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 C784DCCE-DCF8-4062-8D81-35F39BBCFBC9) with original publication details: Icon. Pl. Rar. 3 1789.
This name was in version 1 of The Plant List, record gcc-29188.