⚠ Version 1 of The Plant List has been superseded.

This name is in version 1.1 of The Plant List, record tro-50335488, with some changes.

Echinofossulocactus arrigens f. xiphacanthus (Miq.) Krainz is a synonym of Stenocactus arrigens (Link) A. Berger ex A.W. Hill

This name is a synonym of Stenocactus arrigens (Link) A. Berger ex A.W. Hill.

The record derives from Tropicos which reports it as a synonym (record 50335488) with original publication details: 1967.