Regarded by some as a form of Aylostera fiebrigii, as are many others. Also known under the name Aylostera (or Rebutia) archibuiningiana.

Fairly densely spined, this light green clumping globular species is characterised by its orange flowers with white stigmas and pale yellow stamens. Spines are not very long and brown, or at least with brown tips.

The description is here.

Plants of this species in the collection include:

Aylostera spinosissima FR762b

Aylostera spinosissima JD235

Aylostera spinosissima KK861

Aylostera spinosissima L404

Aylostera spinosissima RH1041

Aylostera spinosissima aff. SE61a

Aylostera spinosissima WR89