This name is a synonym of Carex debilis var. rudgei L.H.Bailey.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 330787) with original publication details: Univ. Colorado Stud. Ser. Biol. 17: 16 1965.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:46057-2.
This name was in version 1 of The Plant List, record kew-330787, and has not been changed.