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 and as an illegitimate name (record 242754) with original publication details: J. Ecol. 37: 194 1949.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:77069204-1.
This name was in version 1 of The Plant List, record kew-242754.