| Trifolium morleyanum Greene, 1895 |
| Trifolium mucronatum Willd. ex Spreng., 1826 |
| Trifolium mucronatum subsp. lacerum (Greene) J.M. Gillett, 1980 |
| Trifolium mucronatum subsp. mucronatum Willd. ex Spreng., 1826 |
| Trifolium mucronatum subsp. vaughanae J.M. Gillett, 1980 |
| Trifolium nelsonii House, 1906 |
| Trifolium olivaceum Greene, 1887 |
| Trifolium ortegae Greene, 1897 |
| Trifolium ortegae f. pumilum Vaughan, 1939 |
| Trifolium oxypetalum Fisch. & C.A. Mey., 1845 |
| Trifolium palmeri S. Watson, 1876 |
| Trifolium pinetorum Greene, 1894 |
| Trifolium potosanum Lojac., 1883 |
| Trifolium pratense L., 1753 |
| Trifolium reflexum L., 1753 |
| Trifolium reflexum var. reflexum L., 1753 |
| Trifolium repens L., 1753 |
| Trifolium repens var. giganteum Lagr.-Foss., 1847 |
| Trifolium rhombeum S. Schauer, 1847 |
| Trifolium roseum D.Heller & Zohary, 1984 |