This name is a synonym of Cyanthillium cinereum (L.) H.Rob..
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record 9F1EACCA-030F-4548-B743-3E04293FCCE9) with original publication details: Prodr. (DC.) 7(1): 263 263 .
This name was in version 1 of The Plant List, record gcc-33445.