Aylostera deminuta

Like other members of the clade to which it belongs, Aylostera deminuta usually has fibrous rather than tuberous roots. Its flower parts are fused together, at least at the base. The scales on the pericarpels and receptacles are of the same colour as the receptacles, rather than being darker or having dark tips. The species has been described separately under a number of synonyms, including Rebutia deminuta, Rebutia pseudodeminuta and Rebutia simoniana. As R. deminuta, it is described as forming clumps, with individual ribbed stems about 2.5 cm across, and having deep orange-red flowers about 3 cm long and wide. Other forms are described as solitary, with larger stems (up to about 10 cm high) and somewhat larger flowers, which are orange or carmine red.

A. deminuta is native to Bolivia and north-western Argentina. It occurs with related Aylostera species on the eastern side of the Andes, in montane dry forests, shrublands and dry puna grasslands.