Thelocactus hexaedrophorus subs. lloydii is one of the old controversial geographical or morphological forms of the variable Thelocactus hexaedrophorus that distinguishes from the standard species for the delta-shaped tubercles, the more numerous (up to 3) reddish central spines, more numerous (6-8) reddish white to brownish radials, and smaller flowers 3,3-3,6 cm in diameter. However it look very similar to other varieties of Thelocactus hexaedrophorus which are linked one to each others by populations of plants with intermediate characteristics. Due to the species variability it seems not justified to recognise this subspecies. Nowadays all this forms are thought to belong to a unique polymorphic species.