This name is a synonym of Ruppia maritima L..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 26300536) with original publication details: Summa Veg. Scand. 68 1846.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:603485-1.
This name was in version 1 of The Plant List, record tro-26300536.