Arnica discoidea var. eradiata (A.Gray) Cronquist accepted as Arnica discoidea Benth. (original description)
Haplopappus lanuginosus var. andersonii (Rydb.) Cronquist accepted as Stenotus lanuginosus var. andersonii (Rydb.) H.M.Hall (original description)
Haplopappus macronema var. canescens (A.Nelson) Cronquist (original description)
Hieracium scouleri var. nudicaule (A.Gray) Cronquist accepted as Hieracium nudicaule (A.Gray) A.Heller (original description)
Rudbeckia laciniata var. ampla (A.Nelson) Cronquist (original description)
Senecio eremophilus var. macdougalii Cronquist (original description)
Senecio integerrimus var. vaseyi Cronquist accepted as Senecio integerrimus var. exaltatus (Nutt.) Cronquist (original description)
Solidago gigantea var. serotina (Kuntze) Cronquist accepted as Solidago gigantea Aiton (original description)
Solidago spathulata var. neomexicana (A.Gray) Cronquist accepted as Solidago simplex var. simplex (original description)