This name is a synonym of Grewia crenata (G.Forst.) Schinz & Guillaumin.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50197997) with original publication details: Char. Gen. Pl. 39 1775.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:834782-1.
This name was in version 1 of The Plant List, record tro-50197997, and has not been changed.