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 292422) with original publication details: Bot. Gaz. 5: 51 1880.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:208931-2.
This name was in version 1 of The Plant List, record kew-292422.