The Plant List — A working list for all plant species

⚠ Version 1 of The Plant List has been superseded.

This name is in version 1.1 of The Plant List, record kew-2781896, with some changes.

M Echinocactus horizontalis C.F.Först. 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 and as a spelling variant with original publication details: Handb. Cakteenk. 327 1846.