This name is a synonym of Conyza leucantha (D.Don) Ludlow & P.H.Raven.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record CFD9EA17-4EBD-44C8-9576-677833D93308) with original publication details: Prodr. 5 (1836) 436 1836.
This name was in version 1 of The Plant List, record gcc-77707.