This name is a synonym of Potamogeton octandrus Poir..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 308743) with original publication details: Fragm. 1: 90 1858.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:603437-1.
This name was in version 1 of The Plant List, record kew-308743.