This name is a synonym of Alnus rubra Bong..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 6587) with original publication details: Bibl. Cult. Trees 104 1949.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:9450-2.
This name was in version 1 of The Plant List, record kew-6587.