| Stylocline gnaphaloides Nutt., 1841 |
| Stylocline heringeri H. Rob., 1984 |
| Stylocline micropoides A. Gray, 1853 |
| Stylocline sonorensis Wiggins, 1950 |
| Symphyotrichinae Nesom, 1994 |
| Symphyotrichum Nees, 1832 |
| Symphyotrichum bimater (Standl. & Steyerm.) G.L. Nesom, 2018 |
| Symphyotrichum bullatum (Klatt) G.L. Nesom, 1994 |
| Symphyotrichum carnerosanum (S. Watson) G.L. Nesom, 1995 |
| Symphyotrichum chihuahuense G.L. Nesom, 2018 |
| Symphyotrichum divaricatum (Nutt.) G.L. Nesom, 1994 |
| Symphyotrichum drummondii (Lindl.) G.L. Nesom, 1994 |
| Symphyotrichum drummondii var. texanum (E.S. Burgess) G.L. Nesom, 1995 |
| Symphyotrichum ericoides (L.) G.L. Nesom, 1994 |
| Symphyotrichum expansum (Poepp. & Spreng.) G.L. Nesom, 1995 |
| Symphyotrichum falcatum (Lindl. ex DC.) G.L. Nesom, 1995 |
| Symphyotrichum falcatum var. commutatum (Torr. & A. Gray) G.L. Nesom, 1995 |
| Symphyotrichum foliaceum (Lindl. ex DC.) G.L. Nesom, 1995 |
| Symphyotrichum frondosum (Nutt.) G.L. Nesom, 1995 |
| Symphyotrichum gypsophilum (B.L. Turner) G.L. Nesom, 1995 |