| Ipomoea alata Rose, 1891 |
| Ipomoea alatipes Hook. f., 1862 |
| Ipomoea alba L., 1753 |
| Ipomoea amnicola Morong, 1892 |
| Ipomoea ampullacea Fernald, 1897 |
| Ipomoea ancisa House, 1908 |
| Ipomoea angustata Brandegee, 1913 |
| Ipomoea anisomeres B.L. Rob. & Bartlett, 1907 |
| Ipomoea aquatica Forssk., 1775 |
| Ipomoea arborescens (Humb. & Bonpl. ex Willd.) G. Don, 1838 |
| Ipomoea arborescens var. arborescens (Humb. & Bonpl. ex Willd.) G. Don, 1838 |
| Ipomoea arborescens var. pachylutea Gentry, 1942 |
| Ipomoea argentifolia A. Rich. ex Sagra, 1850 |
| Ipomoea aristolochiifolia G. Don, 1838 |
| Ipomoea armata Roem. & Schult., 1819 |
| Ipomoea armentalis L.O. Williams, 1970 |
| Ipomoea asarifolia (Desr.) Roem. & Schult., 1819 |
| Ipomoea aurantiaca L.O. Williams, 1970 |
| Ipomoea barbatisepala A. Gray, 1886 |
| Ipomoea batatas (L.) Lam., 1793 |