| Helianthus oaxacanus Greenm., 1903 |
| Helianthus paradoxus Heiser, 1958 |
| Helianthus parviflorus Kunth, 1818 |
| Helianthus petiolaris Nutt., 1821 |
| Helianthus petiolaris subsp. fallax Heiser, 1958 |
| Helianthus petiolaris var. canescens A. Gray, 1852 |
| Helianthus petiolaris var. canus Britton, 1894 |
| Helianthus petiolaris var. fallax (Heiser) B.L. Turner, 1990 |
| Helianthus petiolaris var. petiolaris Nutt., 1821 |
| Helianthus praecox Engelm. & A. Gray, 1847 |
| Helianthus quinquenervis Hook., 1847 |
| Helianthus quinqueradiatus Cav., 1795 |
| Helianthus similis (Brandegee) S.F. Blake, 1918 |
| Helianthus strumosus L., 1753 |
| Helianthus tephrodes A. Gray, 1858 |
| Helianthus tetragonus Moc. ex DC., 1836 |
| Helianthus tetrapterus Ortega, 1798 |
| Helianthus tomentosus Michx., 1803 |
| Helianthus trilobatus Link, 1822 |
| Helianthus triqueter Ortega, 1798 |