This name is a synonym of Cyanus segetum Hill.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record 3B804BFF-986A-4806-B803-518B49D0E93B) with original publication details: Werdenda 1 43 1927.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:51285-2.
This name was in version 1 of The Plant List, record gcc-44018.