| Swamp Sunflower | Helianthus | angustifolius | | 44 | Aster Family | Asteraceae | Asterales | Magnoliopsida | Plantae |
| Common Sunflower | Helianthus | annuus | | 16 | Aster Family | Asteraceae | Asterales | Magnoliopsida | Plantae |
| Cucumberleaf Sunflower | Helianthus | debilis ssp. cucumerifolius | | 0 | Aster Family | Asteraceae | Asterales | Magnoliopsida | Plantae |
| Thin-leaved Sunflower | Helianthus | decapetalus | | 74 | Aster Family | Asteraceae | Asterales | Magnoliopsida | Plantae |
| Woodland Sunflower | Helianthus | divaricatus | | 65 | Aster Family | Asteraceae | Asterales | Magnoliopsida | Plantae |
| Giant Sunflower | Helianthus | giganteus | | 24 | Aster Family | Asteraceae | Asterales | Magnoliopsida | Plantae |
| Saw-toothed Sunflower | Helianthus | grosseserratus | | 3 | Aster Family | Asteraceae | Asterales | Magnoliopsida | Plantae |
| Hairy Sunflower | Helianthus | hirsutus | | 3 | Aster Family | Asteraceae | Asterales | Magnoliopsida | Plantae |
| Smooth Sunflower | Helianthus | laevigatus | | 1 | Aster Family | Asteraceae | Asterales | Magnoliopsida | Plantae |
| Maximilian Sunflower | Helianthus | maximiliani | | 1 | Aster Family | Asteraceae | Asterales | Magnoliopsida | Plantae |
| Ashy Sunflower | Helianthus | mollis | | 15 | Aster Family | Asteraceae | Asterales | Magnoliopsida | Plantae |
| Few-leaved Sunflower | Helianthus | occidentalis ssp. occidentalis | | 5 | Aster Family | Asteraceae | Asterales | Magnoliopsida | Plantae |
| Stiff Sunflower | Helianthus | pauciflorus | | 3 | Aster Family | Asteraceae | Asterales | Magnoliopsida | Plantae |
| Pale-leaved Woodland Sunflower | Helianthus | strumosus | | 17 | Aster Family | Asteraceae | Asterales | Magnoliopsida | Plantae |
| Jerusalem Artichoke | Helianthus | tuberosus | | 63 | Aster Family | Asteraceae | Asterales | Magnoliopsida | Plantae |