This name is a synonym of Celtis australis subsp. caucasica (Willd.) C.C.Towns..
The record derives from WCSP (in review)
(data supplied on 2012-03-23)
which reports it as a synonym with original publication details: Sp. Pl. 4: 994 1806.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:851016-1.
This name was in version 1 of The Plant List, record kew-2708204, and has not been changed.