This name is a synonym of Zannichellia palustris subsp. pedicellata (Wahlenb. & Rosén) Hook.f..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 291824) with original publication details: Deutschl. Fl. ed. 2, 4: 92 1905.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:699870-1.
This name was in version 1 of The Plant List, record kew-291824.