| Mucuna sloanei Fawc. & Rendle, 1917 |
| Mucuna urens (L.) Medik., 1787 |
| Mucuna utilis Wall. ex Wight, 1840 |
| Muellera L. f., 1782 |
| Muellera frutescens (Aubl.) Standl., 1933 |
| Muellera mexicana (Zucc.) Benth., 1860 |
| Muellera monilis (L.) M.J. Silva & A.M.G. Azevedo, 2012 |
| Muellera unifoliolata (Benth.) M. Sousa, 2012 |
| Myrmecodendron Britton & Rose, 1928 |
| Myrmecodendron collinsii (Saff.) Britton & Rose, 1928 |
| Myrmecodendron donnellianum (Saff.) Britton & Rose, 1928 |
| Myrmecodendron globuliferum (Saff.) Britton & Rose, 1928 |
| Myrmecodendron hindsii (Benth.) Britton & Rose, 1928 |
| Myrospermum Jacq., 1760 |
| Myrospermum emarginatum Klotzsch, 1857 |
| Myrospermum frutescens Jacq., 1760 |
| Myrospermum frutescens var. emarginatum (Klotzsch) M. Gómez, 1894 |
| Myrospermum pereirae Royle, 1853 |
| Myrospermum secundum Klotzsch, 1857 |
| Myrospermum sonsonatense Pereira ex Oerst., 1855 |