| Mentzelioideae Gilg, 1894 |
| Microsperma Hook., 1839 |
| Microsperma bartonioides (Zucc.) Walp., 1845 |
| Microsperma grandiflora Groenland, 1861 |
| Microsperma lobatum Hook., 1839 |
| Nasa Weigend, 2006 |
| Nasa rudis (Benth.) R.H.Acuña & Weigend, 2023 |
| Nasa triphylla (Juss.) Weigend, 2006 |
| Nasa triphylla subsp. rudis (Benth.) Weigend, 2006 |
| Nuttallia Raf., 1817 |
| Nuttallia involucrata (S. Watson) Davidson & Moxley, 1923 |
| Petalonychoideae Weigend, 2006 |
| Petalonyx A. Gray, 1854 |
| Petalonyx crenatus A. Gray ex S. Watson, 1882 |
| Petalonyx linearis Greene, 1885 |
| Petalonyx thurberi A. Gray, 1854 |
| Schismocarpus S.F. Blake, 1918 |
| Schismocarpus matudae Steyerm., 1953 |
| Schismocarpus pachypus S.F. Blake, 1918 |
| Sclerothrix C. Presl, 1834 |