Lophophora echinata var. diffusa Croizat in Desert Pl. Life 16: 44. 1944
Lophophora echinata var. diffusa in Desert Pl. Life 16: 44. 1944
is basionym for Lophophora diffusa in Cact. Suc. Mex. 12: 13. 1967
is basionym for Lophophora williamsii subsp. diffusa, Fl. Cactológ. Est. Querétaro: 212. 2004
is basionym for Lophophora williamsii var. diffusa in Repert. Pl. Succ. 27: 7. 1979 ["1976"]
is basionym for Lophophora diffusa subsp. diffusa