Euphorbia segoviensis (Klotzsch & Garcke) Boiss., DC., Prodr. 15(2): 58. 1862 sec. Steinmann 2025
- =Leptopus segoviensis Klotzsch & Garcke, Abh. Königl. Akad. Wiss. Berlin 1859. 1860 syn. sec. Martínez-Gordillo & al. 2006
- =Euphorbia chiapensis Brandegee, Univ. Calif. Publ. Bot. 6. 1914 syn. sec. Martínez-Gordillo & al. 2006
- =Eumecanthus chiapensis (Brandegee) Millsp., Publ. Field Mus. Nat. Hist. Bot. Ser. 2(11): 414. 1916 syn. sec. Martínez-Gordillo & al. 2006
- =Euphorbia sloanei L.C. Wheeler, Cactus and Succulent Journal 11. 1939 syn. sec. Martínez-Gordillo & al. 2006