This name is a synonym of Carex breviculmis var. montivaga (S.T.Blake) Noot..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym and as an illegitimate name (record 225199) with original publication details: Bot. Jahrb. Syst. 69: 264 1938.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:298977-1.
This name was in version 1 of The Plant List, record kew-225199, and has not been changed.