Achillea borealis var. arenicola (A.Heller) J.T.Howell accepted as Achillea millefolium L. (original description)
Achillea borealis var. californica (Pollard) J.T.Howell accepted as Achillea millefolium L. (original description)
Aster alpigenus subsp. haydenii (Porter) Cronquist accepted as Oreostemma alpigenum var. haydenii (Porter) G.L.Nesom (original description)
Aster elatus (Greene) Cronquist accepted as Oreostemma elatum (Greene) Greene (original description)
Aster peirsonii Sharsm. accepted as Oreostemma peirsonii (Sharsm.) G.L.Nesom (original description)
Baeria macrantha var. thalassophila J.T.Howell accepted as Lasthenia californica subsp. macrantha (A.Gray) R.Chan (original description)
Blennosperma angustifolia (Kunth) W.R.Anderson (original description)
Blennosperma nanum var. robustum J.T.Howell (original description)
Microseris paludosa (Greene) J.T.Howell (original description)
Parthenium ligulatum (M.E.Jones) Barneby (original description)
Parthenium tetraneuris Barneby accepted as Parthenium alpinum (Nutt.) Torr. & A.Gray (original description)
Senecio pattersonensis Hoover (original description)
Stylocline amphibola (A.Gray) J.T.Howell accepted as Micropus amphibolus A.Gray (original description)