| Trichodium noveboracense (Spreng.) Schult., 1827 |
| Trichodium perennans (Walter) Elliott, 1816 |
| Trichodium scabrum Darl., 1837 |
| Tricholaena Schrad. ex Schult. & Schult. f., 1824 |
| Tricholaena insularis (L.) Griseb., 1857 |
| Tricholaena obtecta (J. Presl) E. Fourn., 1885 |
| Tricholaena repens (Willd.) Hitchc., 1936 |
| Tricholaena repens var. rosea (Nees) Alberts., 1947 |
| Tricholaena rosea Nees, 1837 |
| Tricholaena saccharoides (Kunth) Griseb., 1857 |
| Tricholaena tonsa Nees, 1835 |
| Trichoneura Andersson, 1855 |
| Trichoneura elegans Swallen, 1932 |
| Trichoon Roth, 1798 |
| Trichoon phragmites (L.) Rendle, 1899 |
| Trichopyrum Á. Löve, 1986 |
| Trichopyrum intermedium (Host) Á. Löve, 1986 |
| Tricoforeas É. Desv., 1854 |
| Tricuspis P. Beauv., 1812 |
| Tricuspis (Triplasis) (P. Beauv.) A. Gray, 1848 |