This name is a synonym of Senecio nevadensis subsp. malacitanus (Huter) Greuter.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym and as an invalid name (record C775729A-FBB6-4271-835C-02D911426201) with original publication details: 3285 1831.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:181875-1.
This name was in version 1 of The Plant List, record gcc-1577.