This name is a synonym of Cyanus atratus (Willd.) Holub.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record 7B243614-D7C9-4DAC-B3D4-C29F7725BA52) with original publication details: 2290 1803.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:189945-1.
This name was in version 1 of The Plant List, record gcc-118297.