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 784E4D03-6387-4A78-B942-D4815462DBE4) with original publication details: Sp. Pl. 862 1753.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:317493-2.
This name was in version 1 of The Plant List, record gcc-126080.