| Macromeria exserta D. Don, 1832 |
| Macromeria exserta var. imparata J.F. Macbr., 1917 |
| Macromeria guatemalense Donn. Sm., 1899 |
| Macromeria hintoniorum B.L. Turner, 1994 |
| Macromeria hispida M. Martens & Galeotti, 1844 |
| Macromeria leonotis I.M. Johnst., 1935 |
| Macromeria longiflora Sessé & Moc. ex D. Don, 1832 |
| Macromeria longiflora var. hispida (M. Martens & Galeotti) DC., 1846 |
| Macromeria notata I.M. Johnst., 1954 |
| Macromeria pringlei Greenm., 1899 |
| Macromeria viridiflora DC., 1846 |
| Mertensia Roth, 1797 |
| Mertensia mexicana L.O. Williams, 1937 |
| Mimophytum Greenm., 1905 |
| Mimophytum benitomartinezii Pérez-Calix & Pat.-Sicil., 2009 |
| Mimophytum cardiophyllum (A. Gray ex Hemsl.) R.R. Mill ex Holstein & Weigend, 2016 |
| Mimophytum carranzae (G.L. Nesom) Holstein & Weigend, 2016 |
| Mimophytum chiangii (L.C. Higgins) Holstein & Weigend, 2016 |
| Mimophytum mexicanum (S. Watson) R.R. Mill ex Holstein & Weigend, 2016 |
| Mimophytum omphalodoides Greenm., 1905 |