Castilla elastica Cerv., Supl. Gaz. Lit. Mexico: 7. 1794 sec. Villaseñor & al. 2010
- =Castilla lactiflua O.F. Cook in Science 18(457): 438. 1903 syn. sec. Villaseñor & al. 2010
- =Castilla guatemalensis Pittier in Contr. U. S. Natl. Herb. 13: 272. 1910 syn. sec. Villaseñor & al. 2010