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 433555) with original publication details: Syn. Pl. Glumac. 1: 11 1853.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:309785-2.
This name was in version 1 of The Plant List, record kew-433555, and has not been changed.