| Trachypogon preslii f. secundus (J. Presl) Andersson, 1857 |
| Trachypogon ramosus Swallen, 1957 |
| Trachypogon rigidifolius Swallen, 1966 |
| Trachypogon rufus Nees, 1829 |
| Trachypogon scrobiculatus Nees, 1829 |
| Trachypogon secundus (J. Presl) Scribn., 1901 |
| 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 |