This name is a synonym of Phalaris caroliniana Walter.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 433488) with original publication details: Encycl. Suppl. 1: 300 1810.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:300734-2.
This name was in version 1 of The Plant List, record kew-433488, and has not been changed.