This name is a synonym of Quercus dentata subsp. yunnanensis (Franch.) Menitsky.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 453714) with original publication details: J. Linn. Soc., Bot. 26: 506 1899.
This name record (from WCSP) was not included in version 1 of The Plant List. It is possible the same name was included from a different data source, to check this you can search for Quercus aliena in version 1 of The Plant List.