Haplopappus ferrisiae S.F.Blake accepted as Hazardia ferrisiae (S.F.Blake) W.D.Clark (original description)
Haplopappus lehmannii var. subcalvus S.F.Blake (original description)
Haplopappus martirensis (Wiggins) S.F.Blake accepted as Ericameria martirensis Wiggins (original description)
Haplopappus salicinus S.F.Blake accepted as Lorandersonia salicina (S.F.Blake) Urbatsch, R.P.Roberts & Neubig (original description)
Haplopappus scopulorum var. hirtellus S.F.Blake accepted as Chrysothamnus scopulorum (M.E.Jones) Urbatsch, R.P.Roberts & Neubig (original description)
Haplopappus wigginsii S.F.Blake accepted as Machaeranthera wigginsii (S.F.Blake) R.L.Hartm. (original description)
Sonchus diffusa Tidestr. (original description)