| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Berberis vulgaris | Plant | -- | -- | * | |
| Mahonia aquifolium | Shoot | -- | -- | Khusainova, K. S. and Sadykov, Y. D. 1986. Alkaloids from Aerial Parts of Mahonia aquifolium. Izv Akad Nauk Tadzh Ssr Otd Fiz Mat Khim Geol Nauk, 1: 41-46. | |
| Mahonia aquifolium | Seed | -- | -- | Kostalova, D., Hrochova, V., Tomko, J. 1986. Tertiary Alkaloids of Mahonia aquifolium (Pursh) Nutt. III. Chem Pap, 40(3): 389-394. | |
| Stephania tetrandra | Plant | -- | -- | * |