This name is a synonym of Eleocharis palustris subsp. waltersii Bureš & Danihelka.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 370953) with original publication details: Prodr. Fl. Böhmen 1: 77 1867.
This name was in version 1 of The Plant List, record kew-370953.