This name is a synonym of Costularia arundinacea (Sol. ex Vahl) Kük..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 263192) with original publication details: Enum. Pl. Obs. 2: 220 1805.
This name was in version 1 of The Plant List, record kew-263192, and has not been changed.