Lophophora williamsii
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Noun | 1. | Lophophora williamsii - a small spineless globe-shaped cactus; source of mescal buttons cactus - any succulent plant of the family Cactaceae native chiefly to arid regions of the New World and usually having spines genus Lophophora, Lophophora - two species of small cacti of northeastern Mexico and southwestern United States having rounded stems covered with jointed tubercles: mescal magic mushroom, mescal button, sacred mushroom - the button-shaped top of the mescal cactus; a source of psilocybin |
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