This name is a synonym of Magnolia guatemalensis subsp. hondurensis (A.M.Molina) Vazquez.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 117642) with original publication details: Ceiba 18: 95 1974.
This name was in version 1 of The Plant List, record kew-117642, and has not been changed.