Subspecies, varieties, forms and cultivars of plants belonging to the Lophophora diffusa group

• Lophophora diffusa (Croizat) Bravo: Globular spineless cactus with large tap root. Solitary or forming variable stemmed clumps. Stem yellow-green or grey-green, usually lacking well-defined ribs and furrows.
• Lophophora diffusa var. koehresii Říha: This is probably the smallest Lophophora. It has big pale pink flowers with darker midstrip. Stem characteristically dark green coloured and the ribs are more strongly in relief.
• Lophophora diffusa subs. kubesae Halda, Kupčák & Malina: The particularity of this subspecies will be revealed only in older specimens that are larger in size and tend to form large multi-headed heaps, up to 1,5 mt in diameter.
• Lophophora diffusa var. swobodaiana Halda, Kupčák & Malina: Body silver green, ribs strongly in relief with hemispherical tubercles. Blooms cream to light yellow.
• Lophophora diffusa subs. viridescens Halda: Same as Lophophora diffusa var. koeheresii ?
• Lophophora lutea (Rouhier) Backeb.: same as Lophophora diffusa. Distribution: Querétaro, México.