This name is a synonym of Amphilophium pauciflorum (A.H.Gentry) L.G.Lohmann.
The record derives from iPlants
(data supplied on 2012-03-23)
which reports it as a synonym (record 320697) with original publication details: Ann. Missouri Bot. Gard. 61: 872 1974.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:82386-2.
This name was in version 1 of The Plant List, record kew-320697.