Euphorbia xalapensis Kunth, Nov. Gen. Sp. Pl. 2: 61. 1817 sec. Martínez-Gordillo & al. 2002
- =Euphorbia saccharata Boiss., Cent. Euphorb.: 18. 1860 syn. sec. ???
- =Euphorbia xalapensis var. valida Hochr. in Bull. New York Bot. Gard. 6: 278. 1910 syn. sec. Martínez-Gordillo & al. 2006
- =Euphorbia enalla Brandegee in Univ. Calif. Publ. Bot. 6: 54. 1914 syn. sec. Martínez-Gordillo & al. 2006
- =Eumecanthus xalapensis (Kunth) Millsp., Publ. Field Mus. Nat. Hist. Bot. ser. 2(11). 413. 1916 syn. sec. Martínez-Gordillo & al. 2006
- =Euphorbia amphimalaca Standl. in Publ. Field Mus. Nat. Hist. Bot. ser. 4(8): 313. 1929 syn. sec. Martínez-Gordillo & al. 2006