Euphorbia tithymaloides L. subsp. tithymaloides, Sp. Pl.: 453. 1753 sec. Martínez-Gordillo & al. 2002
- =Euphorbia tithymaloides var. myrtifolia L., Sp. Pl.: 453. 1753 syn. sec. Martínez-Gordillo & al. 2006
- =Tithymalus myrtifolius Mill., Gard. Dict. (ed. 8). 1768 syn. sec. Martínez-Gordillo & al. 2006
- =Euphorbia myrtifolia (Mill.) Lam., Encyclopedie Methodique. Botanique. 2: 18. 1786 syn. sec. Martínez-Gordillo & al. 2006
- =Crepidaria myrtifolia (Mill.) Haw., Syn. Pl. Succ.: 136. 1812 syn. sec. Martínez-Gordillo & al. 2006
- =Pedilanthus tithymaloides (L.) Poit. in Ann. Mus. Natl. Hist. Nat. 19: 390. 1812 syn. sec. Martínez-Gordillo & al. 2006
- =Pedilanthus myrtifolius (Mill.) Link, Enumeratio Plantarum Horti Regii Berolinensis Altera 2: 18. 1822 syn. sec. Martínez-Gordillo & al. 2006
- =Euphorbia canaliculatus (Lodd.) Sweet, Hortus Britannicus, Sweet's. Primera Edition. 1827 syn. sec. Martínez-Gordillo & al. 2006
- =Pedilanthus houlletii Baill. in Adansonia 1: 431. 1861 syn. sec. Martínez-Gordillo & al. 2006
- =Pedilanthus fendleri Boiss., Prodr. (DC.). 15(2): 5. 1862 syn. sec. Martínez-Gordillo & al. 2006
- =Tithymaloides fendleri (Boiss.) Kuntze, Revis. Gen. Pl. 2: 620. 1891 syn. sec. Martínez-Gordillo & al. 2006
- =Tithymaloides houlletii (Baill.) Kuntze, Revis. Gen. Pl. 2: 620. 1891 syn. sec. Martínez-Gordillo & al. 2006
- =Tithymaloides myrtifolium (L.) Kuntze, Revis. Gen. Pl. 2: 620. 1891 syn. sec. Martínez-Gordillo & al. 2006
- =Pedilanthus pringlei B.L. Rob. in Proc. Amer. Acad. Arts 29: 322. 1894 syn. sec. Martínez-Gordillo & al. 2006
- =Pedilanthus gritensis Zahlbr. in Annalen des K. K. Naturhistorischen Hofmuseums. 12: 104. 1897 syn. sec. Martínez-Gordillo & al. 2006
- =Pedilanthus deamii Millsp. in Publ. Field Mus. Nat. Hist. Bot. ser. 2(9): 356. 1913 syn. sec. Martínez-Gordillo & al. 2006
- =Pedilanthus campester Brandegee in Univ. Calif. Publ. Bot. 6: 56. 1914 syn. sec. Martínez-Gordillo & al. 2006
- =Pedilanthus petraeus Brandegee in Univ. Calif. Publ. Bot. 10: 411. 1924 syn. sec. Martínez-Gordillo & al. 2006
- =Pedilanthus ierensis Britton in Bull. Torrey Bot. Club 53(7): 468. 1926 syn. sec. Martínez-Gordillo & al. 2006
- =Tithymalus deamii (Millsp.) Croizat in Amer. J. Bot. 24 (10): 704. 1937 syn. sec. Martínez-Gordillo & al. 2006
- =Tithymalus fendleri (Boiss.) Croizat in Amer. J. Bot. 24 (10): 704. 1937 syn. sec. Martínez-Gordillo & al. 2006
- =Tithymalus ierensis (Britton) Croizat in Amer. J. Bot. 24 (10): 704. 1937 syn. sec. Martínez-Gordillo & al. 2006
- =Tithymalus petraeus (Brandegee) Croizat in Amer. J. Bot. 24 (10): 704. 1937 syn. sec. Martínez-Gordillo & al. 2006
- =Tithymalus pringlei (B.L. Rob.) Croizat in Amer. J. Bot. 24 (10): 704. 1937 syn. sec. Martínez-Gordillo & al. 2006
- =Tithymalus tithymaloides (L.) Croizat in Amer. J. Bot. 24 (10): 704. 1937 syn. sec. Martínez-Gordillo & al. 2006
- =Tithymalus villicus Croizat in Amer. J. Bot. 24 (10): 704. 1937 syn. sec. Martínez-Gordillo & al. 2006
- =Pedilanthus camporum Standl. & Steyerm. in Publ. Field Mus. Nat. Hist. Bot. ser. 23(3): 124. 1944 syn. sec. Martínez-Gordillo & al. 2006