| Pachyrhizus angulatus Rich. ex DC., 1825 |
| Pachyrhizus erosus (L.) Urb., 1905 |
| Pachyrhizus erosus var. palmatilobus (Moc. & Sessé ex DC.) R.T. Clausen, 1945 |
| Pachyrhizus ferrugineus (Piper) M. Sørensen, 1988 |
| Pachyrhizus strigosus R.T. Clausen, 1944 |
| Pachyrhizus vernalis R.T. Clausen, 1945 |
| Painteria Britton & Rose, 1928 |
| Painteria compacta (Rose) Britton & Rose, 1928 |
| Painteria elachistophylla (A. Gray ex S. Watson) Britton & Rose, 1928 |
| Painteria leptophylla (DC.) Britton & Rose, 1928 |
| Painteria revoluta (Rose) Britton & Rose, 1928 |
| Palmerocassia Britton, 1930 |
| Palmerocassia unijuga (Rose) Britton ex Britton & Rose, 1930 |
| Palmerocassia villosa Britton, 1930 |
| Palmerocassia wislizeni (A. Gray) Britton & Rose, 1930 |
| Papilionoideae DC., 1825 |
| Parkinsonia L., 1753 |
| Parkinsonia aculeata L., 1753 |
| Parkinsonia florida (Benth. ex A. Gray) S. Watson, 1876 |
| Parkinsonia microphylla Torr., 1857 |