Thaspium barbinode var. chapmanii J.M. Coulter & Rose, nom. illeg.
Thaspium barbinode var. chapmanii J.M. Coulter & Rose, nom. illeg. is a synonym sensu FNA Ed. Comm., in prep. f of:
Thaspium chapmanii (J.M. Coulter & Rose) Small, an accepted species name sensu FNA Ed. Comm., in prep. f.