This name is a synonym of Psammisia coarctata (Ruiz & Pav.) A.C. Sm..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 12300890) with original publication details: Linnaea 24: 44 1851.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:858612-1.
This name was in version 1 of The Plant List, record tro-12300890, and has not been changed.