This name is a synonym of Patagonica bahiensis (Moric.) Kuntze.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 4000588) with original publication details: Pl. Nouv. Amer. 144, pl. 86 1847.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:120132-1.
This name was in version 1 of The Plant List, record tro-4000588, and has not been changed.