This name is a synonym of Aesculus × mutabilis (Spach) Scheele.
The record derives from WCSP (in review)
(data supplied on 2012-03-26)
which reports it as a synonym with original publication details: J. Arnold Arbor. 7: 241 1926.
This name was in version 1 of The Plant List, record kew-2624545, and has not been changed.