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 8FEBAF1E-BC3F-4898-BA8B-60D2029B101D) with original publication details: Linnaea 24 426 1851.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:70029103-1.
This name was in version 1 of The Plant List, record gcc-52209.