This name is a synonym of Amphilophium scabriusculum (Mart. ex DC.) L.G.Lohmann.
The record derives from iPlants
(data supplied on 2012-03-23)
which reports it as a synonym (record 320727) with original publication details: Ann. Missouri Bot. Gard. 61: 499 1974.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:82407-2.
This name was in version 1 of The Plant List, record kew-320727, and has not been changed.