This name is a synonym of Sonchus leptocephalus Cass..
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record 8D45B982-ADA7-48B0-B4FC-CE5698F0D18B) with original publication details: 79 1786.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:192955-1.
This name was in version 1 of The Plant List, record gcc-123442.