| Ipomoea wolcottiana Rose, 1894 |
| Ipomoea wolcottiana var. wolcottiana Rose, 1894 |
| Ipomoea wrightii A. Gray, 1878 |
| Ipomoea x leucantha Jacq., 1789 |
| Ipomoea zacatecana J.R.I.Wood & Scotland, 2020 |
| Ipomoea zimmermanii McDonald, 1987 |
| Ipomoeeae Hall. f., 1893 |
| Iseia O'Donell, 1953 |
| Iseia luxurians (Moric.) O'Donell, 1953 |
| Itzaea Standl. & Steyerm., 1944 |
| Itzaea sericea (Standl.) Standl. & Steyerm., 1944 |
| Jacquemontia Choisy, 1834 |
| Jacquemontia abutiloides Benth., 1844 |
| Jacquemontia abutiloides var. eastwoodiana (I.M. Johnst.) Wiggins, 1950 |
| Jacquemontia agrestis (Mart. ex Choisy) Meisn., 1869 |
| Jacquemontia albida Wiggins & Rollins, 1943 |
| Jacquemontia azurea (Desr.) Choisy, 1833 |
| Jacquemontia ciliata Sandwith, 1930 |
| Jacquemontia ciliata var. nelsonii (House) Robertson, 1930 |
| Jacquemontia confusa Meisn., 1869 |