This name is a synonym of Carex digitalis var. floridana (L.H.Bailey) Naczi & Bryson.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 225992) with original publication details: Rhodora 43: 544 1941.
This name was in version 1 of The Plant List, record kew-225992, and has not been changed.