| Helianthus tubaeformis Jacq., 1798 |
| Helianthus tuberosus L., 1753 |
| Helianthus tuberosus var. subcanescens A. Gray, 1884 |
| Helichroa Raf., 1825 |
| Helichrysum Mill., 1754 |
| Helichrysum graveolens (M. Bieb.) Sweet, 1829 |
| Helichrysum lavandulaefolium Kunth, 1818 |
| Helichrysum lavandulifolium Kunth, 1818 |
| Helichrysum salicifolium Bertol., 1840 |
| Helicta Cass., 1818 |
| Heliomeris Nutt., 1848 |
| Heliomeris annua (M.E. Jones) Cockerell, 1918 |
| Heliomeris hispida (A. Gray) Cockerell, 1918 |
| Heliomeris longifolia (B.L. Rob. & Greenm.) Cockerell, 1918 |
| Heliomeris longifolia var. annua (M.E. Jones) W.F. Yates, 1979 |
| Heliomeris longifolia var. longifolia (B.L. Rob. & Greenm.) Cockerell, 1918 |
| Heliomeris multiflora Nutt., 1848 |
| Heliomeris multiflora var. hispida A. Gray, 1853 |
| Heliomeris multiflora var. macrocephala Heiser, 1979 |
| Heliomeris multiflora var. multiflora Nutt., 1848 |