| Porophyllum zimapanum B.L. Turner, 1983 |
| Praxelinae R.M. King & H. Rob., 1980 |
| Prenanthella Rydb., 1906 |
| Prenanthella exigua (A. Gray) Rydb., 1906 |
| Prenanthella japonica L., 1767 |
| Prenanthes L., 1753 |
| Prenanthes exigua A. Gray, 1853 |
| Prenanthes fruticosa Willd. ex Less., 1830 |
| Prenanthes pauciflora Torr., 1827 |
| Prionanthes Schrank, 1819 |
| Proustia Lag., 1811 |
| Proustia mexicana Lag. ex D. Don, 1830 |
| Proustia reticulata Lag. ex D. Don, 1830 |
| Psacaliopsis H. Rob. & Brettell, 1974 |
| Psacaliopsis macdonaldii (B.L. Turner) C. Jeffrey, 1992 |
| Psacaliopsis paneroi (B.L. Turner) C. Jeffrey, 1992 |
| Psacaliopsis paneroi var. juxtlahuacensis Panero & Villaseñor, 1996 |
| Psacaliopsis paneroi var. paneroi (B.L. Turner) C. Jeffrey, 1992 |
| Psacaliopsis pinetorum (Hemsl.) Funston & Villaseñor, 2008 |
| Psacaliopsis purpusii (Greenm.) H. Rob. & Brettell, 1974 |