| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Cuminum cyminum | Seed | -- | 1500.0 | * | |
| Acinos suaveolens | Shoot | -- | 50.0 | Jim Duke's personal files. | |
| Silybum marianum | Flower | -- | -- | * | |
| Glechoma hederacea | Plant | -- | -- | * | |
| Stevia rebaudiana | Leaf | -- | -- | Kinghorn, A. D. (Ed.) 2002. Medicinal and Aromatic Plants - Industrial Profiles. Stevia. The genus Stevia. Taylor & Francis. New York, NY. 211 pp. | |
| Agastache nepetoides | Inflorescence | -- | -- | Jim Duke's personal files. | |
| Agastache nepetoides | Leaf | -- | -- | Jim Duke's personal files. | |
| Chrysanthemum parthenium | Flower | -- | -- | * | |
| Thymus vulgaris | Plant | -- | -- | * | |
| Cnicus benedictus | Shoot | -- | -- | Jim Duke's personal files. | |
| Juniperus communis | Fruit | -- | -- | * | |
| Thymus vulgaris | Leaf | -- | -- | Duke, J. A. Writeups or information summaries on approximately 2,000 economic plants, USDA, ARS, Beltsville, MD 20705. | |
| Origanum majorana | Pollen Or Spore | -- | -- | * | |
| Origanum majorana | Shoot | -- | -- | * | |
| Agastache rugosa | Inflorescence | -- | -- | Jim Duke's personal files. | |
| Agastache rugosa | Leaf | -- | -- | Jim Duke's personal files. | |
| Marrubium vulgare | Shoot | -- | -- | * | |
| Marrubium vulgare | Leaf | -- | -- | * | |
| Origanum vulgare | Shoot | -- | -- | * | |
| Lawsonia inermis | Leaf | -- | -- | * |