⚠ Version 1 of The Plant List has been superseded.
This name is in version 1.1 of The Plant List, record kew-2781842, with some changes.
This name is a synonym of Frailea gracillima (Lem.) Britton & Rose.
The record derives from WCSP (in review) which reports it as a synonym with original publication details: Cact. Gen. Sp. Nov. 24 1839.
Full publication details for this name can be found in IPNI: urn:lsid:ipni.org:names:131837-1.