This name is a synonym of Luzula spicata subsp. conglomerata (W.D.J.Koch) Murr.
The record derives from IOPI
(data supplied on 2012-03-23)
which reports it as a synonym (record 316721) with original publication details: Bot. Not. 115: 302 1962.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:77113873-1.
This name was in version 1 of The Plant List, record kew-316721.