This name is a synonym of Najas marina subsp. sumatrana (W.J.de Wilde) L.Triest.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 309852) with original publication details: Acta Bot. Neerl. 10: 169 1961.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:50957943-1.
This name was in version 1 of The Plant List, record kew-309852, and has not been changed.