Euphorbia calcarata (Schltdl.) V.W. Steinm. in Acta Bot. Mex. 65: 48. 2003 sec. Martínez-Gordillo & al. 2002
- =Pedilanthus calcaratus Schltdl., Linnaea 19. 1847 syn. sec. Martínez-Gordillo & al. 2006
- =Pedilanthus ghiesbreghtianus Baill. in Adansonia 1: 340. 1861 syn. sec. Martínez-Gordillo & al. 2006
- =Pedilanthus macradenius Donn. Sm. in Bot. Gaz. 19(7): 263. 1894 syn. sec. Martínez-Gordillo & al. 2006
- =Pedilanthus purpusii Brandegee in Univ. Calif. Publ. Bot. 4(19): 377. 1913 syn. sec. Martínez-Gordillo & al. 2006
- =Tithymalus calcaratus (Schltdl.) Croizat in Amer. J. Bot. 24 (10): 704. 1937 syn. sec. Martínez-Gordillo & al. 2006
- =Tithymalus macradenius (Donn. Sm.) Croizat in Amer. J. Bot. 24 (10): 704. 1937 syn. sec. Martínez-Gordillo & al. 2006
- =Tithymalus purpusii (Brandegee) Croizat in Amer. J. Bot. 24 (10): 704. 1937 syn. sec. Martínez-Gordillo & al. 2006