This name is a synonym of Juncus balticus subsp. andicola (Hook.) Snogerup.
The record derives from IOPI
(data supplied on 2012-03-23)
which reports it as a synonym (record 314387) with original publication details: Publ. Field Mus. Nat. Hist., Bot. Ser. 11(1): 44 1931.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:131980-2.
This name was in version 1 of The Plant List, record kew-314387.