Escobaria hesteri (Y. Wright) Buxb. Escobaria hesteri (Y. Wright) Buxb. in Oesterr. Bot. Z. 98: 78. 1951 sec. Hunt & al. 2006≡Coryphantha hesteri Y. Wright in Cact. Succ. J. (Los Angeles) 4: 274. 1932 syn. sec. Hunt & al. 2006