| Lyrocarpa palmeri S. Watson, 1876 |
| Lyrocarpa xanti Brandegee, 1889 |
| Machaerophorus Schltdl., 1857 |
| Malcolmia W.T. Aiton, 1812 |
| Malcolmia graeca Boiss. & Spruner, 1843 |
| Malcolmieae Al-Shehbaz & Warwick, 2007 |
| Mancoa Wedd., 1859 |
| Mancoa bracteata (S. Watson) Rollins, 1941 |
| Mancoa henricksonii Rollins, 1976 |
| Mancoa laxa Rollins, 1957 |
| Mancoa mexicana Gilg & Muschl., 1909 |
| Mancoa perennis L. Hern. & M. Martínez, 2013 |
| Mancoa pubens (A. Gray) Rollins, 1941 |
| Mancoa rollinsiana Calderón, 1977 |
| Mancoa stylosa Rollins, 1976 |
| Masmenia F.K. Mey., 1973 |
| Mathiolaria Chevall., 1836 |
| Matthiola W.T. Aiton, 1812 |
| Matthiola incana (L.) W.T. Aiton, 1812 |
| Matthioleae Rech. f., 1968 |