Polaskia chichipe I think. Those purple spines! : r/cactus
Order Tree-like Polaskia Chichipe Cactus | Planet Desert
British Cactus and Succulent Society on Twitter: "Polaskia chichipe. Photo by Alex Furgiuele on Unsplash #bcss #cactus https://t.co/sMUSC7texB" / Twitter
Stem of a tubular type Chichibe cactus (Polaskia chichipe) Stock Photo | Adobe Stock