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 03ADCC09-95F7-45EF-955D-8CD1177913EA) with original publication details: Blumea 7 290 1952.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:205044-1.
This name was in version 1 of The Plant List, record gcc-94366, and has not been changed.