Lophophora williamsii var. diffusa (Croizat) G.D.Rowley in Repert. Pl. Succ. 27: 7. 1979 ["1976"]
Lophophora williamsii var. diffusa in Repert. Pl. Succ. 27: 7. 1979 ["1976"]
is new combination for Lophophora echinata var. diffusa in Desert Pl. Life 16: 44. 1944