This name is a synonym of Phalaris aquatica L..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym and as an illegitimate name (record 469305) with original publication details: Syst. Veg. ed. 13 2: 88 1774.
This name record (from WCSP) was not included in version 1 of The Plant List. It is possible the same name was included from a different data source, to check this you can search for Phalaris nodosa in version 1 of The Plant List.