| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Tilia sp. | Flower | -- | -- | * | |
| Althaea officinalis | Flower | -- | 1900.0 | * | |
| Rosa spp | Fruit | -- | -- | * | |
| Pteridium aquilinum | Plant | -- | -- | * | |
| Helianthemum glomeratum | Leaf | -- | -- | Meckes, M., Calzada, F., Tapia-Contreras, A., Cedillo-Rivera, R. 1999. Antiprotozoal Properties of Helianthemum glomeratum. Phytotherapy Research, 13(2): 102-105. | |
| Althaea officinalis | Leaf | -- | 2500.0 | * |