This name is a synonym of Larix laricina (Du Roi) K.Koch.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 379192) with original publication details: Bull. Natl. Mus. Canada 66(17): 28 1931.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:135605-2.
This name was in version 1 of The Plant List, record kew-2497570.