This name is a synonym of Carex communis var. amplisquama (F.J.Herm.) Rettig.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 224459) with original publication details: Rhodora 57: 158 1955.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:45716-2.
This name was in version 1 of The Plant List, record kew-224459, and has not been changed.