This name is a synonym of Cyanus fuscomarginatus (K.Koch) Greuter.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record 5F6566B3-924A-4E3B-9D38-E88F18B948CC) with original publication details: 41 1951.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:190540-1.
This name was in version 1 of The Plant List, record gcc-134799.