| Melinia mexicana Brandegee, 1905 |
| Mesechiteae Miers, 1878 |
| Mesechites Müll. Arg., 1860 |
| Mesechites hirtellulus Miers, 1878 |
| Mesechites roseus (A. DC.) Miers, 1878 |
| Mesechites trifidus (Jacq.) Müll. Arg., 1860 |
| Metalepis Griseb., 1866 |
| Metalepis cubensis (A. Rich.) Griseb., 1866 |
| Metalepis peraffinis (Woodson) Morillo, 1991 |
| Metastelma R. Br., 1810 |
| Metastelma angustifolium Turcz., 1852 |
| Metastelma arenicola (Liede & Meve) Liede & Meve, 2014 |
| Metastelma arizonicum A. Gray, 1883 |
| Metastelma barbigerum Scheele, 1849 |
| Metastelma brachymischum W.D. Stevens, 2005 |
| Metastelma californicum Benth., 1844 |
| Metastelma chiapense A. Gray, 1886 |
| Metastelma collinum S.F. Blake, 1922 |
| Metastelma cuneatum Brandegee, 1905 |
| Metastelma decipiens Pittier, 1910 |