Aster americanus Onno accepted as Aster alpinus subsp. vierhapperi Onno (original description)
Aster gooddingii Onno accepted as Xylorhiza tortifolia var. tortifolia (Torr. & A.Gray) Greene (original description)
Aster handelii Onno (original description)
Aster mekongensis Onno accepted as Aster himalaicus C.B.Clarke (original description)
Aster muirii (A.Gray) Onno accepted as Erigeron muirii A.Gray (original description)
Aster oreaster (Onno) Farrer ex Onno accepted as Aster brachytrichus Franch. (original description)
Aster roylei Onno accepted as Erigeron multiradiatus (Lindl. ex DC.) Benth. & Hook.f. (original description)
Aster salwinensis Onno (original description)
Aster ser. Macrochaeti Onno (original description)
Aster subsect. Homochaeta Onno (original description)