This name is a synonym of Carex × olneyi Boott.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 225205) with original publication details: Rhodora 3: 52 1901.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:45904-2.
This name was in version 1 of The Plant List, record kew-225205, and has not been changed.