| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Spondias dulcis | Fruit | -- | 1.9 | -0.8 | * |
| Spondias tuberosa | Fruit | -- | 1.45 | -0.8 | * |
| Symphoricarpos orbiculatus | Stem | 3.0 | 26.0 | -0.4 | * |
| Syzygium aromaticum | Fruit | 10.0 | 40.0 | 0.0 | * |
| Syzygium aromaticum | Flower | 10.0 | 40.0 | -0.0 | * |
| Taraxacum officinale | Leaf | 4.0 | 125.0 | 1.7 | Betting on Boron, Unpublished draft by J. A. Duke on file at USDA, draft and papers relating to boron percentages. Includes Internat. Z. Vit. Ern. Forschung 43:1973 (boron). |
| Tephrosia candida | Plant | -- | 32.0 | -0.5 | * |
| Thymus vulgaris | Plant | 34.0 | 48.0 | -0.3 | Betting on Boron, Unpublished draft by J. A. Duke on file at USDA, draft and papers relating to boron percentages. Includes Internat. Z. Vit. Ern. Forschung 43:1973 (boron). |
| Trifolium pratense | Stem | -- | 16.0 | -1.1 | * |
| Trifolium pratense | Leaf | -- | 23.0 | -1.0 | * |
| Triticum aestivum | Seed | 1.0 | 16.0 | -0.4 | * |
| Urtica dioica | Leaf | 6.0 | 47.0 | -0.4 | * |
| Vaccinium myrtillus | Fruit | 0.6 | 10.0 | -0.6 | ACTA AGRIC SCAND SUPPL 22: 1980 |
| Vaccinium macrocarpon | Fruit | 1.0 | 8.0 | -0.6 | ACTA AGRIC SCAND SUPPL 22: 1980 |
| Vaccinium vitis-idaea | Fruit | 1.4 | 11.0 | -0.6 | * |
| Vaccinium corymbosum | Fruit | 0.1 | 13.0 | -0.5 | * |
| Valerianella locusta | Plant | 275.0 | 350.0 | 2.6 | * |
| Valerianella radicata | Plant | 13.8 | 16.6 | -0.6 | * |
| Valerianella locusta | Plant | 275.0 | 350.0 | 2.6 | * |
| Vigna unguiculata | Seed | 3.0 | 60.0 | 1.7 | * |