Synonyms
Haplopappus spinulosus subsp. scabrellus (Greene) H.M.Hall
Eriocarpum scabrellum Greene
Xanthisma spinulosum var. scabrellum (Greene) D.R.Morgan & R.L.Hartm.
Machaeranthera pinnatifida var. scabrella (Greene) B.L.Turner & R.L.Hartm.
Machaeranthera scabrella (Greene) Shinners
Haplopappus spinulosus var. scabrellus (Greene) S.F.Blake
Xanthisma scabrellum (Greene) G.L.Nesom & B.L.Turner