| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Pimenta racemosa | Leaf | -- | -- | Lawrence, B.M., Essential Oils 1976-1977, Essential Oils 1978, Essential Oils 1979-1980. | |
| Tilia sp. | Flower | -- | -- | * | |
| Vanilla planifolia | Fruit | -- | 29.0 | * | |
| Achillea millefolium | Plant | -- | -- | * | |
| Rheum palmatum | Rhizome | -- | 0.5 | * | |
| Sambucus nigra | Flower | -- | 18720.0 | List, P.H. and Horhammer, L., Hager's Handbuch der Pharmazeutischen Praxis, Vols. 2-6, Springer-Verlag, Berlin, 1969-1979. | |
| Pimenta dioica | Plant | -- | -- | * | |
| Chrysanthemum x morifolium | Flower | -- | -- | Wealth of India. | |
| Brassica oleracea | Stem | -- | -- | * | |
| Glycyrrhiza glabra | Root | 0.1 | 34.0 | * |