This name is a synonym of Larix gmelinii var. japonica (Maxim. ex Regel) Pilg..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 379080) with original publication details: Monogr. Abietin. Japan. Reich. 66 1890.
This name was in version 1 of The Plant List, record kew-2493804.