| Mapouria stipulata Oerst., 1863 |
| Mapouria trichogyme Müll. Arg., 1881 |
| Margaritopsis C. Wright, 1869 |
| Margaritopsis microdon (DC.) C.M. Taylor, 2005 |
| Martensianthus Borhidi & Lozada-Pérez, 2011 |
| Martensianthus albiflorus (Borhidi & E. Martínez) Borhidi, 2011 |
| Martensianthus breviflorus (Borhidi & Salas-Mor.) Borhidi, 2011 |
| Martensianthus galeottii (Borhidi & Salas-Mor.) Borhidi & Lozada-Pérez, 2011 |
| Martensianthus macdougallii (Lorence) Borhidi & Lozada-Pérez, 2011 |
| Martensianthus micranthus (Borhidi) Borhidi, 2011 |
| Martensianthus viticellus (Lorea-Hern. & Lozada-Pérez) Borhidi, 2011 |
| Mexocarpus Borhidi, E. Martínez & Ramos, 2015 |
| Mexocarpus tetragonus (Donn. Sm.) Borhidi, E. Martínez & Ramos, 2015 |
| Mexotis Terrell & H. Rob., 2009 |
| Mexotis galeottii (M. Martens) Terrell & H. Rob., 2009 |
| Mexotis kingii (Terrell) Terrell & H. Rob., 2009 |
| Mexotis latifolia (M. Martens & Galeotti) Terrell & H. Rob., 2009 |
| Mexotis lorencei Terrell & H. Rob., 2009 |
| Mexotis terrellii (Lorence) Terrell & H. Rob., 2009 |
| Microsplenium Hook. f., 1873 |