Cirsium campylon H.Sharsm. accepted as Cirsium fontinale var. campylon (H.Sharsm.) Pilz ex D.J.Keil & C.E.Turner (original description)
Cirsium peckii L.F.Hend. accepted as Cirsium eatonii var. peckii (L.F.Hend.) D.J.Keil (original description)
Cirsium wallowense M.Peck (original description)
Haplopappus eximius subsp. peirsonii D.D.Keck accepted as Lorandersonia peirsonii (D.D.Keck) Urbatsch, R.P.Roberts & Neubig accepted as Toiyabea peirsonii (D.D. Keck) Nesom (original description)
Haplopappus eximius subsp. typicus D.D.Keck (original description)
Haplopappus racemosus subsp. lucidus D.D.Keck accepted as Pyrrocoma lucida (D.D.Keck) Kartesz & Gandhi (original description)
Haplopappus racemosus subsp. pinetorum D.D.Keck accepted as Pyrrocoma racemosa var. pinetorum (D.D.Keck) Kartesz & Gandhi (original description)
Lactuca tatarica subsp. pulchella (Pursh) Stebbins accepted as Lactuca tatarica (L.) C.A.Mey. (original description)
Madia gracilis (Sm.) D.D.Keck & J.C.Clausen ex Applegate (new combination reference)
Monolopia stricta Crum (original description)
Taraxacum paucisquamosum Peck (original description)
Taraxacum paucisquamosum M.Peck accepted as Taraxacum officinale subsp. ceratophorum (Ledeb.) Schinz ex Thell. (original description)