| Euploca Nutt., 1836 |
| Euploca aurea Rose & Standl., 1912 |
| Euploca axillaris (Greenm.) J. I. M. Melo, 2017 |
| Euploca convolvulacea Nutt., 1836 |
| Euploca fallax (I.M. Johnst.) J.I.M. Melo, 2017 |
| Euploca greggii (Torr.) Halse & Feuillet, 2016 |
| Euploca hintonii (I.M. Johnst.) M.W. Frohl. & M.W. Chase, 2020 |
| Euploca mexicana (A. DC.) M.W. Frohl. & M.W. Chase, 2020 |
| Euploca procumbens (Mill.) Diane & Hilger, 2003 |
| Euploca queretaroana (I.M. Johnst.) J.I.M. Melo, 2017 |
| Euploca sessei (I.M. Johnst.) J.I.M. Melo, 2017 |
| Euploca wigginsii (I.M. Johnst.) J.I.M. Melo, 2017 |
| Heliophytum (Cham.) A. DC., 1845 |
| Heliophytum macrostachyum DC., 1845 |
| Heliophytum parviflorum (L.) DC., 1845 |
| Heliotropiaceae Schrad., 1819 |
| Heliotropium L., 1753 |
| Heliotropium americanum Mill., 1768 |
| Heliotropium angiospermum Murray, 1770 |
| Heliotropium angustifolium Torr., 1859 |