Tithymalus commutatus (Engelmann ex A. Gray) Klotzsch & Garcke

Tithymalus commutatus (Engelmann ex A. Gray) Klotzsch & Garcke is a synonym sensu FNA Ed. Comm., 2016 of:

Euphorbia commutata Engelmann, an accepted species name sensu FNA Ed. Comm., 2016.