| Tilia houghii Rose, 1905 |
| Tilia longipes Bush, 1929 |
| Tilia mexicana Schltdl., 1837 |
| Tilia occidentalis Rose, 1905 |
| Tilioideae Arn., 1832 |
| Trichospermum Blume, 1825 |
| Trichospermum galeottii (Turcz.) Kosterm., 1962 |
| Trichospermum grandifolium Kosterm., 1962 |
| Trichospermum grewiifolium (A. Rich.) Kosterm., 1962 |
| Trichospermum insigne (Baill.) Kosterm., 1962 |
| Trichospermum lessertianum (Hochr.) Dorr, 2011 |
| Trichospermum mexicanum (DC.) Baill., 1872 |
| Trichospermum reticulatum Kosterm., 1962 |
| Trichospermum tabascanum (Sprague) Kosterm.,1962 |
| Triumfetta L., 1753 |
| Triumfetta acahuizotlanensis Gonz.-Martínez, J. Jiménez Ram. & Rios-Carr., 2016 |
| Triumfetta acracantha Hochr., 1914 |
| Triumfetta althaeoides Lam., 1791 |
| Triumfetta apetala Hochr., 1914 |
| Triumfetta arborescens (Seem.) Sprague, 1923 |