This name is a synonym of Juncus hybridus Brot..
The record derives from IOPI
(data supplied on 2012-03-23)
which reports it as a synonym and as an illegitimate name (record 314987) with original publication details: Fl. Ital. 4: 190 1839.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:442950-1.
This name was in version 1 of The Plant List, record kew-314987.