This name is a synonym of Phyllota squarrosa (DC.) Benth..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 13053962) with original publication details: Prodr. 2: 113 1825.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:516915-1.
This name was in version 1 of The Plant List, record tro-13053962, and has not been changed.