This name is a synonym of Carex lenticularis var. impressa (L.H.Bailey) L.A.Standl..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 227617) with original publication details: Mem. Torrey Bot. Club 1: 18 1889.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:274073-2.
This name was in version 1 of The Plant List, record kew-227617, and has not been changed.