This name is a synonym of Alnus trabeculosa Hand.-Mazz..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 6469) with original publication details: J. Arnold Arbor. 6: 140 1925.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:107674-1.
This name was in version 1 of The Plant List, record kew-6469, and has not been changed.