This name is a synonym of Quercus × macdonaldii Greene & Kellogg.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 172568) with original publication details: Man. Fl. Pl. Calif. 274 1923.
This name was in version 1 of The Plant List, record kew-172568, and has not been changed.