T – T
| Tanacetum vulgare | Tansy |
| Taraxacum officinalis | Dandelion |
| Teucrium chamaedrys | Wall germander |
| Thymus serpyllum | Wild thyme |
| Thymus vulgaris | Thyme |
| Tilia argentea (T. tomentoea) | Silver linden |
| Tilia cordata (T. parvifolia) | Littleleaf linden |
| Tilia platyphyllos (T. graudifolia) | Largeleaf linden |
| Tormentilla erecta (Potentilla erecta) | Tormentil, Septfoil, Erect cinquefoil |
| Trifolium pratense | Red clover |
| Trifolium repens | White clover |
| Trigonella foenum graecum | Fenugreek |
| Triticum repens | Couch grass |
| Tussilago farfara | Coltsfoot |