This name is a synonym of Carex leavenworthii Dewey.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 225418) with original publication details: Pflanzenr. IV, 20(38): 158 1909.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:45956-2.
This name was in version 1 of The Plant List, record kew-225418, and has not been changed.