Sideranthus spinulosus (Pursh) Sweet ex Rydberg nom. illeg.

Sideranthus spinulosus (Pursh) Sweet ex Rydberg nom. illeg. 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.