Euphorbia colletioides Benth., Bot. Voy. Sulph. 1846 sec. Martínez-Gordillo & al. 2002
- =Euphorbia recta Klotzsch, Bot. Voy. Herald: 277. 1856 syn. sec. Martínez-Gordillo & al. 2006
- =Euphorbia ligustrina Boiss., Cent. Euphorb.: 21. 1860 syn. sec. Martínez-Gordillo & al. 2006
- =Euphorbia peganoides Boiss., Cent. Euphorb. 1860 syn. sec. Martínez-Gordillo & al. 2006
- =Euphorbia plicata S. Watson in Proc. Amer. Acad. Arts 21: 438. 1886 syn. sec. Martínez-Gordillo & al. 2006
- =Euphorbia junciformis Sessé & Moc., Fl. Mexic., ed. 2: 122. 1894 syn. sec. Martínez-Gordillo & al. 2006
- =Euphorbia padifolia Brandegee in Univ. Calif. Publ. Bot. 6: 54. 1914 syn. sec. Martínez-Gordillo & al. 2006
- =Aklema colletioides (Benth.) Millsp., Publ. Field Mus. Nat. Hist. Bot. ser. 2(11). 416. 1916 syn. sec. Martínez-Gordillo & al. 2006
- =Aklema ligustrina (Boiss.) Millsp. in Publ. Field Mus. Nat. Hist. Bot. ser. 2(11): 416. 1916 syn. sec. Martínez-Gordillo & al. 2006
- =Aklema peganoides (Boiss.) Millsp., Publ. Field Mus. Nat. Hist. Bot. Ser. 2(11). 1916 syn. sec. Martínez-Gordillo & al. 2006
- =Aklema plicata (S. Watson) Millsp. in Publ. Field Mus. Nat. Hist. Bot. ser. 2(11): 417. 1916 syn. sec. Martínez-Gordillo & al. 2006