This name is a synonym of Sonchus oleraceus (L.) L..
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record 9B29B9E2-5162-409C-9D08-2062C589C6EA).
This name record (from TICA) was not included in version 1 of The Plant List. It is possible the same name was included from a different data source, to check this you can search for Sonchus oleraceus in version 1 of The Plant List.