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 315499) with original publication details: Fl. Pis. 1: 364 1798.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:443245-1.
This name was in version 1 of The Plant List, record kew-315499.