This name is a synonym of Acer campestre subsp. leiocarpum (Opiz) Schwer..
The record derives from WCSP (in review)
(data supplied on 2012-03-26)
which reports it as a synonym with original publication details: Ann. K. K. Naturhist. Hofmus. 7: 190 1886.
This name was in version 1 of The Plant List, record kew-2615453.