⚠ Version 1 of The Plant List has been superseded.

This name is in version 1.1 of The Plant List, record kew-2781953, and has not been changed.

Echinocactus knippelianus Quehl is a synonym of Frailea knippeliana (Quehl) Britton & Rose

The record derives from WCSP (in review) which reports it as a synonym with original publication details: Monatschr. Kakteenk. 12: 9 1902.

Full publication details for this name can be found in IPNI: urn:lsid:ipni.org:names:87473-2.