Lophophora diffusa (Croizat) Bravo in Cact. Suc. Mex. 12: 13. 1967 sec. Hunt 2016
- ≡Lophophora echinata var. diffusa Croizat in Desert Pl. Life 16: 44. 1944 syn. sec. Guzmán & al. 2003
- =Lophophora williamsii var. diffusa (Croizat) G.D. Rowley in Repert. Pl. Succ. 27: 7. 1979 syn. sec. Guzmán & al. 2003
- =Lophophora diffusa var. koehresii Ríha in Kaktusy (Brno) 32: 70-73. 1996 syn. sec. Guzmán & al. 2003
- =Lophophora williamsii var. koehresii (Ríha) Grym, Rod Lophophora: 55. 1997 syn. sec. Guzmán & al. 2003
- =Peyotl diffusus (Croizat) Sotom., Arred. & Mart. Mend. in Cactus & Co. 5: 227. 2001 syn. sec. Guzmán & al. 2003
- =Peyotl koehresii (Ríha) Sotom., Arred. & Mart. Mend. in Cactus & Co. 5: 219-228. 2001 syn. sec. Guzmán & al. 2003
- =Lophophora diffusa subsp. kubesae Halda, Kupcák & Malina in Acta Mus. Richnov., Sect. Nat., 9: 66. 2002 syn. sec. Halda & al. 2002
- =Lophophora diffusa subsp. swobodaiana Halda, Kupcák & Malina in Acta Mus. Richnov., Sect. Nat., 9: 67. 2002 syn. sec. Halda & al. 2002
- =Lophophora williamsii subsp. diffusa (Croizat) Scheinvar, Fl. Cactológ. Est. Querétaro: 212. 2004 syn. sec. Hunt & al. 2006