| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Crataegus laevigata | Flower | -- | -- | * | |
| Crataegus laevigata | Branches | -- | -- | * | |
| Crataegus laevigata | Leaf | -- | -- | * | |
| Crataegus laevigata | Bark | -- | -- | * | |
| Crataegus rhipidophylla | Flower | -- | -- | * | |
| Crataegus rhipidophylla | Branches | -- | -- | * | |
| Crataegus rhipidophylla | Leaf | -- | -- | * | |
| Crataegus rhipidophylla | Bark | -- | -- | * | |
| Crataegus laevigata | Fruit | -- | -- | Pedersen, M. 1987. Nutritional Herbology. Pederson Publishing. Bountiful, Utah. 377 pp. | |
| Crataegus rhipidophylla | Fruit | -- | -- | Pedersen, M. 1987. Nutritional Herbology. Pederson Publishing. Bountiful, Utah. 377 pp. |