This name is a synonym of Aesculus californica (Spach) Nutt..
The record derives from WCSP (in review)
(data supplied on 2012-03-26)
which reports it as a synonym with original publication details: Ann. Sci. Nat., Bot. II, 2: 62 1834.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:782168-1.
This name was in version 1 of The Plant List, record kew-2693657, and has not been changed.