Machaeranthera pinnatifida (Hooker) Shinners var. pinnatifida

Machaeranthera pinnatifida (Hooker) Shinners var. pinnatifida is a synonym sensu TROPICOS of:

Xanthisma spinulosum (Pursh) D.R. Morgan & R.L. Hartman var. spinulosum, an accepted variety name sensu FNA Ed. Comm., 2006b.