Antennaria microcephala A.Gray accepted as Antennaria luzuloides subsp. aberrans (E.E.Nelson) R.J.Bayer & Stebbins (original description)
Chaenactis artemisiifolia (Harv. & A.Gray ex A.Gray) A.Gray (original description)
Chaenactis attenuata A.Gray accepted as Chaenactis carphoclinia A.Gray (original description)
Chaenactis heterocarpha var. tanacetifolia (A.Gray) A.Gray accepted as Chaenactis glabriuscula var. heterocarpha (Torr. & A.Gray ex A.Gray) H.M.Hall (original description)
Cnicus andersonii A.Gray accepted as Cirsium andersonii (A.Gray) Petr. (original description)
Cnicus andrewsii A.Gray accepted as Cirsium andrewsii (A.Gray) Jeps. (original description)
Cnicus arizonicus A.Gray accepted as Cirsium arizonicum var. arizonicum (A.Gray) Petr. (original description)
Cnicus breweri A.Gray accepted as Cirsium douglasii var. breweri (A.Gray) D.J.Keil & C.E.Turner (original description)
Cnicus californicus A.Gray accepted as Cirsium occidentale var. californicum (A.Gray) D.J.Keil & C.E.Turner (original description)
Cnicus carlinoides var. americanus A.Gray accepted as Cirsium scariosum var. americanum (A.Gray) D.J.Keil (original description)
Cnicus cernuus (Lag.) A.Gray accepted as Cirsium subcoriaceum (Less.) Sch.Bip. ex Sch.Bip. (original description)
Cnicus drummondii (Torr. & A.Gray) A.Gray accepted as Cirsium drummondii Torr. & A.Gray (original description)
Cnicus drummondii var. acaulescens A.Gray accepted as Cirsium drummondii Torr. & A.Gray (original description)
Cnicus edulis (Nutt.) A.Gray accepted as Cirsium edule Nutt. (original description)
Cnicus eriocephalus A.Gray accepted as Cirsium eatonii var. eriocephalum (A.Gray) D.J.Keil (original description)
Cnicus foliosus A.Gray accepted as Cirsium foliosum (Hook.) DC. (original description)
Cnicus heterolepis (Benth.) A.Gray accepted as Cirsium subcoriaceum (Less.) Sch.Bip. ex Sch.Bip. (original description)
Cnicus hookerianus A.Gray accepted as Cirsium hookerianum Nutt. (original description)
Cnicus lecontei (Torr. & A.Gray) A.Gray accepted as Cirsium lecontei Torr. & A.Gray (original description)
Cnicus neomexicanus (A.Gray) A.Gray accepted as Cirsium neomexicanum A.Gray (original description)
Cnicus nuttallii A.Gray accepted as Cirsium nuttallii DC. (original description)
Cnicus occidentalis (Nutt.) A.Gray accepted as Cirsium occidentale (Nutt.) Jeps. (original description)
Cnicus parryi A.Gray accepted as Cirsium parryi (A.Gray) Petr. (original description)
Cnicus quercetorum A.Gray accepted as Cirsium quercetorum (A.Gray) Jeps. (original description)
Cnicus remotifolius A.Gray accepted as Cirsium remotifolium (Hook.) DC. (original description)
Cnicus undulatus (Nutt.) A.Gray accepted as Cirsium undulatum (Nutt.) Spreng. (original description)
Cnicus undulatus var. canescens (Nutt.) A.Gray accepted as Cirsium canescens Nutt. (original description)
Cnicus undulatus var. grahamii (A.Gray) A.Gray accepted as Cirsium grahamii A.Gray (original description)
Cnicus undulatus var. megacephalus A.Gray accepted as Cirsium undulatum (Nutt.) Spreng. (original description)
Cnicus undulatus var. ochrocentrus (A.Gray) A.Gray accepted as Cirsium ochrocentrum subsp. ochrocentrum A.Gray (original description)
Cnicus wrightii (A.Gray) A.Gray accepted as Cirsium wrightii A.Gray (original description)
Gaillardia acaulis A.Gray accepted as Gaillardia parryi Greene (original description)
Senecio greenei A.Gray accepted as Packera greenei (A.Gray) W.A.Weber & Á.Löve (original description)
Thelesperma subnudum A.Gray (original description)