| Monochaetum floribundum (Schltdl.) Naudin, 1850 |
| Monochaetum guatemalense Standl. & Steyerm., 1944 |
| Monochaetum naudinianum Neumann, 1861 |
| Monochaetum oliganthum Naudin, 1850 |
| Monochaetum plumosum Naudin, 1850 |
| Monochaetum pringlei Rose, 1905 |
| Monochaetum pulchellum Naudin, 1850 |
| Monochaetum pulchrum Decne., 1848 |
| Monochaetum rivulare Naudin, 1845 |
| Monochaetum rubescens Gleason, 1938 |
| Monochaetum tenellum Naudin, 1850 |
| Monochaetum triplinerve Naudin, 1845 |
| Mouriri Aubl., 1775 |
| Mouriri exilis Gleason, 1940 |
| Mouriri gleasoniana Standl., 1940 |
| Mouriri muelleri Cogn., 1891 |
| Mouriri myrtilloides (Sw.) Poir., 1824 |
| Mouriri myrtilloides subsp. parvifolia (Benth.) Morley, 1971 |
| Olisbeoideae Burnett, 1835 |
| Oreocosmus Naudin, 1850 |