| 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 |
| Melanosinapis K.F. Schimp. & Spenn., 1829 |
| Mesoreanthus Greene, 1904 |
| Microcardamum O.E. Schulz, 1928 |
| Microsisymbrium O.E. Schulz, 1924 |
| Microthlaspi F.K. Mey., 1973 |
| Mitophyllum Greene, 1904 |
| Monoploca Bunge, 1845 |
| Mostacillastrum O.E. Schulz, 1924 |
| Mostacillastrum arcuatum (Rollins) Al-Shehbaz, 2012 |
| Mostacillastrum gracielae (M. Martínez & L. Hern.) Al-Shehbaz & M. Martínez, 2014 |
| Mostacillastrum incisum (Rollins) Al-Shehbaz, 2012 |