This name is a synonym of Carya ovata var. mexicana (Engelm. ex Hemsl.) W.E.Manning.
The record derives from WCSP (in review)
(data supplied on 2012-03-23)
which reports it as a synonym with original publication details: J. Arnold Arbor. 30: 432 1949.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:292469-2.
This name was in version 1 of The Plant List, record kew-2701844.