Synonyms
Xanthisma spinulosum var. chihuahuanum (B.L.Turner & R.L.Hartm.) D.R.Morgan & R.L.Hartm.
Machaeranthera pinnatifida subsp. pinnatifida var. chihuahuana Unknown author
Machaeranthera pinnatifida var. chihuahuana B.L.Turner & R.L.Hartm.
Haplopappus spinulosus var. chihuahuanus (B.L.Turner & R.L.Hartm.) Gandhi