Euphorbia wrightii Torr. & A. Gray, Report on the Botany of the Expedition 2: 174. 1856 sec. Martínez-Gordillo & al. 2002
- =Alectoroctonum wrightii (Torr. & A. Gray) Klotzsch & Garcke in Abh. Königl. Akad. Wiss. Berlin 1859: 39. 1860 syn. sec. Martínez-Gordillo & al. 2006
- =Tithymalopsis wrightii (Torr. & A. Gray) Small, Fl. S.E. U.S., ed. 2: 1349, 1375. 1913 syn. sec. Martínez-Gordillo & al. 2006
- =Tithymalus wrightii (Torr. & A. Gray) Millsp. ex A. Heller, Cat. N. Amer. Pl. (ed. 3): 231. 1914 syn. sec. Martínez-Gordillo & al. 2006