Thaspium barbinode var. pinnatifidum J.M. Coulter & Rose

Thaspium barbinode var. pinnatifidum J.M. Coulter & Rose is a synonym sensu FNA Ed. Comm., 2024 of:

Thaspium chapmanii (J.M. Coulter & Rose) Small, an accepted species name sensu FNA Ed. Comm., 2024.