This name is a synonym of Amphilophium laxiflorum (DC.) L.G.Lohmann.
The record derives from iPlants
(data supplied on 2012-03-23)
which reports it as a synonym and as an invalid name (record 319887) with original publication details: Prodr. 9: 172 1845.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:108651-1.
This name was in version 1 of The Plant List, record kew-319887.