| Ipomoea purpurea (L.) Roth, 1787 |
| Ipomoea purpurea var. diversifolia (Lindl.) O'Donell, 1953 |
| Ipomoea purpusii House, 1908 |
| Ipomoea quamoclit L., 1753 |
| Ipomoea ramosissima (Poir.) Choisy, 1845 |
| Ipomoea ramulosa J.R.I.Wood & Scotland, 2020 |
| Ipomoea reticulata O'Donell, 1953 |
| Ipomoea rhodocalyx A. Gray, 1887 |
| Ipomoea rhomboidea House, 1908 |
| Ipomoea robinsonii House, 1908 |
| Ipomoea rubens Choisy, 1834 |
| Ipomoea rubriflora O'Donell, 1959 |
| Ipomoea rupicola House, 1908 |
| Ipomoea rzedowskii E. Carranza, Zamudio & Murguía, 1998 |
| Ipomoea sabulosa House, 1908 |
| Ipomoea sagittata Poir., 1789 |
| Ipomoea sanguinea Vahl, 1794 |
| Ipomoea santae-rosae Standl. & Steyerm., 1944 |
| Ipomoea santillanii O'Donell, 1941 |
| Ipomoea schaffneri S. Watson, 1883 |