| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Houttuynia cordata | Shoot | -- | 1200.0 | -0.5 | * |
| Humulus lupulus | Fruit | -- | -- | CRC Handbook of Medicinal Herbs and/or CRC Handbook of Proximate Analyses | |
| Humulus lupulus | Leaf | -- | 2000.0 | -0.9 | * |
| Hydrangea paniculata | Flower | -- | 41000.0 | -0.1 | * |
| Hydrangea arborescens | Root | -- | -- | List, P.H. and Horhammer, L., Hager's Handbuch der Pharmazeutischen Praxis, Vols. 2-6, Springer-Verlag, Berlin, 1969-1979. | |
| Hyoscyamus niger | Leaf | -- | -- | * | |
| Hypericum perforatum | Flower | 1000.0 | 2800.0 | -0.7 | * |
| Hypericum perforatum | Plant | -- | 16000.0 | -0.4 | * |
| Hypericum perforatum | Stem | -- | -- | * | |
| Hypericum perforatum | Leaf | 2000.0 | 3000.0 | -0.8 | * |
| Hypericum perforatum | Shoot | -- | 10000.0 | 0.2 | * |
| Ilex paraguariensis | Leaf | -- | -- | * | |
| Illicium verum | Fruit | -- | -- | * | |
| Juniperus communis | Leaf | -- | -- | * | |
| Juniperus communis | Fruit | -- | -- | * | |
| Laurus nobilis | Leaf | -- | -- | * | |
| Leonurus cardiaca | Plant | -- | -- | Williamson, E. M. and Evans, F. J., Potter's New Cyclopaedia of Botanical Drugs and Preparations, Revised Ed., Saffron Walden, the C. W. Daniel Co., Ltd., Essex UK, 362 pp, 1988, reprint 1989. | |
| Ligustrum lucidum | Leaf | -- | -- | * | |
| Lycium chinense | Leaf | -- | -- | * | |
| Lycopersicon esculentum | Leaf | -- | 24000.0 | 0.5 | * |