| Ipomoea orizabensis var. collina (House) J.A. McDonald, 2001 |
| Ipomoea orizabensis var. orizabensis (Pelletan) Steud., 1841 |
| Ipomoea painteri House, 1907 |
| Ipomoea parasitica (Kunth) G. Don, 1838 |
| Ipomoea passifloroides House, 1908 |
| Ipomoea pauciflora M. Martens & Galeotti, 1845 |
| Ipomoea pauciflora subsp. pauciflora M. Martens & Galeotti, 1845 |
| Ipomoea pedicellaris Benth., 1845 |
| Ipomoea peduncularis Bertol., 1840 |
| Ipomoea perpartita McPherson, 1980 |
| Ipomoea perplexa L.O. Williams, 1970 |
| Ipomoea pes-caprae (L.) R. Br., 1818 |
| Ipomoea petrophila House, 1907 |
| Ipomoea philomega (Vell.) House, 1908 |
| Ipomoea plummerae A. Gray, 1886 |
| Ipomoea pochutlensis J.R.I.Wood & Scotland, 2020 |
| Ipomoea populina House, 1908 |
| Ipomoea praecana House, 1908 |
| Ipomoea proximum (M. Martens & Galeotti) Hemsl., 1882 |
| Ipomoea pruinosa McPherson, 1980 |