This name is a synonym of Potamogeton berchtoldii Fieber.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 292419) with original publication details: Deutschl. Fl. ed. 3, 1: 857 1823.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:208937-2.
This name was in version 1 of The Plant List, record kew-292419.