This name is a synonym of Alnus incana subsp. rugosa (Du Roi) R.T.Clausen.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 6420) with original publication details: Nouv. Mém. Soc. Imp. Naturalistes Moscou 13(2): 155 1876.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:9418-2.
This name was in version 1 of The Plant List, record kew-6420, and has not been changed.