| Tricuspis P. Beauv., 1812 |
| Tricuspis (Triplasis) (P. Beauv.) A. Gray, 1848 |
| Tridens Roem. & Schult., 1817 |
| Tridens albescens (Vasey) N.T. Burb., 1946 |
| Tridens albescens (Vasey) Wooton & Standl., 1912 |
| Tridens ambiguus (Elliott) Schult., 1824 |
| Tridens avenaceus (Kunth) Hitchc., 1913 |
| Tridens avenaceus var. avenaceus (Kunth) Hitchc., 1913 |
| Tridens duartei Catasús, 1980 |
| Tridens eragrostoides (Vasey & Scribn.) Nash, 1903 |
| Tridens flavus (L.) Hitchc., 1906 |
| Tridens flavus f. cuprea (Jacq.) Fosberg, 1957 |
| Tridens flavus var. aristatus (Scribn. & C.R. Ball) Shinners, 1954 |
| Tridens grandiflora (Vasey) Wooton & Standl., 1912 |
| Tridens muticus (Torr.) Nash, 1903 |
| Tridens nealleyi (Vasey) Wooton & Standl., 1912 |
| Tridens pilosus (Buckley) Hitchc., 1913 |
| Tridens pulchellus (Kunth) Hitchc., 1912 |
| Tridens quinquefidus (Pursh) Roem. & Schult., 1817 |
| Tridens sesleroides Nash, 1903 |