Lobivia formosa kieslingii

IDing this plant was a challenge for me, and even after it finally reached the flowering size I could not quite get it.This is a form of well-known Soechrensia, but it flowers not from the apex as you would expect, but from the base like other 'regular' Lobivias. Flower size and shape is identical to other Soechrensias.

Soecherncia is the original generic name for those plants, now lumped to  Lobivia or even larger genus Echinopsis. This is high-altitude plants, getting fairly large in time.