| Aster jalapensis Fernald, 1900 |
| Aster laevis L., 1753 |
| Aster lanceolatus Willd., 1803 |
| Aster lanceolatus subsp. hesperius (A. Gray) Semple & Chmiel., 1987 |
| Aster lemmonii A. Gray, 1884 |
| Aster leonis Britton, 1920 |
| Aster lepidopodus B.L. Rob. & Fernald, 1894 |
| Aster lima Lindl., 1836 |
| Aster lindenii Sch. Bip., 1856 |
| Aster moranensis Kunth, 1818 |
| Aster moranensis var. moranensis Kunth, 1818 |
| Aster moranensis var. turneri S.D. Sundb. & A.G. Jones, 1986 |
| Aster novi-belgii L., 1753 |
| Aster oblongifolius Nutt., 1818 |
| Aster oolentangiensis Riddell, 1835 |
| Aster palmeri A. Gray, 1882 |
| Aster parviflorus (A. Gray) A. Gray, 1876 |
| Aster parvulus S.F. Blake, 1925 |
| Aster pauciflorus Nutt., 1818 |
| Aster pinnatifidus (Hook.) Kuntze, 1891 |