| Heliotropium queretaroanum I.M. Johnst., 1948 |
| Heliotropium racemosum (Rose & Standl.) I.M. Johnst., 1964 |
| Heliotropium rigidulum DC., 1845 |
| Heliotropium rufipilum (Benth.) I.M. Johnst., 1928 |
| Heliotropium rugosum M. Martens & Galeotti, 1844 |
| Heliotropium rupestre M. Martens & Galeotti, 1844 |
| Heliotropium saxatile Brandegee, 1905 |
| Heliotropium sessei I.M. Johnst., 1937 |
| Heliotropium tenellum (Nutt.) Torr., 1853 |
| Heliotropium ternatum Vahl, 1794 |
| Heliotropium torreyi I.M. Johnst., 1959 |
| Heliotropium transalpinum Vell., 1825 |
| Heliotropium trinitense Urb., 1912 |
| Heliotropium verdcourtii Craven, 2005 |
| Heliotropium wigginsii I.M. Johnst., 1948 |
| Messerschmidia L. ex Hebenstr., 1763 |
| Messerschmidia chrysantha M. Martens & Galeotti, 1844 |
| Messerschmidia hirsutissima (L.) Roem. & Schult., 1819 |
| Messerschmidia syringifolia (Vahl) Roem. & Schult., 1819 |
| Myriopus Small, 1933 |