This name is a synonym of Noticastrum argenteum Cabrera.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record 64D7398E-7B7B-475D-933C-A23747AC9BE2) with original publication details: 188 1857.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:23743-2.
This name was in version 1 of The Plant List, record gcc-60902, and has not been changed.