- | Jim Duke's personal files. | |
| Caulophyllum thalictroides | Root | 132.0 | 909.0 | * | |
| Cimicifuga racemosa | Plant | -- | -- | * | |
| Genista tinctoria | Shoot | -- | -- | * | |
| Sophora japonica | Seed | -- | -- | * | |
| Sophora secundiflora | Plant | -- | -- | * | |
| Spartium junceum | Flower | -- | -- | * |