| Phaseolus oligospermus Piper, 1926 |
| Phaseolus opacus Piper, 1926 |
| Phaseolus ovatifolius Piper, 1926 |
| Phaseolus ovatus Benth., 1837 |
| Phaseolus pachycarpus Standl., 1940 |
| Phaseolus palmeri Piper, 1926 |
| Phaseolus parabolicus Nutt. ex W.P.C. Barton, 1818 |
| Phaseolus parviflorus Schltdl., 1838 |
| Phaseolus parvifolius Freytag, 2002 |
| Phaseolus parvulus Greene, 1881 |
| Phaseolus pascuorum Mart. ex Benth., 1837 |
| Phaseolus pauciflorus Sessé & Moc. ex G. Don, 1832 |
| Phaseolus pauciflorus Benth., 1837 |
| Phaseolus pauciflorus Sessé & Moc., 1890 |
| Phaseolus pauper Standl., 1940 |
| Phaseolus pedatus Rose, 1903 |
| Phaseolus pedicellatus Benth., 1837 |
| Phaseolus pedicellatus var. grayanus (Wooton & Standl.) A. Delgado ex Isely, 1998 |
| Phaseolus peduncularis Kunth, 1824 |
| Phaseolus peduncularis (Muhl.) W.P.C. Barton, 1818 |