This name is a synonym of Quercus helferiana A.DC..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 173163) with original publication details: Fl. Cochinch. 571 1790.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:296291-1.
This name was in version 1 of The Plant List, record kew-173163, and has not been changed.