| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Allium cepa | Bulb | 10000.0 | 11300.0 | * | |
| Eucalyptus rostratus | Plant | -- | -- | Okamura, H., Mimura, A., Yakou, Y., Niwano, M., and Takahara, Y. 1992. Antoxidant Activity of Tannins and Flavonoids in Eucalyptus rostrata. Phytochemistry. 33(3): 557-561. 1993. | |
| Crataegus laevigata | Leaf | -- | -- | Bisset, N.G., ed. 1994. Herbal Drugs and Phytopharmaceuticals. CRC Press. Boca Raton, FL. 566 pp. | |
| Filipendula ulmaria | Flower | -- | -- | * | |
| Allium cepa | Epidermis | -- | -- | Ito, Y., Ono, M., Masuoka, C., Yahara, S., Nohara, T. 1995. Hyaluronidase Inhibitors of Onion (Allium cepa L.) Skin. Kyushu Tokai Daigaku Nogakubu Kiyo, 14: 43-48. | |
| Crataegus monogyna | Leaf | -- | -- | * | |
| Crataegus monogyna | Flower | -- | -- | * | |
| Hamamelis virginiana | Leaf | -- | -- | * | |
| Althaea officinalis | Leaf | -- | -- | * | |
| Althaea officinalis | Flower | -- | -- | * |