This name is a synonym of Betula alleghaniensis Britton.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 21136) with original publication details: Canad. Field Natural. 80: 161 1966.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:32107-2.
This name was in version 1 of The Plant List, record kew-21136, and has not been changed.