This name is a synonym of Canthium inerme (L.f.) Kuntze.
The record derives from WCSP
(data supplied on 2012-03-26)
which reports it as a synonym (record 115866) with original publication details: Suppl. Pl. 150 1782.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:816495-1.
This name was in version 1 of The Plant List, record kew-115866, and has not been changed.