| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Pelargonium graveolens | Essential Oil | 1.0 | 2.0 | * | |
| Skimmia arborescens | Leaf | -- | -- | ANON. 1948-1976. The Wealth of India raw materials. Publications and Information Directorate, CSIR, New Delhi. 11 volumes. | |
| Plectranthus coleoides | Shoot | -- | 70.0 | -1.0 | Buchbauer, G., Jorovetz, L., Wasicky, M. and Nikiforov, A. 1993. Volatile Constituents of the Headspace and Essential Oil of Plectranthus coleoides Marginatus (Labiatae). J. Ess. Oil Res. 5: 311-313. |
| Pelargonium roseum | Shoot | -- | 1548.0 | 1.0 | * |