Very rare succulent, it has stems with four corners that reach even 15 cm in height, maintaining a diameter of 2-3 cm. It tends to branch easily, generating a sort of small shrub, thick and compact, adorned by sparse whitish areoles. From these ones come out a pair of short thorns, robust and of reddish-brown colour. The cup-shaped structures in which its microscopic and graceful flowers of a very lively yellow are arranged are undoubtedly particular.