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 5C01B800-BF1A-4EF2-9E05-4590B68947FE) with original publication details: Linnaea 14 1840.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:161944-3.
This name was in version 1 of The Plant List, record gcc-37534.