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 381523) with original publication details: J. Int. Conifer Preserv. Soc. 15: 51 2008.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:77092543-1.
This name was in version 1 of The Plant List, record kew-2607683.