⚠ Version 1 of The Plant List has been superseded.

This name is in version 1.1 of The Plant List, record tro-5106978, with some changes.

Neoporteria islayensis f. spinosior (Backeb.) Donald & G.D. Rowley is a synonym of Eriosyce islayensis (C.F.Först.) Katt.

This name is a synonym of Eriosyce islayensis (C.F.Först.) Katt..

The record derives from Tropicos which reports it as a synonym (record 5106978) with original publication details: Cact. Succ. J. Gr. Brit. 28: 56 56 1966.

Full publication details for this name can be found in IPNI: urn:lsid:ipni.org:names:1086538-2.