| Sphaerosicyos Hook. f., 1867 |
| Sphenantha Schrad., 1838 |
| Tecunumania Standl. & Steyerm., 1944 |
| Tecunumania quetzalteca Standl. & Steyerm., 1944 |
| Trevouxia Scop., 1777 |
| Triceratia A. Rich., 1845 |
| Triceratia bryonioides A. Rich., 1845 |
| Triceratieae A. Rich., 1845 |
| Tristemon Scheele, 1848 |
| Tristemon texanum Scheele, 1848 |
| Tumamoca Rose, 1912 |
| Tumamoca macdougalii Rose, 1912 |
| Tumamoca mucronata Kearns, 1994 |
| Turia Forssk. ex J.F. Gmel., 1791 |
| Vaseyanthus Cogn., 1891 |
| Vaseyanthus brandegeei (Cogn.) Rose, 1897 |
| Vaseyanthus insularis (S. Watson) Rose, 1897 |
| Vaseyanthus insularis var. brandegei I.M. Johnst., 1924 |
| Vaseyanthus insularis var. inermis I.M. Johnst., 1924 |
| Vaseyanthus insularis var. insularis (S. Watson) Rose, 1897 |