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 DE0C7523-012F-4AF1-9F07-6D1A9E64D964) with original publication details: 16 1995.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:983904-1.
This name was in version 1 of The Plant List, record gcc-54326.