In cultivation since the 1930s this is a very variable and widespread species in Bolivia and Argentina. It is also something of a “sink” name into which botanists inclined to “lumping” rather than “splitting” include several other plants regarded as separate species by Mosti & Papini (2011) and on this website. These include Aylostera albiareolata, A. buiningiana, A. deminuta, A. kupperiana, A. nitida, A. nogalensis, A. robustispina, A. spegazziniana and A. wahliana. Some also regard A. pseudodeminuta as a form of A. deminuta. There is a great deal of disagreement not helped by the fact that over the years many names have been erected by growers for slight variations in spination.

The stems are a bit longer than spherical, quite large for an Aylostera, bristled with fine white or brown-tipped spines, and the flowers are red, each petal with a faintly darker mid-stripe.

The description is here.

Plants of this species in the collection include:

Aylostera pseudodeminuta FR760

Aylostera pseudodeminuta J218

Aylostera pseudodeminuta VJ17