Lophophora williamsii subsp. diffusa (Croizat) Scheinvar, Fl. Cactológ. Est. Querétaro: 212. 2004
Lophophora williamsii subsp. diffusa, Fl. Cactológ. Est. Querétaro: 212. 2004
is new combination for Lophophora echinata var. diffusa in Desert Pl. Life 16: 44. 1944