This name is a synonym of Senecio biserratus Belcher.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record 443FC9E9-797B-4C86-9418-CC0FE2D175EF) with original publication details: 296 1838.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:203362-1.
This name was in version 1 of The Plant List, record gcc-122454, and has not been changed.