⚠ Version 1 of The Plant List has been superseded.
This name record (from Tropicos) is not included in version 1.1 of The Plant List. It is possible the same name is included from a different data source, to check this you can search for Echinocactus microspermus in version 1.1 of The Plant List.
This name is a synonym of Parodia microsperma subsp. horrida .
The record derives from Tropicos which reports it as a synonym (record 5104914
) with original publication details: Anales Mus. Nac. Buenos Aires 4: 498 498 1905.
Full publication details for this name can be found in IPNI: urn:lsid:ipni.org:names:87534-2
.