| Trachypogon spicatus (L. f.) Kuntze, 1891 |
| Trachypogon stipoides (Kunth) Nees, 1829 |
| Traginae P.M. Peterson & Columbus, 2007 |
| Tragus Panz., 1813 |
| Tragus Haller, 1768 |
| Tragus alienus (Spreng.) Schult., 1824 |
| Tragus berteronianus Schult., 1824 |
| Tragus occidentalis Nees, 1829 |
| Tragus unioloides (Willd.) B.D. Jacks., 1895 |
| Tremularia Heist. ex Fabr., 1759 |
| Triachyrum Hochst. ex A. Braun, 1841 |
| Triaena Kunth, 1815 |
| Triaena racemosa Kunth, 1815 |
| Trianthium Desv., 1831 |
| Triarrhena (Maxim.) Nakai, 1950 |
| Triathera Desv., 1810 |
| Triathera americana (L.) Desv., 1810 |
| Triathera aristidoides (Kunth) Nash, 1903 |
| Triathera gracilis E. Fourn., 1886 |
| Triatherus Raf., 1818 |