This name is a synonym of Conyza maxima Zoll. & Mor..
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record 78C1E0A5-B520-4CFF-8259-232290E4F08F) with original publication details: Fl. Ned. Ind. 2 58 1856.
This name was in version 1 of The Plant List, record gcc-19028, and has not been changed.