This name is a synonym of Helinus mystacinus (Aiton) E.Mey. ex Steud..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 27500941) with original publication details: Hort. Kew. 1: 266 1789.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:718500-1.
This name was in version 1 of The Plant List, record tro-27500941, and has not been changed.