This name is a synonym of Fagus grandifolia subsp. mexicana (Martínez) A.E.Murray.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 83829) with original publication details: Castanea 30: 168 1965.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:103329-2.
This name was in version 1 of The Plant List, record kew-83829, and has not been changed.