This name is a synonym of Carex saximontana Mack..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 224842) with original publication details: Vasc. Pl. Wyoming 296 1988.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:274046-2.
This name was in version 1 of The Plant List, record kew-224842, and has not been changed.