My Hildewintera aureispina aka Rat tail cactus manages to produce some blooms here and there throughout the Summer.
The original growth on my plant is cristated and - if one wants to concentrate on this type of growth, it is recommended to cut off the straight/normal growth, which I never do since I also like the blooms. Central - and South American visitors always take a shine to this plant and ask for cuttings. No problem, the healed cut always produces a few pups.