| Ophryoscleria schiedeana (Schltdl.) Liebm., 1850 |
| Oreobolinae R.L. Barrett, 2021 |
| Oreobolus R. Br., 1810 |
| Oxycaryum Nees, 1842 |
| Oxycaryum cubense (Poepp. & Kunth) Lye, 1971 |
| Oxycaryum schomburgkianum Nees, 1842 |
| Papyrus Willd., 1816 |
| Papyrus antiquorum Willd., 1815 |
| Papyrus comosa Kunth, 1815 |
| Papyrus elegans Schrad. ex Nees, 1842 |
| Phaeocephalum Ehrh. ex House, 1920 |
| Phaeocephalum filifolium (A. Gray) House, 1920 |
| Psilocarya Torr., 1836 |
| Psilocarya nitens (Vahl) Alph. Wood, 1870 |
| Psilocarya robusta (Kunth) Nees, 1842 |
| Psilocarya rufa Nees, 1842 |
| Psilocarya velutina (Kunth) Nees, 1842 |
| Pycreus P. Beauv., 1816 |
| Pycreus albomarginatus Mart. & Schrad. ex Nees, 1842 |
| Pycreus angulatus Nees, 1834 |