Carduus maritima Elmer accepted as Cirsium rhothophilum S.F.Blake (original description)
Carduus maritimus Elmer (original description)
Chrysopsis californica Elmer accepted as Heterotheca sessiliflora subsp. echioides (Benth.) Semple (original description)
Chrysothamnus corymbosus Elmer (original description)
Deinandra simplex Elmer accepted as Deinandra fasciculata (DC.) Greene (original description)
Encelia actoni Elmer (original description)
Machaeranthera pinosa Elmer accepted as Dieteria canescens var. canescens (Pursh) Nutt. (original description)
Malacothrix succulenta Elmer accepted as Malacothrix incana (Nutt.) Torr. & A.Gray (original description)