This name is a synonym of Eleocharis mamillata subsp. austriaca (Hayek) Strandh..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 242325) with original publication details: Sched. Fl. Stiriac. 19-20: 8 1910.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:308696-1.
This name was in version 1 of The Plant List, record kew-242325, and has not been changed.