This name is a synonym of Potamogeton berchtoldii subsp. gemmiparus (J.W.Robbins) Les & Tippery.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 292399) with original publication details: Manual ed. 5: 489 1867.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:307033-2.
This name was in version 1 of The Plant List, record kew-292399.