This name is a synonym of Phalaris amethystina Trin..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 433464) with original publication details: Linnaea 33: 276 1864.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:415597-1.
This name was in version 1 of The Plant List, record kew-433464, and has not been changed.