This name is a synonym of Cornus sericea subsp. occidentalis (Torr. & A.Gray) Fosberg.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 331734) with original publication details: Phytologia 15: 428 1967.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:66076-2.
This name was in version 1 of The Plant List, record kew-331734.