Askellia elegans (Hook.) W.A.Weber (original description)
Askellia nana (Richardson) W.A.Weber accepted as Askellia pygmaea (Ledeb.) Sennikov (original description)
Askellia nana subsp. ramosa (Babc.) W.A.Weber accepted as Askellia pygmaea (Ledeb.) Sennikov (original description)
Aspilia andersonii H.Rob. accepted as Aspilia fruticosa (Gardner) Baker (original description)
Aspilia jugata H.Rob. (original description)
Aspilia pastazensis H.Rob. accepted as Elaphandra pastazensis (H.Rob.) H.Rob. (original description)
Aster ciliolatus var. comatus (Fernald) A.G.Jones accepted as Symphyotrichum ciliolatum (Lindl.) Á.Löve & D.Löve (original description)
Aster ciliolatus var. maccallae (Rydb.) A.G.Jones accepted as Symphyotrichum subspicatum (Nees) G.L.Nesom (original description)
Aster ciliolatus var. wilsonii (Rydb.) A.G.Jones (original description)
Aster drummondii subsp. parviceps (Shinners) A.G.Jones (original description)
Aster fragilis var. subdumosus (Wiegand) A.G.Jones accepted as Symphyotrichum racemosum (Elliott) G.L.Nesom (new combination reference)
Aster lanceolatus subsp. interior (Wiegand) A.G.Jones accepted as Symphyotrichum lanceolatum var. interior (Wiegand) G.L.Nesom (original description)
Aster lanceolatus subsp. simplex (Willd.) A.G.Jones accepted as Symphyotrichum lanceolatum subsp. lanceolatum var. lanceolatum (Willd.) G.L.Nesom (original description)
Aster lateriflorus var. spatelliformis (E.S.Burgess) A.G.Jones accepted as Symphyotrichum lateriflorum var. spatelliforme G.L.Nesom (original description)
Aster novi-belgii subsp. johannensis (Fernald) A.G.Jones accepted as Symphyotrichum novi-belgii var. novi-belgii (L.) (original description)
Aster novi-belgii subsp. tardiflorus (L.) A.G.Jones accepted as Symphyotrichum tardiflorum (L.) Greuter, M.V.Agab. & Wagenitz (original description)
Aster pilosus subsp. parviceps (E.S.Burgess) A.G.Jones accepted as Symphyotrichum parviceps (E.S.Burgess) G.L.Nesom (original description)
Aster pilosus var. pusillus (A.Gray) A.G.Jones accepted as Symphyotrichum depauperatum (Fernald) G.L.Nesom (original description)
Aster praealtus var. coerulescens (DC.) A.G.Jones accepted as Symphyotrichum praealtum var. praealtum (Poir.) G.L.Nesom (original description)
Aster puniceus subsp. firmus (Nees) A.G.Jones (original description)
Aster puniceus var. scabricaulis (Shinners) A.G.Jones accepted as Symphyotrichum puniceum var. scabricaule (Shinners) G.L.Nesom (original description)
Brachyactis ciliata subsp. angusta (Lindl.) A.G.Jones (original description)
Brachyactis ciliata subsp. laurentiana (Fernald) A.G.Jones accepted as Symphyotrichum laurentianum (Fernald) G.L.Nesom (original description)
Chionolaena jeffreyi H.Rob. (original description)
Oligosporus pedatifidus (Nutt.) W.A.Weber (original description)
Seriphidium rothrockii (A.Gray) W.A.Weber accepted as Artemisia rothrockii A.Gray (original description)
Seriphidium tridentatum (Nutt.) W.A.Weber accepted as Artemisia tridentata subsp. tridentata Nutt. (original description)
Seriphidium tridentatum subsp. parishii (A.Gray) W.A.Weber accepted as Artemisia tridentata subsp. parishii (A.Gray) H.M.Hall & Clem. (original description)
Seriphidium tridentatum subsp. vaseyanum (Rydb.) W.A.Weber accepted as Artemisia tridentata subsp. vaseyana (Rydb.) Beetle (original description)
Seriphidium tridentatum subsp. wyomingense (Beetle & A.L.Young) W.A.Weber accepted as Artemisia tridentata subsp. wyomingensis Beetle & Young (original description)
Stenocline heringeri H.Rob. (original description)
Wedelia pertenuis H.Rob. (original description)