| Psacalium villosum Villaseñor, Hinojosa & Redonda-Mart., 2018 |
| Psathurochaeta DC., 1836 |
| Psathyrotes A. Gray, 1853 |
| Psathyrotes incisa A. Gray, 1854 |
| Psathyrotes purpusii Brandegee, 1911 |
| Psathyrotes ramosissima (Torr.) A. Gray, 1868 |
| Psathyrotes scaposa A. Gray, 1853 |
| Psathyrotes schottii (A. Gray) A. Gray, 1874 |
| Psathyrotinae B.G. Baldwin, 2000 |
| Psathyrotopsis Rydb., 1927 |
| Psathyrotopsis hintoniorum B.L. Turner, 1993 |
| Psathyrotopsis purpusii (Brandegee) Rydb., 1927 |
| Psathyrotopsis scaposa (A. Gray) H. Rob., 1980 |
| Pseudelephantopus Rohr, 1792 |
| Pseudelephantopus spicatus (Juss. ex Aubl.) Rohr, 1792 |
| Pseudoagarista Mesfin & D.J. Crawford, 2023 |
| Pseudoagarista crawfordii Mesfin) Mesfin & D.J. Crawford, 2023 |
| Pseudoagarista davilae (Panero & Villaseñor) Mesfin & D.J. Crawford, 2023 |
| Pseudoagarista guanajuatensis (B.L. Turner) Mesfin & D.J. Crawford, 2023 |
| Pseudoagarista mcvaughii (D.J. Crawford) Mesfin & D.J. Crawford, 2023 |