This name is a synonym of Libanothamnus occultus (S.F.Blake) Cuatrec..
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record D4D82D61-C6E1-4794-897D-170C67D7A041) with original publication details: Notul. Syst. (Paris) 15 233 1956.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:97695-2.
This name was in version 1 of The Plant List, record gcc-12359.