Symphyotrichum attenuatum (Lindl.) Semple accepted as Symphyotrichum laeve var. purpuratum (Nees) G.L.Nesom (original description)
Symphyotrichum chapmanii (Torr. & A.Gray) Semple & Brouillet (original description)
Symphyotrichum ericoides subsp. pansum (S.F.Blake) Semple accepted as Symphyotrichum ericoides (L.) G.L.Nesom (original description)
Symphyotrichum falcatum subsp. commutatum (Torr. & A.Gray) Semple accepted as Symphyotrichum falcatum var. commutatum (Torr. & A.Gray) G.L.Nesom (original description)
Symphyotrichum laeve subsp. concinnum (Willd.) Semple & Brouillet accepted as Symphyotrichum laeve var. concinnum (Willd.) G.L.Nesom (original description)
Symphyotrichum nahanniense (Cody) Semple (original description)
Symphyotrichum plumosum (Small) Semple (original description)
Symphyotrichum sect. Polyliguli (Semple & Brouillet) Semple (original description)
Symphyotrichum sect. Turbinelli (Rydb.) Semple (original description)
Symphyotrichum ser. Concinna (Nees) Semple (original description)
Symphyotrichum ser. Concinni (Nees) Semple (original description)
Symphyotrichum ser. Cordifolii (G.Don) Semple (original description)
Symphyotrichum ser. Foliacea (Rydb.) Semple (original description)
Symphyotrichum ser. Foliacei (Rydb.) Semple (original description)
Symphyotrichum ser. Punicea (House) Semple (original description)
Symphyotrichum ser. Punicei (House) Semple (original description)
Symphyotrichum subg. Ascendentes (Rydb.) Semple (original description)
Symphyotrichum subg. Astropolium (Nutt.) Semple (original description)
Symphyotrichum subg. Chapmaniani (Semple) Semple (original description)
Symphyotrichum subsect. Heterophylli (Nees) Semple (original description)
Symphyotrichum texanum (E.S.Burgess) Semple accepted as Symphyotrichum drummondii var. texanum (E.S.Burgess) G.L.Nesom (original description)