⚠ Version 1 of The Plant List has been superseded.
This name is in version 1.1 of The Plant List, record kew-2781905, with some changes.
This name is a synonym of Echinocactus horizonthalonius Lem..
The record derives from WCSP (in review) which reports it as a synonym with original publication details: Monatschr. Kakteenk. 21: 181 1911.
Full publication details for this name can be found in IPNI: urn:lsid:ipni.org:names:87442-2.