Aster crenifolius (Fernald) Cronquist accepted as Symphyotrichum novi-belgii var. crenifolium (Fernald) Labrecque & Brouillet (original description)
Aster crenifolius var. crenifolius Cronquist accepted as Aster crenifolius (Fernald) Cronquist accepted as Symphyotrichum novi-belgii var. crenifolium (Fernald) Labrecque & Brouillet (original description)
Aster falcatus var. falcatus Cronquist accepted as Aster falcatus D.C.Eaton accepted as Symphyotrichum ascendens (Lindl.) G.L.Nesom (original description)
Aster laevis var. laevis Cronquist accepted as Aster laevis L. accepted as Symphyotrichum laeve (L.) Á.Löve & D.Löve (original description)
Aster paludosus subsp. paludosus (Alexander) Cronquist accepted as Aster paludosus Sol. ex Aiton accepted as Eurybia paludosa (Sol. ex Aiton) G.L.Nesom (original description)
Aster paternus Cronquist accepted as Sericocarpus asteroides (L.) Britton, Sterns & Poggenb. (original description)
Aster pubentior Cronquist accepted as Doellingeria umbellata (Mill.) Nees (original description)
Aster puniceus var. puniceus Cronquist accepted as Aster puniceus L. accepted as Symphyotrichum puniceum (L.) Á.Löve & D.Löve (original description)
Aster simplex var. interior (Wiegand) Cronquist (original description)
Aster simplex var. interior (Wiegand) Cronquist (original description)
Aster simplex var. ramosissimus (Torr. & A.Gray) Cronquist accepted as Symphyotrichum lanceolatum subsp. lanceolatum var. lanceolatum (Willd.) G.L.Nesom (original description)
Aster simplex var. simplex Cronquist accepted as Aster simplex C.C.Chang accepted as Miyamayomena simplex (Hand.-Mazz.) Y.L.Chen (original description)
Boltonia asteroides var. asteroides (L.) Cronquist (original description)
Boltonia asteroides var. latisquama (A.Gray) Cronquist (original description)
Boltonia asteroides var. recognita (Fernald & Griscom) Cronquist (original description)
Chrysopsis graminifolia var. graminifolia Cronquist accepted as Chrysopsis graminifolia (Michx.) Elliott accepted as Pityopsis graminifolia (Michx.) Nutt. (original description)
Chrysopsis villosa var. angustifolia (Rydb.) Cronquist accepted as Heterotheca stenophylla var. angustifolia (Rydb.) Semple (original description)
Chrysopsis villosa var. camporum (Greene) Cronquist accepted as Heterotheca camporum (Greene) Shinners (original description)
Chrysopsis villosa var. villosa Cronquist accepted as Chrysopsis villosa (Pursh) Nutt. ex DC. (original description)
Conyza canadensis var. glabrata (A.Gray) Cronquist accepted as Erigeron canadensis L. (original description)
Conyza canadensis var. pusilla (Nutt.) Cronquist accepted as Erigeron canadensis L. (original description)
Grindelia squarrosa var. squarrosa Cronquist accepted as Grindelia squarrosa (Pursh) Dunal (original description)