⚠ Version 1 of The Plant List has been superseded.

This name is in version 1.1 of The Plant List, record kew-2781966, with some changes.

Echinocactus laticostatus Engelm. & J.M.Bigelow is a synonym of Echinocactus horizonthalonius Lem.

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: Pacif. Railr. Rep. Parke, Bot. 4: 32 1857.

Full publication details for this name can be found in IPNI: urn:lsid:ipni.org:names:131928-1.