| Physaria schaffneri (S. Watson) O'Kane & Al-Shehbaz, 2002 |
| Physaria sinuosa (Rollins) O'Kane & Al-Shehbaz, 2002 |
| Physaria tenella (A. Nelson) O'Kane & Al-Shehbaz, 2002 |
| Physaria thamnophila (Rollins & E.A. Shaw) O'Kane & Al-Shehbaz, 2002 |
| Physaria thamnophila subsp. loretensis Sedio, R.J. Williams, D.M. Price, C.F. Best, A. Contr., Manhart & Pepper, 2023 |
| Physaria vigana B.L. Turner, 2007 |
| Physaria wyndii (Rollins & E.A. Shaw) O'Kane & Al-Shehbaz, 2002 |
| Physarieae B. L. Rob., 1895 |
| Physolepidium Endl., 1842 |
| Pirazzia Chiov., 1919 |
| Pirea T. Durand, 1888 |
| Planodes Greene, 1912 |
| Planodes mexicanum (S. Watson) Rollins, 1941 |
| Planodes virginicum (L.) Greene, 1912 |
| Pleiocardia Greene, 1904 |
| Pleurophragma Rydb., 1907 |
| Poliophyton O.E. Schulz, 1933 |
| Poliophyton pubens (A. Gray) O.E. Schulz, 1933 |
| Porphyrocodon Hook. f., 1862 |
| Pritzelago Kuntze, 1891 |